DOCS-IFEXT2-MIB
AI MIB Summary
The DOCS-IFEXT2-MIB monitors DOCSIS 2.0 Cable Modem (CM) interfaces to enforce SCDMA scheduling constraints, specifically tracking the Maximum Scheduled Codes (MSC) limit that restricts the number of active codes assigned to a single CM. This module provides visibility into upstream channel allocation efficiency and code contention management within DOCSIS 2.0 cable network infrastructure.
This MIB module contains the management objects that enhance DOCSIS 2.0 feature set. It includes SCDMA capability of limiting the number of codes assigned to a CM over the total active codes, referred as Maximum Scheduled Codes (MSC).
Main OID:
docsIfExt2Mib.1.3.6.1.4.1.4491.2.1.5
36
Objects
Active
Status
6
Dependencies
Imported Objects
Objects
36 total| Object Name |
|---|
docsIfExt2MibThis MIB module contains the management objects that enhance
DOCSIS 2.0 feature set.
It includes SCDMA capability of limiting the number of codes
assigned to a CM over the total active codes, referred as
Maximum Scheduled Codes (MSC). MODULE-IDENTITY .1.3.6.1.4.1.4491.2.1.5 |
docsIfExt2Notifications OBJECT IDENTIFIER .1.3.6.1.4.1.4491.2.1.5.0 |
docsIfExt2MibObjects OBJECT IDENTIFIER .1.3.6.1.4.1.4491.2.1.5.1 |
docsIfExt2BaseObjects OBJECT IDENTIFIER .1.3.6.1.4.1.4491.2.1.5.1.1 |
docsIfExt2CmObjects OBJECT IDENTIFIER .1.3.6.1.4.1.4491.2.1.5.1.2 |
docsIfExt2CmMscStatusTableThis table extends the docsIfCmStatusTable to report
the CM MSC status. SEQUENCE OF DocsIfExt2CmMscStatusEntry .1.3.6.1.4.1.4491.2.1.5.1.2.1 |
docsIfExt2CmMscStatusEntryAs an extension of docsIdCmStatusTable this table has
entries for each ifEntry with an ifType of
docsCableMaclayer(127)
This entry is instantiated by the CM only if the
CM is currently in SCDMA mode. DocsIfExt2CmMscStatusEntry .1.3.6.1.4.1.4491.2.1.5.1.2.1.1 |
docsIfExt2CmMscStatusStateIndicates the current state of the Maximum Scheduled Codes
feature on the CM.
channelEnabled(1) S-CDMA Maximum Scheduled Codes
is enabled in the UCD TLV-17.
channelDisabled(2) S-CDMA Maximum Scheduled Codes
is disabled in the UCD TLV-17 or a UCD has been
received that does not contain that TLV.
Active(3) The CM has received a Ranging Response that
contains a non-zero TLV-10
and therefore has MSC activated. This state
overrides the channelEnabled(1) state.
Inactive(4) The CM has received a Ranging Response that
does not contain TLV-10 or has it
set to 0. This state overrides the
channelEnabled(1) state.
Unknown(5) CM has not yet received a UCD to determine
if MSC is enabled or disabled on that channel.ro Enumeration .1.3.6.1.4.1.4491.2.1.5.1.2.1.1.1 |
docsIfExt2CmMscStatusPowerShortfallIndicates the Power Shortfall at the CM, in units of
tenth dB.
The value is provided by the CM and is sent in the RNG-REQ
message. It is internally calculated in units of quarter
dB and is rounded upward for this MIB object to the nearest
tenth dB. A value of zero indicates that the CM has no power
shortfall.ro TenthdB UNITS "TenthdB" .1.3.6.1.4.1.4491.2.1.5.1.2.1.1.2 |
docsIfExt2CmMscStatusCodeRatioIndicates the maximum ratio of number of active codes to
Maximum Scheduled Codes that the CM can support, as
reported in the Ranging Request.ro Unsigned32 ( 2 | 8 | 16 | 32) .1.3.6.1.4.1.4491.2.1.5.1.2.1.1.3 |
docsIfExt2CmMscStatusMaximumScheduledCodesIndicates the Maximum Scheduled Codes in use by the CM.
The value is provided by the CMTS through a TLV value in
the RNG-RSP message. Note that not all values from 4..128
are valid.
