|
Network Working Group Request for Comments: 2670 Category: Proposed Standard |
M. St. Johns, Ed. @Home Network August 1999 |
This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited.
Copyright © The Internet Society (1999). All Rights Reserved.
This memo defines a portion of the Management Information Base (MIB) for use with network management protocols in the Internet community. In particular, it defines a basic set of managed objects for SNMP- based management of MCNS/DOCSIS compliant Radio Frequency (RF) interfaces.
This memo specifies a MIB module in a manner that is compliant to the SNMP SMIv2 [5][6][7]. The set of objects are consistent with the SNMP framework and existing SNMP standards.
This memo is a product of the IPCDN working group within the Internet Engineering Task Force. Comments are solicited and should be addressed to the working group's mailing list at ipcdn@terayon.com and/or the author.
Table of Contents
1 The SNMP Management Framework
2 Glossary
2.1 CATV
2.2 Channel
2.3 CM
2.4 CMTS
2.5 Codeword
2.6 Data Packet
2.7 dBmV
2.8 DOCSIS
2.9 Downstream
2.10 Head-end
2.11 MAC Packet
2.12 MCNS
2.13 Mini-slot
2.14 QPSK
2.15 QAM
2.16 RF
2.17 Symbol-times
2.18 Upstream
3 Overview
3.1 Structure of the MIB
3.1.1 docsIfBaseObjects
3.1.2 docsIfCmObjects
3.1.3 docsIfCmtsObjects
3.2 Relationship to the Interfaces MIB
3.2.1 Layering Model
3.2.2 Virtual Circuits
3.2.3 ifTestTable
3.2.4 ifRcvAddressTable
3.2.5 ifEntry
3.2.5.1 ifEntry for Downstream interfaces
3.2.5.1.1 ifEntry for Downstream interfaces in Cable Modem
Termination Systems
3.2.5.1.2 ifEntry for Downstream interfaces in Cable Modems
3.2.5.2 ifEntry for Upstream interfaces
3.2.5.2.1 ifEntry for Upstream interfaces in Cable Modem
Termination Systems
3.2.5.2.2 ifEntry for Upstream interfaces in Cable Modems
3.2.5.3 ifEntry for the MAC Layer
4 Definitions
5 Acknowledgments
6 References
7 Security Considerations
8 Intellectual Property
9 Author's Address
10 Full Copyright Statement
The SNMP Management Framework presently consists of five major components:
Managed objects are accessed via a virtual information store, termed the Management Information Base or MIB. Objects in the MIB are defined using the mechanisms defined in the SMI.
This memo specifies a MIB module that is compliant to the SMIv2. A MIB conforming to the SMIv1 can be produced through the appropriate translations. The resulting translated MIB MUST be semantically equivalent, except where objects or events are omitted because no translation is possible (use of Counter64). Some machine readable information in SMIv2 will be converted into textual descriptions in SMIv1 during the translation process. However, this loss of machine readable information is not considered to change the semantics of the MIB.
The terms in this document are derived either from normal cable system usage, or from the documents associated with the Data Over Cable Service Interface Specification process.
Originally "Community Antenna Television", now used to refer to any cable or hybrid fiber and cable system used to deliver video signals to a community.
A specific frequency allocation with an RF medium, specified by channel width in Hertz (cycles per second) and by center frequency. Within the US Cable Systems, upstream channels are generally allocated from the 5-42MHz range while down stream channels are generally allocated from the 50-750MHz range depending on the capabilities of the given system. The typical broadcast channel width in the US is 6MHz. Upstream channel widths for DOCSIS vary.
A CM acts as a "slave" station in a DOCSIS compliant cable data system.
A generic term covering a cable bridge or cable router in a head-end. A CMTS acts as the master station in a DOCSIS compliant cable data system. It is the only station that transmits downstream, and it controls the scheduling of upstream transmissions by its associated CMs.
See [16]. A characteristic of the Foward Error Correction scheme used above the RF media layer.
The payload portion of the MAC Packet.
Decibel relative to one milli-volt. A measure of RF power.
"Data Over Cable Interface Specification". A term referring to the ITU-T J.112 Annex B standard for cable modem systems [20].
The direction from the head-end towards the subscriber.
The origination point in most cable systems of the subscriber video signals.
A DOCSIS PDU.
"Multimedia Cable Network System". Generally replaced in usage by DOCSIS.
See [16]. In general, an interval of time which is allocated by the CMTS to a given CM for that CM to transmit in an upstream direction.
A particular modulation scheme on an RF medium. See [19].
A particular modulation scheme on on RF medium. Usually expressed with a number indicating the size of the modulation constellation (e.g. 16 QAM). See [19], or any other book on digital communications over RF for a complete explanation of this.
Radio Frequency.
See [16]. A characteristic of the RF modulation scheme.
The direction from the subscriber towards the head-end.
This MIB provides a set of objects required for the management of MCNS/DOCSIS compliant Cable Modem (CM) and Cable Modem Termination System (CMTS) RF interfaces. The specification is derived in part from the parameters and protocols described in DOCSIS Radio Frequency Interface Specification [16].
This MIB is structured as three groups:
Tables within each of these groups group objects functionally - e.g. Quality of Service, Channel characteristics, MAC layer management, etc. Rows created automatically (e.g. by the device according to the hardware configuration) may and generally will have a mixture of configuration and status objects within them. Rows that are meant to be created by the management station are generally restricted to configuration (read-create) objects.
docsIfDownstreamChannelTable - This table describes the active downstream channels for a CMTS and the received downstream channel for a CM.
docsIfUpstreamChannelTable - This table describes the active upstream channels for a a CMTS and the current upstream transmission channel for a CM.
docsIfQosProfileTable - This table describes the valid Quality of Service service profiles for the cable data system.
docsIfSignalQualityTable - This table is used to monitor RF signal quality characteristics of received signals.
docsIfCmMacTable - This table is used to monitor the DOCSIS MAC interface and can be considered an extension to the ifEntry.
docsIfCmServiceTable - This table describes the upstream service queues available at this CM. There is a comparable table at the CMTS, docsIfCmtsServiceEntry, which describes the service queues from the point of view of the CMTS.
docsIfCmtsStatusTable - This table provides a set of aggregated counters which roll-up values and events that occur on the underlying sub-interfaces.
docsIfCmtsCmStatusTable - This table is used to hold information about known (e.g. registered) cable modems on the system serviced by this CMTS.
docsIfCmtsServiceEntry - This table provides access to the information related to upstream service queues.
docsIfCmtsModulationTable - This table allows control over the modulation profiles for RF channels associated with this CMTS.
docsIfCmtsMacToCmTable - This table allows fast access into the docsIfCmtsCmTable via a MAC address (of the CM) interface.
This section clarifies the relationship of this MIB to the Interfaces MIB [17]. Several areas of correlation are addressed in the following subsections. The implementor is referred to the Interfaces MIB document in order to understand the general intent of these areas.
An instance of ifEntry exists for each RF Downstream interface, for each RF Upstream interface, and for each RF MAC layer. The ifStackTable [17] MUST be implemented to identify relationships among sub-interfaces.
The following example illustrates a MAC interface with one downstream and two upstream channels.
| <== to network layer
+-------------+--------------+
| RF MAC |
+----+---------+-----------+-+
| | |
+---------+---+ +---+-------+ +-+---------+
| Downstream1 | | Upstream1 | | Upstream2 |
+-------------+ +-----------+ +-----------+
As can be seen from this example, the RF MAC interface is layered on top of the downstream and upstream interfaces.
In this example, the assignment of index values could be as follows:
ifIndex ifType Description
1 docsCableMaclayer(127) CATV MAC Layer
2 docsCableDownstream(128) CATV Downstream interface
3 docsCableUpstream(129) CATV Upstream interface
4 docsCableUpstream(129) CATV Upstream interface
The corresponding ifStack entries would then be:
| IfStackHigherLayer | ifStackLowerLayer |
| 0 | 1 |
| 1 | 2 |
| 1 | 3 |
| 1 | 4 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
The same interface model can also be used in Telephony or Telco Return systems. A pure Telco Return system (Cable Modem as well as Cable Modem Termination System) would not have upstream, but only downstream cable channels. Systems supporting both Telco Return and cable upstream channels can use the above model without modification.
Telco Return Upstream channel(s) are handled by the appropriate MIBs, such as PPP or Modem MIBs.
This medium does not support virtual circuits and this area is not applicable to this MIB.
The ifTestTable is not supported by this MIB.
The ifRcvAddressTable is not supported by this MIB.
This section documents only the differences from the requirements specified in the Interfaces MIB. See that MIB for columns omitted from the descriptions below.
The ifEntry for Downstream interfaces supports the
ifGeneralInformationGroup and the ifPacketGroup of the Interfaces
MIB. This is an output only interface at the CMTS and all input
status counters - ifIn* - will return zero. This is an input only
interface at the CM and all output status counters - ifOut* - will
return zero.
ifTable Comments
============== ===========================================
ifIndex Each RF Cable Downstream interface is represented
by an ifEntry.
ifType The IANA value of docsCableDownstream(128).
ifSpeed Return the speed of this downstream channel.
The returned value the raw bandwidth in bits/s
of this interface. This is the symbol rate
multiplied with the number of bits per symbol.
ifPhysAddress Return an empty string.
ifAdminStatus The administrative status of this interface.
ifOperStatus The current operational status of this interface.
ifMtu The size of the largest frame which can be
sent on this interface, specified in octets.
The value includes the length of the MAC header.
ifInOctets Return zero. ifInUcastPkts Return zero.
ifInMulticastPkts Return zero.
ifInBroadcastPkts Return zero.
ifInDiscards Return zero. ifInErrors Return zero.
ifInUnknownProtos Return zero.
ifOutOctets The total number of octets transmitted on this
interface. This includes MAC packets as well as
data packets, and includes the length of the MAC
header.
ifOutUcastPkts The number of Unicast packets transmitted on this
interface. This includes MAC packets as well as
data packets.
ifOutMulticastPkts
Return the number of Multicast packets transmitted
on this interface.
This includes MAC packets as well as data packets.
ifOutBroadcastPkts
Return the number of broadcast packets transmitted
on this interface.
This includes MAC packets as well as data packets.
ifOutDiscards The total number of outbound packets which
were discarded. Possible reasons are:
buffer shortage.
ifOutErrors The number of packets which could not be
transmitted due to errors.
ifPromiscuousMode Return false.
ifTable Comments
============== ===========================================
ifIndex Each RF Cable Downstream interface is represented
by an ifEntry.
ifType The IANA value of docsCableDownstream(128).
ifSpeed Return the speed of this downstream channel.
The returned value the raw bandwidth in bits/s
of this interface. This is the symbol rate
multiplied with the number of bits per symbol.
ifPhysAddress Return an empty string.
ifAdminStatus The administrative status of this interface.
ifOperStatus The current operational status of this interface.
ifMtu The size of the largest frame which can be
received from this interface, specified in octets.
The value includes the length of the MAC header.
ifInOctets The total number of octets received on this
interface. This includes data packets as well as
MAC layer packets, and includes the length of the
MAC header.
ifInUcastPkts The number of Unicast packets received on this
interface. This includes data packets as well as
MAC layer packets.
ifInMulticastPkts Return the number of Multicast packets received on this interface. This includes data packets as well as MAC layer packets.
ifInBroadcastPkts Return the number of Broadcast packets received on this interface. This includes data packets as well as MAC layer packets.
ifInDiscards The total number of received packets which have
been discarded.
The possible reasons are: buffer shortage.
ifInErrors The number of inbound packets that contained
errors preventing them from being deliverable
to higher layers.
Possible reasons are: MAC FCS error.
ifInUnknownProtos The number of frames with an unknown packet type. These are MAC frames with an unknown packet type.
ifOutOctets Return zero. ifOutUcastPkts Return zero.
ifOutMulticastPkts
Return zero.
ifOutBroadcastPkts
Return zero.
ifOutDiscards Return zero. ifOutErrors Return zero.
ifPromiscuousMode Refer to the Interfaces MIB.
The ifEntry for Upstream interfaces supports the
ifGeneralInformationGroup and the ifPacketGroup of the Interfaces
MIB. This is an input only interface at the CMTS and all output
status counters - ifOut* - will return zero. This is an output only
interface at the CM and all input status counters - ifIn* - will
return zero.
ifTable Comments
============== ===========================================
ifIndex Each RF Cable Upstream interface is represented
by an ifEntry.
ifType The IANA value of docsCableUpstream(129).
ifSpeed Return the speed of this upstream channel.
The returned value is the raw bandwidth
in bits/s of this interface, regarding the
highest speed modulation profile that is
defined. This is the symbol rate multiplied
with the number of bits per symbol for this
modulation profile.
ifPhysAddress Return an empty string.
ifAdminStatus The administrative status of this interface.
ifOperStatus The current operational status of this interface.
ifMtu The size of the largest frame which can be
received on this interface, specified in octets.
The value includes the length of the MAC header.
ifInOctets The total number of octets received on this
interface. This includes data packets as well as
MAC layer packets, and includes the length of the
MAC header.
ifInUcastPkts The number of Unicast packets received on this
interface. This includes data packets as well as
MAC layer packets.
ifInMulticastPkts Return the number of Multicast packets received on this interface. This includes data packets as well as MAC layer packets.
ifInBroadcastPkts Return the number of Broadcast packets received on this interface. This includes data packets as well as MAC layer packets.
ifInDiscards The total number of received packets which have
been discarded.
The possible reasons are: buffer shortage.
ifInErrors The number of inbound packets that contained
errors preventing them from being deliverable
to higher layers.
Possible reasons are: MAC FCS error.
ifInUnknownProtos The number of frames with an unknown packet type. This are MAC frames with an unknown packet type.
ifOutOctets Return zero. ifOutUcastPkts Return zero.
ifOutMulticastPkts
Return zero.
ifOutBroadcastPkts
Return zero.
ifOutDiscards Return zero. ifOutErrors Return zero.
ifTable Comments
============== ===========================================
ifIndex Each RF Cable Upstream interface is represented
by an ifEntry.
ifType The IANA value of docsCableUpstream(129).
ifSpeed Return the speed of this upstream channel.
The returned value is the raw bandwidth
in bits/s of this interface, regarding the
highest speed modulation profile that is
defined. This is the symbol rate multiplied
with the number of bits per symbol for this
modulation profile.
ifPhysAddress Return an empty string.
ifAdminStatus The administrative status of this interface.
ifOperStatus The current operational status of this interface.
ifMtu The size of the largest frame which can be
transmitted on this interface, specified in octets.
The value includes the length of the MAC header.
ifInOctets Return zero.
ifInUcastPkts Return zero.
ifInMulticastPkts Return zero.
ifInBroadcastPkts Return zero.
ifInDiscards Return zero. ifInErrors Return zero.
ifInUnknownProtos Return zero.
ifOutOctets The total number of octets transmitted on this
interface. This includes MAC packets as well as
data packets, and includes the length of the MAC
header.
ifOutUcastPkts The number of Unicast packets transmitted on this
interface. This includes MAC packets as well as
data packets.
ifOutMulticastPkts
Return the number of Multicast packets transmitted
on this interface.
This includes MAC packets as well as data packets.
ifOutBroadcastPkts
Return the number of broadcast packets transmitted
on this interface.
This includes MAC packets as well as data packets.
ifOutDiscards The total number of outbound packets which
were discarded. Possible reasons are:
buffer shortage.
ifOutErrors The number of packets which could not be
transmitted due to errors.
ifPromiscuousMode Return false.
The ifEntry for the MAC Layer supports the ifGeneralInformationGroup and the ifPacketGroup of the Interfaces MIB. This interface provides an aggregate view of status for the lower level Downstream and Upstream interfaces.
ifTable Comments
============== ===========================================
ifIndex Each RF Cable MAC layer entity is represented
by an ifEntry.
ifType The IANA value of docsCableMaclayer(127).
ifSpeed Return zero.
ifPhysAddress Return the physical address of this interface.
ifAdminStatus The administrative status of this interface.
ifOperStatus The current operational status of the MAC
layer interface.
ifHighSpeed Return zero.
ifMtu Return 1500.
ifInOctets The total number of data octets received on this
interface, targeted for upper protocol layers.
ifInUcastPkts The number of Unicast packets received on this
interface, targeted for upper protocol layers.
ifInMulticastPkts Return the number of Multicast packets received on this interface, targeted for upper protocol layers.
ifInBroadcastPkts Return the number of Broadcast packets received on this interface, targeted for upper protocol layers.
ifInDiscards The total number of received packets which have
been discarded.
The possible reasons are: buffer shortage.
ifInErrors The number of inbound packets that contained
errors preventing them from being deliverable
to higher layers.