A value of zero when docsIfExt2CmMscStatusSate is active(3)
indicates there is no maximum scheduled codes value. This
object should remain at zero when
docsIfExt2CmMscStatusState is not active(3).ro Unsigned32 (0 | 4..128) .1.3.6.1.4.1.4491.2.1.5.1.2.1.1.4 |
docsIfExt2CmMscStatusPowerHeadroomIndicates the Maximum Scheduled Codes Power Headroom in
use by the CM, in units of tenth dB. The value is
provided by the CMTS in units of quarter dB through
TLV-11 in the RNG-RSP message and is rounded upward for
this MIB object to the nearest tenth dB. A value of zero
indicates the CMTS provided no Power Headroom. This
object should remain at zero when
docsIfExt2CmMscStatusState is not active(3).ro TenthdB UNITS "TenthdB" .1.3.6.1.4.1.4491.2.1.5.1.2.1.1.5 |
docsIfExt2CmMscStatusEffectivePowerIndicates the Effective Transmit Power of the CM. This is
the power that would result hypothetically if, in a
spreader-on frame, the CM were to transmit on all active
codes with 64QAM modulation. This object should be equal
to docsIfCmStatusTxPower when docsIfExt2CmMscStatusState
is not active(3).ro TenthdBmV UNITS "TenthdBmV" .1.3.6.1.4.1.4491.2.1.5.1.2.1.1.6 |
docsIfExt2CmMscStatusIUC2ControlThe CM usage of IUC2 when MSC is enabled:
noIUC2(1): CM usage of IUC2 is prohibited
limitedIUC2(2): CM is allowed to use IUC2 as long as
the CM does not exceed MSC
freeIUC2(3): CM is allowed to use IUC2 without regard
for MSC.
With limitedIUC2(2), there may be cases where a CM cannot
ensure that the use of IUC2 would not exceed MSC. In these
cases, the CM MUST NOT use IUC2.rw Enumeration .1.3.6.1.4.1.4491.2.1.5.1.2.1.1.7 |
docsIfExt2CmtsObjects OBJECT IDENTIFIER .1.3.6.1.4.1.4491.2.1.5.1.3 |
docsIfExt2CmtsMscGlobalEnableIndicates the global state of the Maximum Scheduled Code
feature on the CMTS. The value true(1) indicates that this
feature can be enabled on individual logical channels on
the CMTS. The value false(2) indicates that the feature is
not in operations on the CMTS. Note that the MIB object
docsIfExt2CmtsUpChannelMscState exists to enable or disable
Maximum Scheduled Codes on a per logical channel basis.rw TruthValue (SNMPv2-TC) .1.3.6.1.4.1.4491.2.1.5.1.3.1 |
docsIfExt2CmtsCmMscStatusTableThis table extends the docsIfCmtsCmStatusTable to report
CM MSC status. SEQUENCE OF DocsIfExt2CmtsCmMscStatusEntry .1.3.6.1.4.1.4491.2.1.5.1.3.2 |
docsIfExt2CmtsCmMscStatusEntryAn entry for MSC CM status report. Only CMs allocated
to SCDMA upstream channels are included in this table. DocsIfExt2CmtsCmMscStatusEntry .1.3.6.1.4.1.4491.2.1.5.1.3.2.1 |
docsIfExt2CmtsCmMscStatusPowerShortfallIndicates the Power Shortfall at the CM, in units of
tenth dB.
The value is provided by the CM and is sent in the
RNG-REQ message. It is internally calculated in units
of quarter dB and is rounded upward for this MIB object
to the nearest tenth dB.
A value of zero indicates that the CM has no power
shortfall.ro TenthdB UNITS "TenthdB" .1.3.6.1.4.1.4491.2.1.5.1.3.2.1.1 |
docsIfExt2CmtsCmMscStatusCodeRatioIndicates the maximum ratio of number of active codes to
Maximum Scheduled Codes that the CM reported in the
Ranging Request.ro Unsigned32 (2 | 8 | 16 | 32) .1.3.6.1.4.1.4491.2.1.5.1.3.2.1.2 |
docsIfExt2CmtsCmMscStatusMaximumScheduledCodesIndicates the Maximum Scheduled Codes value in use by
the CM. The value is provided by the CMTS through a TLV
in the RNG-RSP message. Note that not all values from
4..128 are valid.