Possible reasons are: data packet FCS error,
invalid MAC header.
ifInUnknownProtos The number of frames with an unknown packet type. This is the number of data packets targeted for upper protocol layers with an unknown packet type.
ifOutOctets The total number of octets, received from upper
protocol layers and transmitted on this interface.
ifOutUcastPkts The number of Unicast packets, received from upper
protocol layers and transmitted on this interface.
ifOutMulticastPkts
Return the number of Multicast packets received
from upper protocol layers and transmitted on this
interface.
ifOutBroadcastPkts
Return the number of broadcast packets received
from upper protocol layers and transmitted on this
interface.
ifOutDiscards The total number of outbound packets which
were discarded. Possible reasons are:
buffer shortage.
ifOutErrors The number of packets which could not be
transmitted due to errors.
ifPromiscuousMode Refer to the Interfaces MIB.
DOCS-IF-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY,
OBJECT-TYPE,
-- do not import BITS,
Unsigned32,
Integer32,
Counter32,
TimeTicks,
IpAddress,
transmission
FROM SNMPv2-SMI
TEXTUAL-CONVENTION,
MacAddress,
RowStatus,
TruthValue,
TimeInterval,
TimeStamp
FROM SNMPv2-TC
OBJECT-GROUP,
MODULE-COMPLIANCE
FROM SNMPv2-CONF
ifIndex, InterfaceIndexOrZero
FROM IF-MIB;
LAST-UPDATED "9908190000Z" -- August 19, 1999
ORGANIZATION "IETF IPCDN Working Group"
CONTACT-INFO
" Michael StJohns
Postal: @Home Network
425 Broadway
Redwood City, CA
U.S.A.
Phone: +1 650 569 5368
E-mail: stjohns@corp.home.net"
DESCRIPTION
"This is the MIB Module for MCNS/DOCSIS compliant Radio
Frequency (RF) interfaces in Cable Modems (CM) and
Cable Modem Termination Systems (CMTS)."
REVISION "9908190000Z"
DESCRIPTION
"Initial Version, published as RFC 2670.
Modified by Mike StJohns to fix problems identified by
the first pass of the MIB doctor. Of special note, docsIfRangingResp and docsIfCmtsInsertionInterval were obsoleted and replaced by other objects with the same functionality, but more appropriate SYNTAX."
::= { transmission 127 }
-- Textual Conventions
TenthdBmV ::= TEXTUAL-CONVENTION
DISPLAY-HINT "d-1"
STATUS current
DESCRIPTION
"This data type represents power levels that are normally
expressed in dBmV. Units are in tenths of a dBmV;
for example, 5.1 dBmV will be represented as 51."
SYNTAX Integer32
TenthdB ::= TEXTUAL-CONVENTION
DISPLAY-HINT "d-1"
STATUS current
DESCRIPTION
"This data type represents power levels that are normally
expressed in dB. Units are in tenths of a dB;
for example, 5.1 dB will be represented as 51."
SYNTAX Integer32
docsIfMibObjects OBJECT IDENTIFIER ::= { docsIfMib 1 }
docsIfBaseObjects OBJECT IDENTIFIER ::= { docsIfMibObjects 1 }
docsIfCmObjects OBJECT IDENTIFIER ::= { docsIfMibObjects 2 }
docsIfCmtsObjects OBJECT IDENTIFIER ::= { docsIfMibObjects 3 }
--
-- BASE GROUP
-- --
-- The following table is implemented on both the Cable Modem (CM)
-- and the Cable Modem Termination System (CMTS).
--
SYNTAX SEQUENCE OF DocsIfDownstreamChannelEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table describes the attributes of downstream
channels (frequency bands)."
REFERENCE
"DOCSIS Radio Frequency Interface Specification, Table 4-12 and Table 4-13."
::= { docsIfBaseObjects 1 }
SYNTAX DocsIfDownstreamChannelEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry provides a list of attributes for a single
Downstream channel.
An entry in this table exists for each ifEntry with an
ifType of docsCableDownstream(128)."
INDEX { ifIndex }
::= { docsIfDownstreamChannelTable 1 }
DocsIfDownstreamChannelEntry ::= SEQUENCE {
docsIfDownChannelId Integer32,
docsIfDownChannelFrequency Integer32,
docsIfDownChannelWidth Integer32,
docsIfDownChannelModulation INTEGER,
docsIfDownChannelInterleave INTEGER,
docsIfDownChannelPower TenthdBmV
}
SYNTAX Integer32 (0..255)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The Cable Modem Termination System (CMTS) identification
of the downstream channel within this particular MAC
interface. If the interface is down, the object returns
the most current value. If the downstream channel ID is
unknown, this object returns a value of 0."
::= { docsIfDownstreamChannelEntry 1 }
SYNTAX Integer32 (0..1000000000)
UNITS "hertz"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The center of the downstream frequency associated with
this channel. This object will return the current tuner
frequency. If a CMTS provides IF output, this object
will return 0, unless this CMTS is in control of the
final downstream RF frequency. See the associated
compliance object for a description of valid frequencies
that may be written to this object."
REFERENCE
"DOCSIS Radio Frequency Interface Specification,
Section 4.3.3."
::= { docsIfDownstreamChannelEntry 2 }
SYNTAX Integer32 (0..16000000)
UNITS "hertz"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The bandwidth of this downstream channel. Most
implementations are expected to support a channel width
of 6 MHz (North America) and/or 8 MHz (Europe). See the
associated compliance object for a description of the
valid channel widths for this object."
REFERENCE
"DOCSIS Radio Frequency Interface Specification,
Table 4-12 and Table 4-13."
::= { docsIfDownstreamChannelEntry 3 }
SYNTAX INTEGER {
unknown(1),
other(2),
qam64(3),
qam256(4)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The modulation type associated with this downstream
channel. If the interface is down, this object either
returns the configured value (CMTS), the most current
value (CM), or the value of unknown(1). See the
associated conformance object for write conditions and
limitations. See the reference for specifics on the
modulation profiles implied by qam64 and qam256."
REFERENCE
"DOCSIS Radio Frequency Interface Specification,
Section 3.6.2."
::= { docsIfDownstreamChannelEntry 4 }
SYNTAX INTEGER {
unknown(1),
other(2),
taps8Increment16(3),
taps16Increment8(4),
taps32Increment4(5),
taps64Increment2(6),
taps128Increment1(7)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The Forward Error Correction (FEC) interleaving used
for this downstream channel.
Values are defined as follows:
taps8Increment16(3): protection 5.9/4.1 usec,
latency .22/.15 msec
taps16Increment8(4): protection 12/8.2 usec,
latency .48/.33 msec
taps32Increment4(5): protection 24/16 usec,
latency .98/.68 msec
taps64Increment2(6): protection 47/33 usec,
latency 2/1.4 msec
taps128Increment1(7): protection 95/66 usec,
latency 4/2.8 msec
If the interface is down, this object either returns
the configured value (CMTS), the most current value (CM),
or the value of unknown(1).
The value of other(2) is returned if the interleave
is known but not defined in the above list.
See the associated conformance object for write
conditions and limitations. See the reference for the FEC
configuration described by the setting of this object."
REFERENCE
"DOCSIS Radio Frequency Interface Specification,
Section 4.3.2."
::= { docsIfDownstreamChannelEntry 5 }
SYNTAX TenthdBmV
UNITS "dBmV"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"At the CMTS, the operational transmit power. At the CM,
the received power level. May be set to zero at the CM
if power level measurement is not supported.
If the interface is down, this object either returns
the configured value (CMTS), the most current value (CM)
or the value of 0. See the associated conformance object
for write conditions and limitations. See the reference
for recommended and required power levels."
REFERENCE
"DOCSIS Radio Frequency Interface Specification,
Table 4-12 and Table 4-13."
::= { docsIfDownstreamChannelEntry 6 }
--
-- The following table is implemented on both the CM and the CMTS.
-- For the CM, only attached channels appear in the table. For the
-- CM, this table is read only as well.
--
SYNTAX SEQUENCE OF DocsIfUpstreamChannelEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table describes the attributes of attached upstream
channels (frequency bands)."
::= { docsIfBaseObjects 2 }
SYNTAX DocsIfUpstreamChannelEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"List of attributes for a single upstream channel.
An entry in this table exists for each ifEntry with an
ifType of docsCableUpstream(129)."
INDEX { ifIndex }
::= { docsIfUpstreamChannelTable 1 }
DocsIfUpstreamChannelEntry ::= SEQUENCE {
docsIfUpChannelId Integer32,
docsIfUpChannelFrequency Integer32,
docsIfUpChannelWidth Integer32,
docsIfUpChannelModulationProfile Unsigned32,
docsIfUpChannelSlotSize Unsigned32,
docsIfUpChannelTxTimingOffset Unsigned32,
docsIfUpChannelRangingBackoffStart Integer32,
docsIfUpChannelRangingBackoffEnd Integer32,
docsIfUpChannelTxBackoffStart Integer32,
docsIfUpChannelTxBackoffEnd Integer32
}
SYNTAX Integer32 (0..255)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The CMTS identification of the upstream channel."
::= { docsIfUpstreamChannelEntry 1 }
SYNTAX Integer32 (0..1000000000)
UNITS "hertz"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The center of the frequency band associated with this
upstream channel. This object returns 0 if the frequency
is undefined or unknown. Minimum permitted upstream
frequency is 5,000,000 Hz for current technology. See
the associated conformance object for write conditions
and limitations."
REFERENCE
"DOCSIS Radio Frequency Interface Specification,
Table 2-2."
::= { docsIfUpstreamChannelEntry 2 }
SYNTAX Integer32 (0..20000000)
UNITS "hertz"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The bandwidth of this upstream channel. This object
returns 0 if the channel width is undefined or unknown.
Minimum permitted channel width is 200,000 Hz currently.
See the associated conformance object for write conditions
and limitations."
REFERENCE
"DOCSIS Radio Frequency Interface Specification,
Table 4-3."
::= { docsIfUpstreamChannelEntry 3 }
SYNTAX Unsigned32
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"An entry identical to the docsIfModIndex in the
docsIfCmtsModulationTable that describes this channel.
This channel is further instantiated there by a grouping
of interval usage codes which together fully describe the
channel modulation. This object returns 0 if the
docsIfCmtsModulationTable entry does not exist or
docsIfCmtsModulationTable is empty. See
the associated conformance object for write conditions
and limitations."
::= { docsIfUpstreamChannelEntry 4 }
SYNTAX Unsigned32
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The number of 6.25 microsecond ticks in each upstream mini-
slot. Returns zero if the value is undefined or unknown.
See the associated conformance object for write
conditions and limitations."
REFERENCE
"DOCSIS Radio Frequency Interface Specification,
Section 6.1.2.4."
::= { docsIfUpstreamChannelEntry 5 }
SYNTAX Unsigned32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A measure of the current round trip time at the CM, or the
maximum round trip time seen by the CMTS. Used for timing
of CM upstream transmissions to ensure synchronized
arrivals at the CMTS. Units are in terms of
(6.25 microseconds/64)."
REFERENCE
"DOCSIS Radio Frequency Interface Specification,
Section 6.5."
::= { docsIfUpstreamChannelEntry 6 }
SYNTAX Integer32 (0..16)
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The initial random backoff window to use when retrying
Ranging Requests. Expressed as a power of 2. A value of 16
at the CMTS indicates that a proprietary adaptive retry
mechanism is to be used. See the associated conformance
object for write conditions and limitations."
REFERENCE
"DOCSIS Radio Frequency Interface Specification,
::= { docsIfUpstreamChannelEntry 7 }
SYNTAX Integer32 (0..16)
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The final random backoff window to use when retrying
Ranging Requests. Expressed as a power of 2. A value of 16
at the CMTS indicates that a proprietary adaptive retry
mechanism is to be used. See the associated conformance
object for write conditions and limitations."
REFERENCE
"DOCSIS Radio Frequency Interface Specification,
Section 6.4.4."
::= { docsIfUpstreamChannelEntry 8 }
SYNTAX Integer32 (0..16)
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The initial random backoff window to use when retrying
transmissions. Expressed as a power of 2. A value of 16
at the CMTS indicates that a proprietary adaptive retry
mechanism is to be used. See the associated conformance
object for write conditions and limitations."
REFERENCE
"DOCSIS Radio Frequency Interface Specification,
Section 6.4.4."
::= { docsIfUpstreamChannelEntry 9 }
SYNTAX Integer32 (0..16)
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The final random backoff window to use when retrying
transmissions. Expressed as a power of 2. A value of 16
at the CMTS indicates that a proprietary adaptive retry
mechanism is to be used. See the associated conformance
object for write conditions and limitations."
REFERENCE
"DOCSIS Radio Frequency Interface Specification,
Section 6.4.4."
::= { docsIfUpstreamChannelEntry 10 }
-- The following table describes the attributes of each class of
-- service. The entries in this table are referenced from the
-- docsIfServiceEntries. They exist as a separate table in order to
-- reduce redundant information in docsIfServiceTable.
--
-- This table is implemented at both the CM and the CMTS.
-- The CM need only maintain entries for the classes of service
-- referenced by its docsIfServiceTable.
--
SYNTAX SEQUENCE OF DocsIfQosProfileEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Describes the attributes for each class of service."
::= { docsIfBaseObjects 3 }
SYNTAX DocsIfQosProfileEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Describes the attributes for a single class of service.
If implemented as read-create in the Cable Modem Termination System, creation of entries in this table is controlled by the value of docsIfCmtsQosProfilePermissions.
If implemented as read-only, entries are created based
on information in REG-REQ MAC messages received from
Cable Modems (Cable Modem Termination System
implementation), or based on information extracted from
the TFTP option file (Cable Modem implementation).
In the Cable Modem Termination system, read-only entries
are removed if no longer referenced by
docsIfCmtsServiceTable.
An entry in this table must not be removed while it is referenced by an entry in docsIfCmServiceTable (Cable Modem) or docsIfCmtsServiceTable (Cable Modem Termination System).
An entry in this table should not be changeable while it is referenced by an entry in docsIfCmtsServiceTable.
If this table is created automatically, there should only be a single entry for each Class of Service. Multiple entries with the same Class of Service parameters are not
recommended."
INDEX { docsIfQosProfIndex }
::= { docsIfQosProfileTable 1 }
DocsIfQosProfileEntry ::= SEQUENCE {
docsIfQosProfIndex Integer32,
docsIfQosProfPriority Integer32,
docsIfQosProfMaxUpBandwidth Integer32,
docsIfQosProfGuarUpBandwidth Integer32,
docsIfQosProfMaxDownBandwidth Integer32,
docsIfQosProfMaxTxBurst Integer32,
docsIfQosProfBaselinePrivacy TruthValue,
docsIfQosProfStatus RowStatus
}
SYNTAX Integer32 (1..16383)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The index value which uniquely identifies an entry
in the docsIfQosProfileTable."
::= { docsIfQosProfileEntry 1 }
SYNTAX Integer32 (0..7)
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"A relative priority assigned to this service when
allocating bandwidth. Zero indicates lowest priority;
and seven indicates highest priority.
Interpretation of priority is device-specific.
MUST NOT be changed while this row is active."
DEFVAL { 0 }
::= { docsIfQosProfileEntry 2 }
SYNTAX Integer32 (0..100000000)
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The maximum upstream bandwidth, in bits per second,
allowed for a service with this service class.
Zero if there is no restriction of upstream bandwidth.
MUST NOT be changed while this row is active."
DEFVAL { 0 }
::= { docsIfQosProfileEntry 3 }
SYNTAX Integer32 (0..100000000)
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Minimum guaranteed upstream bandwidth, in bits per second,
allowed for a service with this service class.
MUST NOT be changed while this row is active."
DEFVAL { 0 }
::= { docsIfQosProfileEntry 4 }
SYNTAX Integer32 (0..100000000)
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The maximum downstream bandwidth, in bits per second,
allowed for a service with this service class.
Zero if there is no restriction of downstream bandwidth.
MUST NOT be changed while this row is active."
DEFVAL { 0 }
::= { docsIfQosProfileEntry 5 }
SYNTAX Integer32 (0..255)
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The maximum number of mini-slots that may be requested
for a single upstream transmission.
A value of zero means there is no limit.
MUST NOT be changed while this row is active."
DEFVAL { 0 }
::= { docsIfQosProfileEntry 6 }
SYNTAX TruthValue
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Indicates whether Baseline Privacy is enabled for this
service class.
MUST NOT be changed while this row is active."
DEFVAL { false }
::= { docsIfQosProfileEntry 7 }
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This is object is to used to create or delete rows in
this table. This object MUST NOT be changed from active
while the row is referenced by the any entry in either
docsIfCmServiceTable (on the CM), or the
docsIfCmtsServiceTable (on the CMTS)."
::= { docsIfQosProfileEntry 8 }
SYNTAX SEQUENCE OF DocsIfSignalQualityEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"At the CM, describes the PHY signal quality of downstream
channels. At the CMTS, describes the PHY signal quality of
upstream channels. At the CMTS, this table may exclude
contention intervals."
::= { docsIfBaseObjects 4 }
SYNTAX DocsIfSignalQualityEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"At the CM, describes the PHY characteristics of a
downstream channel. At the CMTS, describes the PHY signal
quality of an upstream channel.
An entry in this table exists for each ifEntry with an
ifType of docsCableUpstream(129) for Cable Modem Termination
Systems and docsCableDownstream(128) for Cable Modems."
INDEX { ifIndex }
::= { docsIfSignalQualityTable 1 }
DocsIfSignalQualityEntry ::= SEQUENCE {
docsIfSigQIncludesContention TruthValue,
docsIfSigQUnerroreds Counter32,
docsIfSigQCorrecteds Counter32,
docsIfSigQUncorrectables Counter32,
docsIfSigQSignalNoise TenthdB,
docsIfSigQMicroreflections Integer32,
docsIfSigQEqualizationData OCTET STRING
}
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"true(1) if this CMTS includes contention intervals in
the counters in this table. Always false(2) for CMs."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Section 6.4.4"
::= { docsIfSignalQualityEntry 1 }
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Codewords received on this channel without error.
This includes all codewords, whether or not they
were part of frames destined for this device."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Section 4.2.3 and 4.3.6"
::= { docsIfSignalQualityEntry 2 }
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Codewords received on this channel with correctable
errors. This includes all codewords, whether or not
they were part of frames destined for this device."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Section 4.2.3 and 4.3.6"
::= { docsIfSignalQualityEntry 3 }
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Codewords received on this channel with uncorrectable
errors. This includes all codewords, whether or not
they were part of frames destined for this device."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Section 4.2.3 and 4.3.6"
::= { docsIfSignalQualityEntry 4 }
SYNTAX TenthdB
UNITS "dB"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Signal/Noise ratio as perceived for this channel.
At the CM, describes the Signal/Noise of the downstream
channel. At the CMTS, describes the average Signal/Noise
of the upstream channel."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Table 2-1 and 2-2"
::= { docsIfSignalQualityEntry 5 }
SYNTAX Integer32 (0..255)
UNITS "dBc"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total microreflections including in-channel response
as perceived on this interface, measured in dBc below
the signal level.
This object is not assumed to return an absolutely
accurate value, but should give a rough indication
of microreflections received on this interface.
It is up to the implementor to provide information
as accurate as possible."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Table 2-1 and 2-2"
::= { docsIfSignalQualityEntry 6 }
SYNTAX OCTET STRING
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"At the CM, returns the equalization data for the downstream
channel. At the CMTS, returns the average equalization
data for the upstream channel. Returns an empty string
if the value is unknown or if there is no equalization
data available or defined."
REFERENCE
"DOCSIS Radio Frequency Interface Specification,
Figure 6-23."
::= { docsIfSignalQualityEntry 7 }
--
-- CABLE MODEM GROUP
-- -- ####### --
-- The CM MAC Table
--
SYNTAX SEQUENCE OF DocsIfCmMacEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Describes the attributes of each CM MAC interface,
extending the information available from ifEntry."
::= { docsIfCmObjects 1 }
SYNTAX DocsIfCmMacEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry containing objects describing attributes of
each MAC entry, extending the information in ifEntry.
An entry in this table exists for each ifEntry with an
ifType of docsCableMaclayer(127)."
INDEX { ifIndex }
::= { docsIfCmMacTable 1 }
DocsIfCmMacEntry ::= SEQUENCE {
docsIfCmCmtsAddress MacAddress,
docsIfCmCapabilities BITS,
docsIfCmRangingRespTimeout TimeTicks,
docsIfCmRangingTimeout TimeInterval
}
SYNTAX MacAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Identifies the CMTS that is believed to control this MAC
domain. At the CM, this will be the source address from
SYNC, MAP, and other MAC-layer messages. If the CMTS is
unknown, returns 00-00-00-00-00-00."
::= { docsIfCmMacEntry 1 }
SYNTAX BITS {
atmCells(0),
concatenation(1)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Identifies the capabilities of the MAC implementation
at this interface. Note that packet transmission is
always supported. Therefore, there is no specific bit
required to explicitely indicate this capability."
::= { docsIfCmMacEntry 2 }
-- This object has been obsoleted and replaced by
-- docsIfCmRangingTimeout to correct the typing to TimeInterval. New
-- implementations of the MIB should use docsIfCmRangingTimeout instead.
SYNTAX TimeTicks
MAX-ACCESS read-write
STATUS obsolete
DESCRIPTION
"Waiting time for a Ranging Response packet."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Figure 7-6 and 7-7, timer T3."
DEFVAL { 20 }
::= { docsIfCmMacEntry 3 }
SYNTAX TimeInterval
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"Waiting time for a Ranging Response packet."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Figure 7-6 and 7-7, timer T3."
DEFVAL { 20 }
::= { docsIfCmMacEntry 4 }
--
-- CM status table.
-- This table is implemented only at the CM.
--
SYNTAX SEQUENCE OF DocsIfCmStatusEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table maintains a number of status objects
and counters for Cable Modems."
::= { docsIfCmObjects 2 }
SYNTAX DocsIfCmStatusEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A set of status objects and counters for a single MAC
layer instance in a Cable Modem.
An entry in this table exists for each ifEntry with an
ifType of docsCableMaclayer(127)."
INDEX { ifIndex }
::= { docsIfCmStatusTable 1 }
DocsIfCmStatusEntry ::= SEQUENCE {
docsIfCmStatusValue INTEGER,
docsIfCmStatusCode OCTET STRING,
docsIfCmStatusTxPower TenthdBmV,
docsIfCmStatusResets Counter32,
docsIfCmStatusLostSyncs Counter32,
docsIfCmStatusInvalidMaps Counter32,
docsIfCmStatusInvalidUcds Counter32,
-- docsIfCmStatusInvalidRangingResp Counter32,
docsIfCmStatusInvalidRangingResponses Counter32,
-- docsIfCmStatusInvalidRegistrationResp Counter32,
docsIfCmStatusInvalidRegistrationResponses Counter32,
docsIfCmStatusT1Timeouts Counter32,
docsIfCmStatusT2Timeouts Counter32,
docsIfCmStatusT3Timeouts Counter32,
docsIfCmStatusT4Timeouts Counter32,
docsIfCmStatusRangingAborteds Counter32
}
SYNTAX INTEGER {
other(1),
notReady(2),
notSynchronized(3),
phySynchronized(4),
usParametersAcquired(5),
rangingComplete(6),
ipComplete(7),
todEstablished(8),
securityEstablished(9),
paramTransferComplete(10),
registrationComplete(11),
operational(12),
accessDenied(13)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Current Cable Modem connectivity state, as specified
in the RF Interface Specification."
REFERENCE
"DOCSIS Radio Frequency Interface Specification,
Chapter 7.2."
::= { docsIfCmStatusEntry 1 }
SYNTAX OCTET STRING
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Status code for this Cable Modem as defined in the
RF Interface Specification. The status code consists
of a single character indicating error groups, followed
by a two- or three-digit number indicating the status
condition."
REFERENCE
"DOCSIS Radio Frequency Interface Specification,
Cable Modem status codes."
::= { docsIfCmStatusEntry 2 }
SYNTAX TenthdBmV
UNITS "dBmV"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The operational transmit power for the attached upstream
channel."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Section 4.2.8."
::= { docsIfCmStatusEntry 3 }
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Number of times the CM reset or initialized
this interface."
::= { docsIfCmStatusEntry 4 }
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Number of times the CM lost synchronization with
the downstream channel."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Section 6.5."
::= { docsIfCmStatusEntry 5 }
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Number of times the CM received invalid MAP messages."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Section 6.3.2.3 and 6.4.2."
::= { docsIfCmStatusEntry 6 }
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Number of times the CM received invalid UCD messages."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Section 6.3.2.2."
::= { docsIfCmStatusEntry 7 }
-- docsIfCmStatusInvalidRangingResp replaced for Counter32
-- naming requirements
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Number of times the CM received invalid ranging response messages."
::= { docsIfCmStatusEntry 8 }
-- docsIfCmStatusInvalidRegistrationResp replaced for
-- Counter32 naming requirements
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Number of times the CM received invalid registration
response messages."
::= { docsIfCmStatusEntry 9 }
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Number of times counter T1 expired in the CM."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Figure 7-3."
::= { docsIfCmStatusEntry 10 }
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Number of times counter T2 expired in the CM."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Figure 7-6."
::= { docsIfCmStatusEntry 11 }
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Number of times counter T3 expired in the CM."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Figure 7-6 and 7-7."
::= { docsIfCmStatusEntry 12 }
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Number of times counter T4 expired in the CM."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Figure 7-7."
::= { docsIfCmStatusEntry 13 }
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Number of times the ranging process was aborted
by the CMTS."
::= { docsIfCmStatusEntry 14 }
--
-- The Cable Modem Service Table
--
SYNTAX SEQUENCE OF DocsIfCmServiceEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Describes the attributes of each upstream service queue
on a CM."
::= { docsIfCmObjects 3 }
SYNTAX DocsIfCmServiceEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Describes the attributes of an upstream bandwidth service
queue.
An entry in this table exists for each Service ID.
The primary index is an ifIndex with an ifType of
docsCableMaclayer(127)."
INDEX { ifIndex, docsIfCmServiceId }
::= { docsIfCmServiceTable 1 }
DocsIfCmServiceEntry ::= SEQUENCE {
docsIfCmServiceId Integer32,
docsIfCmServiceQosProfile Integer32,
docsIfCmServiceTxSlotsImmed Counter32,
docsIfCmServiceTxSlotsDed Counter32,
docsIfCmServiceTxRetries Counter32,
-- docsIfCmServiceTxExceeded Counter32,
docsIfCmServiceTxExceededs Counter32,
docsIfCmServiceRqRetries Counter32,
-- docsIfCmServiceRqExceeded Counter32
docsIfCmServiceRqExceededs Counter32
}
SYNTAX Integer32 (1..16383)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Identifies a service queue for upstream bandwidth. The
attributes of this service queue are shared between the
CM and the CMTS. The CMTS allocates upstream bandwidth
to this service queue based on requests from the CM and
on the class of service associated with this queue."
::= { docsIfCmServiceEntry 1 }
SYNTAX Integer32 (0..16383)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The index in docsIfQosProfileTable describing the quality
of service attributes associated with this particular
service. If no associated entry in docsIfQosProfileTable
exists, this object returns a value of zero."
::= { docsIfCmServiceEntry 2 }
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of upstream mini-slots which have been used to
transmit data PDUs in immediate (contention) mode. This
includes only those PDUs which are presumed to have
arrived at the headend (i.e., those which were explicitly
acknowledged.) It does not include retransmission attempts
or mini-slots used by Requests."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
::= { docsIfCmServiceEntry 3 }
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of upstream mini-slots which have been used to
transmit data PDUs in dedicated mode (i.e., as a result
of a unicast Data Grant)."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Section 6.4."
::= { docsIfCmServiceEntry 4 }
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of attempts to transmit data PDUs containing
requests for acknowledgment which did not result in
acknowledgment."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Section 6.4."
::= { docsIfCmServiceEntry 5 }
-- docsIfCmServiceTxExceeded renamed for Counter32 naming requirements
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of data PDUs transmission failures due to
excessive retries without acknowledgment."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Section 6.4."
::= { docsIfCmServiceEntry 6 }
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of attempts to transmit bandwidth requests
which did not result in acknowledgment."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Section 6.4."
::= { docsIfCmServiceEntry 7 }
-- docsIfCmServiceRqExceeded renamed for Counter 32 naming
-- requirements
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of requests for bandwidth which failed due to
excessive retries without acknowledgment."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Section 6.4."
::= { docsIfCmServiceEntry 8 }
--
-- CMTS GROUP
-- --
-- The CMTS MAC Table
--
SYNTAX SEQUENCE OF DocsIfCmtsMacEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Describes the attributes of each CMTS MAC interface,
extending the information available from ifEntry.
Mandatory for all CMTS devices."
::= { docsIfCmtsObjects 1 }
SYNTAX DocsIfCmtsMacEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry containing objects describing attributes of each
MAC entry, extending the information in ifEntry.
An entry in this table exists for each ifEntry with an
ifType of docsCableMaclayer(127)."
INDEX { ifIndex }
::= { docsIfCmtsMacTable 1 }
DocsIfCmtsMacEntry ::= SEQUENCE {
docsIfCmtsCapabilities BITS,
docsIfCmtsSyncInterval Integer32,
docsIfCmtsUcdInterval Integer32,
docsIfCmtsMaxServiceIds Integer32,
docsIfCmtsInsertionInterval TimeTicks, -- Obsolete
docsIfCmtsInvitedRangingAttempts Integer32,
docsIfCmtsInsertInterval TimeInterval
}
SYNTAX BITS {
atmCells(0),
concatenation(1)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Identifies the capabilities of the CMTS MAC
implementation at this interface. Note that packet
transmission is always supported. Therefore, there
is no specific bit required to explicitely indicate
this capability."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Chapter 6."
::= { docsIfCmtsMacEntry 1 }
SYNTAX Integer32 (1..200)
UNITS "Milliseconds"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The interval between CMTS transmission of successive SYNC
messages at this interface."
REFERENCE
"DOCSIS Radio Frequency Interface Specification,
Section 6.5 and Appendix B."
::= { docsIfCmtsMacEntry 2 }
SYNTAX Integer32 (1..2000)
UNITS "Milliseconds"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The interval between CMTS transmission of successive
Upstream Channel Descriptor messages for each upstream
channel at this interface."
REFERENCE
"DOCSIS Radio Frequency Interface Specification,
Section 6.5 and Appendix B."
::= { docsIfCmtsMacEntry 3 }
SYNTAX Integer32 (1..16383)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The maximum number of service IDs that may be
simultaneously active."
::= { docsIfCmtsMacEntry 4 }
-- This object has been obsoleted and replaced by
-- docsIfCmtsInsertInterval to fix a SYNTAX typing problem. New
-- implementations of this MIB should use that object instead.
SYNTAX TimeTicks
MAX-ACCESS read-write
STATUS obsolete
DESCRIPTION
"The amount of time to elapse between each broadcast
station maintenance grant. Broadcast station maintenance
grants are used to allow new cable modems to join the
network. Zero indicates that a vendor-specific algorithm
is used instead of a fixed time. Maximum amount of time
permitted by the specification is 2 seconds."
REFERENCE
"DOCSIS Radio Frequency Interface Specification,
Appendix B, Ranging Interval."
::= { docsIfCmtsMacEntry 5 }
SYNTAX Integer32 (0..1024)
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The maximum number of attempts to make on invitations
for ranging requests. A value of zero means the system
should attempt to range forever."
REFERENCE
"DOCSIS Radio Frequency Interface specification, Section 7.2.5 and Appendix B."
::= { docsIfCmtsMacEntry 6 }
SYNTAX TimeInterval
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The amount of time to elapse between each broadcast
station maintenance grant. Broadcast station maintenance
grants are used to allow new cable modems to join the
network. Zero indicates that a vendor-specific algorithm
is used instead of a fixed time. Maximum amount of time
permitted by the specification is 2 seconds."
REFERENCE
"DOCSIS Radio Frequency Interface Specification,
Appendix B."
::= { docsIfCmtsMacEntry 7 }
--
--
-- CMTS status table.
--
SYNTAX SEQUENCE OF DocsIfCmtsStatusEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"For the MAC layer, this group maintains a number of
status objects and counters."
::= { docsIfCmtsObjects 2 }
SYNTAX DocsIfCmtsStatusEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Status entry for a single MAC layer.
An entry in this table exists for each ifEntry with an
ifType of docsCableMaclayer(127)."
INDEX { ifIndex }
::= { docsIfCmtsStatusTable 1 }
DocsIfCmtsStatusEntry ::= SEQUENCE {
docsIfCmtsStatusInvalidRangeReqs Counter32,
docsIfCmtsStatusRangingAborteds Counter32,
docsIfCmtsStatusInvalidRegReqs Counter32,
docsIfCmtsStatusFailedRegReqs Counter32,
docsIfCmtsStatusInvalidDataReqs Counter32,
docsIfCmtsStatusT5Timeouts Counter32
}
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object counts invalid RNG-REQ messages received on
this interface."
::= { docsIfCmtsStatusEntry 1 }
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object counts ranging attempts that were explicitely
aborted by the CMTS."
::= { docsIfCmtsStatusEntry 2 }
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object counts invalid REG-REQ messages received on
this interface."
::= { docsIfCmtsStatusEntry 3 }
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object counts failed registration attempts, i.e.,
authentication failures and class of service failures,
on this interface."
::= { docsIfCmtsStatusEntry 4 }
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object counts invalid data request messages received on this interface."
::= { docsIfCmtsStatusEntry 5 }
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object counts the number of times counter T5
expired on this interface."
::= { docsIfCmtsStatusEntry 6 }
--
-- CM status table (within CMTS).
-- This table is implemented only at the CMTS.
-- It contains per CM status information available in the CMTS.
--
SYNTAX SEQUENCE OF DocsIfCmtsCmStatusEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A set of objects in the CMTS, maintained for each
Cable Modem connected to this CMTS."
::= { docsIfCmtsObjects 3 }
SYNTAX DocsIfCmtsCmStatusEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Status information for a single Cable Modem.
An entry in this table exists for each Cable Modem
that is connected to the CMTS implementing this table."
INDEX { docsIfCmtsCmStatusIndex }
::= { docsIfCmtsCmStatusTable 1 }
DocsIfCmtsCmStatusEntry ::= SEQUENCE {
docsIfCmtsCmStatusIndex Integer32,
docsIfCmtsCmStatusMacAddress MacAddress,
docsIfCmtsCmStatusIpAddress IpAddress,
docsIfCmtsCmStatusDownChannelIfIndex InterfaceIndexOrZero,
docsIfCmtsCmStatusUpChannelIfIndex InterfaceIndexOrZero,
docsIfCmtsCmStatusRxPower TenthdBmV,
docsIfCmtsCmStatusTimingOffset Unsigned32,
docsIfCmtsCmStatusEqualizationData OCTET STRING,
docsIfCmtsCmStatusValue INTEGER,
docsIfCmtsCmStatusUnerroreds Counter32,
docsIfCmtsCmStatusCorrecteds Counter32,
docsIfCmtsCmStatusUncorrectables Counter32,
docsIfCmtsCmStatusSignalNoise TenthdB,
docsIfCmtsCmStatusMicroreflections Integer32
}
SYNTAX Integer32 (1..2147483647)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Index value to uniquely identify an entry in this table.
For an individual Cable Modem, this index value should
not change during CMTS uptime."
::= { docsIfCmtsCmStatusEntry 1 }
SYNTAX MacAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"MAC address of this Cable Modem. If the Cable Modem has
multiple MAC addresses, this is the MAC address associated
with the Cable interface."
::= { docsIfCmtsCmStatusEntry 2 }
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"IP address of this Cable Modem. If the Cable Modem has no
IP address assigned, or the IP address is unknown, this
object returns a value of 0.0.0.0. If the Cable Modem has
multiple IP addresses, this object returns the IP address
associated with the Cable interface."
::= { docsIfCmtsCmStatusEntry 3 }
SYNTAX InterfaceIndexOrZero
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"IfIndex of the downstream channel this CM is connected
to. If the downstream channel is unknown, this object
returns a value of zero."
::= { docsIfCmtsCmStatusEntry 4 }
SYNTAX InterfaceIndexOrZero
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"IfIndex of the upstream channel this CM is connected
to. If the upstream channel is unknown, this object
returns a value of zero."
::= { docsIfCmtsCmStatusEntry 5 }
SYNTAX TenthdBmV
UNITS "dBmV"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The receive power as percieved for upstream data from
this Cable Modem.
If the receive power is unknown, this object returns
a value of zero."
REFERENCE
"DOCSIS Radio Frequency Interface Specification,
Table 4-13."
::= { docsIfCmtsCmStatusEntry 6 }
SYNTAX Unsigned32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A measure of the current round trip time for this CM.
Used for timing of CM upstream transmissions to ensure
synchronized arrivals at the CMTS. Units are in terms
of (6.25 microseconds/64). Returns zero if the value
is unknown."
REFERENCE
"DOCSIS Radio Frequency Interface Specification,
Section 6.5."
::= { docsIfCmtsCmStatusEntry 7 }
SYNTAX OCTET STRING
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Equalization data for this CM. Returns an empty string
if the value is unknown or if there is no equalization
data available or defined."
REFERENCE
"DOCSIS Radio Frequency Interface Specification,
Figure 6-23."
::= { docsIfCmtsCmStatusEntry 8 }
SYNTAX INTEGER {
other(1),
ranging(2),
rangingAborted(3),
rangingComplete(4),
ipComplete(5),
registrationComplete(6),
accessDenied(7)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Current Cable Modem connectivity state, as specified
in the RF Interface Specification. Returned status
information is the CM status as assumed by the CMTS,
and indicates the following events:
other(1)
Any state other than below.
ranging(2)
The CMTS has received an Initial Ranging Request
message from the CM, and the ranging process is not
yet complete.
rangingAborted(3)
The CMTS has sent a Ranging Abort message to the CM.
rangingComplete(4)
The CMTS has sent a Ranging Complete message to the CM.
ipComplete(5)
The CMTS has received a DHCP reply message and forwarded
it to the CM.
registrationComplete(6)
The CMTS has sent a Registration Response mesage to
the CM.
accessDenied(7)
The CMTS has sent a Registration Aborted message
to the CM.
The CMTS only needs to report states it is able to detect."
REFERENCE
"DOCSIS Radio Frequency Interface Specification,
Chapter 7.2."
::= { docsIfCmtsCmStatusEntry 9 }
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Codewords received without error from this Cable Modem."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Section 4.2.3"
::= { docsIfCmtsCmStatusEntry 10 }
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Codewords received with correctable errors from this
Cable Modem."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Section 4.2.3"
::= { docsIfCmtsCmStatusEntry 11 }
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Codewords received with uncorrectable errors from this
Cable Modem."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Section 4.2.3"
::= { docsIfCmtsCmStatusEntry 12 }
SYNTAX TenthdB
UNITS "dB"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Signal/Noise ratio as perceived for upstream data from
this Cable Modem.
If the Signal/Noise is unknown, this object returns
a value of zero."
::= { docsIfCmtsCmStatusEntry 13 }
SYNTAX Integer32 (0..255)
UNITS "dBc"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total microreflections including in-channel response
as perceived on this interface, measured in dBc below
the signal level.
This object is not assumed to return an absolutely
accurate value, but should give a rough indication
of microreflections received on this interface.
It is up to the implementor to provide information
as accurate as possible."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Table 2-1 and 2-2"
::= { docsIfCmtsCmStatusEntry 14 }
--
-- The CMTS Service Table.
--
SYNTAX SEQUENCE OF DocsIfCmtsServiceEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Describes the attributes of upstream service queues
in a Cable Modem Termination System."
::= { docsIfCmtsObjects 4 }
SYNTAX DocsIfCmtsServiceEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Describes the attributes of a single upstream bandwidth
service queue.
Entries in this table exist for each ifEntry with an
ifType of docsCableMaclayer(127), and for each service
queue (Service ID) within this MAC layer.
Entries in this table are created with the creation of
individual Service IDs by the MAC layer and removed
when a Service ID is removed."
INDEX { ifIndex, docsIfCmtsServiceId }
::= { docsIfCmtsServiceTable 1 }
DocsIfCmtsServiceEntry ::= SEQUENCE {
docsIfCmtsServiceId Integer32,
docsIfCmtsServiceCmStatusIndex Integer32,
docsIfCmtsServiceAdminStatus INTEGER,
docsIfCmtsServiceQosProfile Integer32,
docsIfCmtsServiceCreateTime TimeStamp,
docsIfCmtsServiceInOctets Counter32,
docsIfCmtsServiceInPackets Counter32
}
SYNTAX Integer32 (1..16383)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Identifies a service queue for upstream bandwidth. The
attributes of this service queue are shared between the
Cable Modem and the Cable Modem Termination System.
The CMTS allocates upstream bandwidth to this service
queue based on requests from the CM and on the class of
service associated with this queue."
::= { docsIfCmtsServiceEntry 1 }
SYNTAX Integer32 (0..65535)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Pointer to an entry in docsIfCmtsCmStatusTable identifying
the Cable Modem using this Service Queue. If multiple
Cable Modems are using this Service Queue, the value of
this object is zero."
::= { docsIfCmtsServiceEntry 2 }
SYNTAX INTEGER {
enabled(1),
disabled(2),
destroyed(3) }
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"Allows a service class for a particular modem to be
suppressed, (re-)enabled, or deleted altogether."
::= { docsIfCmtsServiceEntry 3 }
SYNTAX Integer32 (0..16383)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The index in docsIfQosProfileTable describing the quality
of service attributes associated with this particular
service. If no associated docsIfQosProfileTable entry
exists, this object returns a value of zero."
::= { docsIfCmtsServiceEntry 4 }
-- SYNTAX TimeTicks
SYNTAX TimeStamp
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of sysUpTime when this entry was created."
::= { docsIfCmtsServiceEntry 5 }
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The cumulative number of Packet Data octets received
on this Service ID. The count does not include the
size of the Cable MAC header"
::= { docsIfCmtsServiceEntry 6 }
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The cumulative number of Packet Data packets received
on this Service ID."
::= { docsIfCmtsServiceEntry 7 }
--
-- The following table provides upstream channel modulation profiles.
-- Entries in this table can be
-- re-used by one or more upstream channels. An upstream channel will
-- have a modulation profile
-- for each value of docsIfModIntervalUsageCode.
--
SYNTAX SEQUENCE OF DocsIfCmtsModulationEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Describes a modulation profile associated with one or more
upstream channels."
::= { docsIfCmtsObjects 5 }
SYNTAX DocsIfCmtsModulationEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Describes a modulation profile for an Interval Usage Code
for one or more upstream channels.
Entries in this table are created by the operator. Initial
default entries may be created at system initialization
time. No individual objects have to be specified in order
to create an entry in this table.
Note that some objects do not have DEFVALs, but do have
calculated defaults and need not be specified during row
creation.
There is no restriction on the changing of values in this
table while their associated rows are active."
INDEX { docsIfCmtsModIndex, docsIfCmtsModIntervalUsageCode }
::= { docsIfCmtsModulationTable 1 }
DocsIfCmtsModulationEntry ::= SEQUENCE {
docsIfCmtsModIndex Integer32,
docsIfCmtsModIntervalUsageCode INTEGER,
docsIfCmtsModControl RowStatus,
docsIfCmtsModType INTEGER,
docsIfCmtsModPreambleLen Integer32,
docsIfCmtsModDifferentialEncoding TruthValue,
docsIfCmtsModFECErrorCorrection Integer32,
docsIfCmtsModFECCodewordLength Integer32,
docsIfCmtsModScramblerSeed Integer32,
docsIfCmtsModMaxBurstSize Integer32,
docsIfCmtsModGuardTimeSize Unsigned32,
docsIfCmtsModLastCodewordShortened TruthValue,
docsIfCmtsModScrambler TruthValue
}
SYNTAX Integer32 (1..2147483647)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An index into the Channel Modulation table representing
a group of Interval Usage Codes, all associated with the
same channel."
::= { docsIfCmtsModulationEntry 1 }
SYNTAX INTEGER {
request(1),
requestData(2),
initialRanging(3),
periodicRanging(4),
shortData(5),
longData(6)
}
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An index into the Channel Modulation table which, when
grouped with other Interval Usage Codes, fully
instantiate all modulation sets for a given upstream
channel."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Table 6-16."
::= { docsIfCmtsModulationEntry 2 }
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Controls and reflects the status of rows in this table."
::= { docsIfCmtsModulationEntry 3 }
SYNTAX INTEGER {
other(1),
qpsk(2),
qam16(3)
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The modulation type used on this channel. Returns
other(1) if the modulation type is neither qpsk or
qam16. See the reference for the modulation profiles
implied by qpsk or qam16. See the conformance object for
write conditions and limitations."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Section 4.2.2."
DEFVAL { qpsk }
::= { docsIfCmtsModulationEntry 4 }
SYNTAX Integer32 (0..1024)
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The preamble length for this modulation profile in bits.
Default value is the minimum needed by the implementation
at the CMTS for the given modulation profile."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Section 4.2.5."
::= { docsIfCmtsModulationEntry 5 }
SYNTAX TruthValue
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Specifies whether or not differential encoding is used
on this channel."
DEFVAL { false }
::= { docsIfCmtsModulationEntry 6 }
SYNTAX Integer32 (0..10)
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The number of correctable errored bytes (t) used in
forward error correction code. The value of 0 indicates
no correction is employed. The number of check bytes
appended will be twice this value."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Section 4.2.3."
DEFVAL { 0 }
::= { docsIfCmtsModulationEntry 7 }
SYNTAX Integer32 (1..255)
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The number of data bytes (k) in the forward error
correction codeword.
This object is not used if docsIfCmtsModFECErrorCorrection
is zero."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Section 4.2.3."
DEFVAL { 32 }
::= { docsIfCmtsModulationEntry 8 }
SYNTAX Integer32 (0..32767)
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The 15 bit seed value for the scrambler polynomial."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Section 4.2.4."
DEFVAL { 0 }
::= { docsIfCmtsModulationEntry 9 }
SYNTAX Integer32 (0..255)
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The maximum number of mini-slots that can be transmitted
during this channel's burst time. Returns zero if the
burst length is bounded by the allocation MAP rather than
this profile.
Default value is 0 except for shortData, where it is 8."
::= { docsIfCmtsModulationEntry 10 }
SYNTAX Unsigned32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of symbol-times which must follow the end of
this channel's burst. Default value is the minimum time
needed by the implementation for this modulation profile."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Section 4.2.7."
::= { docsIfCmtsModulationEntry 11 }
SYNTAX TruthValue
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Indicates if the last FEC codeword is truncated."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Section 4.2.10."
DEFVAL { true }
::= { docsIfCmtsModulationEntry 12 }
SYNTAX TruthValue
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Indicates if the scrambler is employed."
REFERENCE
"DOCSIS Radio Frequency Interface specification,
Section 4.2.4."
DEFVAL { false }
::= { docsIfCmtsModulationEntry 13 }
SYNTAX BITS {
createByManagement(0),
updateByManagement(1),
createByModems(2)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This object specifies permitted methods of creating
entries in docsIfQosProfileTable.
CreateByManagement(0) is set if entries can be created
using SNMP. UpdateByManagement(1) is set if updating
entries using SNMP is permitted. CreateByModems(2)
is set if entries can be created based on information
in REG-REQ MAC messages received from Cable Modems.
Information in this object is only applicable if
docsIfQosProfileTable is implemented as read-create.
Otherwise, this object is implemented as read-only
and returns CreateByModems(2).
Either CreateByManagement(0) or CreateByModems(1)
must be set when writing to this object."
::= { docsIfCmtsObjects 6 }
SYNTAX SEQUENCE OF DocsIfCmtsMacToCmEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This is a table to provide a quick access index into the
docsIfCmtsCmStatusTable. There is exactly one row in this
table for each row in the docsIfCmtsCmStatusTable. In
general, the management station should use this table only
to get a pointer into the docsIfCmtsCmStatusTable (which
corresponds to the CM's RF interface MAC address), and
should not iterate (e.g. GetNext through) this table."
::= { docsIfCmtsObjects 7 }
SYNTAX DocsIfCmtsMacToCmEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A row in the docsIfCmtsMacToCmTable.
An entry in this table exists for each Cable Modem
that is connected to the CMTS implementing this table."
INDEX { docsIfCmtsCmMac }
::= {docsIfCmtsMacToCmTable 1 }
DocsIfCmtsMacToCmEntry ::= SEQUENCE {
docsIfCmtsCmMac MacAddress,
docsIfCmtsCmPtr Integer32
}
SYNTAX MacAddress
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The RF side MAC address for the referenced CM. (E.g. the
interface on the CM that has docsCableMacLayer(127) as
its ifType."
::= { docsIfCmtsMacToCmEntry 1 }
SYNTAX Integer32 (1..2147483647)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"An row index into docsIfCmtsCmStatusTable. When queried
with the correct instance value (e.g. a CM's MAC address),
returns the index in docsIfCmtsCmStatusTable which
represents that CM."
::= { docsIfCmtsMacToCmEntry 2 }
--
-- notification group is for future extension.
--
docsIfNotification OBJECT IDENTIFIER ::= { docsIfMib 2 }
docsIfConformance OBJECT IDENTIFIER ::= { docsIfMib 3 }
docsIfCompliances OBJECT IDENTIFIER ::= { docsIfConformance 1 }
docsIfGroups OBJECT IDENTIFIER ::= { docsIfConformance 2 }
-- compliance statements
STATUS current
DESCRIPTION
"The compliance statement for devices that implement
MCNS/DOCSIS compliant Radio Frequency Interfaces."
-- unconditionally mandatory groups
-- conditionally mandatory group
-- conditionally mandatory group
WRITE-SYNTAX Integer32 (6000000)
MIN-ACCESS read-only
DESCRIPTION
"It is conformant to implement this object as read-only.
In Cable Modems, this object is always implemented as
read-only. The above value is appropriate for cable
plants running under NTSC (National Television
Standards Committee) standards. If DOCSIS is extended to
work with other standard (e.g. European standards), this
object will be modified accordingly."
WRITE-SYNTAX INTEGER {
qam64 (3),
qam256 (4)
}
MIN-ACCESS read-only
DESCRIPTION
"Read-write in Cable Modem Termination Systems;
read-only in Cable Modems."
WRITE-SYNTAX INTEGER {
taps8Increment16(3),
taps16Increment8(4),
taps32Increment4(5),
taps64Increment2(6),
taps128Increment1(7)
}
MIN-ACCESS read-only
DESCRIPTION
"Read-write in Cable Modem Termination Systems;
read-only in Cable Modems."
channel plans (and frequency allocations) this object will be modified accordingly."
"Read-write in Cable Modem Termination Systems;
read-only in Cable Modems."