A value of zero indicates there is no Maximum Scheduled
Codes, or that the CM does not support the Maximum
Scheduled Codes feature.ro Unsigned32 (0 | 4..128) .1.3.6.1.4.1.4491.2.1.5.1.3.2.1.3 |
docsIfExt2CmtsCmMscStatusPowerHeadroomIndicates the Maximum Scheduled Codes Power Headroom
in use by the CM, in units of tenth dB. The value is
provided by the CMTS in units of quarter dB through a
TLV value in the RNG-RSP message and is rounded upward
for this MIB object to the nearest tenth dB. A value of zero
indicates the CMTS provided no Power Headroom.ro TenthdB UNITS "TenthdB" .1.3.6.1.4.1.4491.2.1.5.1.3.2.1.4 |
docsIfExt2CmtsCmMscStatusMeasuredSNRThe signal to noise ratio perceived for this cable modem
on the upstream logical channel as of the last station
maintenance.ro TenthdB UNITS "TenthdB" .1.3.6.1.4.1.4491.2.1.5.1.3.2.1.5 |
docsIfExt2CmtsCmMscStatusEffectiveSNRThe signal to noise ratio estimated for this cable modem
on the upstream logical channel, referenced to 64QAM
modulation. It is defined as the measured SNR at the
last station maintenance, minus the CM power shortfall,
plus the Power Headroom, minus the constellation gain of
the station maintenance burst.
Note that the value of the object
docsIfCmtsCmStatusSignalNoise will be identical to the
value of this object when Maximum Scheduled Codes
is enabled.ro TenthdB UNITS "TenthdB" .1.3.6.1.4.1.4491.2.1.5.1.3.2.1.6 |
docsIfExt2CmtsUpChannelMscTableThis table extends the docsIfUpstreamChannelTable to report
CM MSC status. SEQUENCE OF DocsIfExt2CmtsUpChannelMscEntry .1.3.6.1.4.1.4491.2.1.5.1.3.3 |
docsIfExt2CmtsUpChannelMscEntryAn entry for MSC upstream status report. Only SCDMA logical
upstream channels (i.e., ifType=docsCableUpstreamChannel(205)
and docsIfUpChannelType=scdma(3)) are included in this table. DocsIfExt2CmtsUpChannelMscEntry .1.3.6.1.4.1.4491.2.1.5.1.3.3.1 |
docsIfExt2CmtsUpChannelMscStateIndicates the state of the Maximum Scheduled Codes feature
for an individual logical channel on the CMTS.
The state will transition automatically from dormant(5) to
ChannelEnabled(1) and vice-versa when the feature is
globally enabled by the object
docsIfExt2CmtsMscGlobalEnable.
channelEnabled(1) S-CDMA Maximum Scheduled Codes
is enabled in the UCD TLV-17.
channelDisabled(2) S-CDMA Maximum Scheduled Codes
is disabled in the UCD TLV-17 or a UCD has been
sent that does not contain that TLV.
Dormant(3) The CMTS channel is being set to
channelEnabled(2) but MSC is globally disabled
(docsIfExt2CmtsMscGlobalEnable is false(2) ).
This value is explicitly read-only.rw Enumeration .1.3.6.1.4.1.4491.2.1.5.1.3.3.1.1 |
docsIfExt2CmtsUpChannelMSCTotalCMsTotal number of CMs with docsIfCmtsCmStatusValue of
registrationComplete with MSC active.ro Gauge32 .1.3.6.1.4.1.4491.2.1.5.1.3.3.1.2 |
docsIfExt2CmtsUpChannelMSCLimitIUC1Indicates that, in order to prevent
CMs from exceeding MSC, the CMTS will limit the scheduling of
broadcast IUC1 to at most this many SCDMA codes per SCMDA
frame.ro Unsigned32 .1.3.6.1.4.1.4491.2.1.5.1.3.3.1.3 |
docsIfExt2CmtsUpChannelMSCMinimumValueWhen Maximum Scheduled Codes is enabled, instructs the
CMTS to assign cable modems MSC values no less than this value.rw Unsigned32 .1.3.6.1.4.1.4491.2.1.5.1.3.3.1.4 |
docsIfExt2CmtsUpChannelTableThis table extends the docsIfUpstreamChannelTable to report
additional upstream status information. SEQUENCE OF DocsIfExt2CmtsUpChannelEntry .1.3.6.1.4.1.4491.2.1.5.1.3.4 |
docsIfExt2CmtsUpChannelEntryAn entry for upstream status information. DocsIfExt2CmtsUpChannelEntry .1.3.6.1.4.1.4491.2.1.5.1.3.4.1 |
docsIfExt2CmtsUpChannelTotalCMsTotal number of CMs with docsIfCmtsCmStatusValue of
registrationComplete.ro Gauge32 .1.3.6.1.4.1.4491.2.1.5.1.3.4.1.1 |
docsIfExt2Conformance OBJECT IDENTIFIER .1.3.6.1.4.1.4491.2.1.5.2 |
docsIfExt2Compliances OBJECT IDENTIFIER .1.3.6.1.4.1.4491.2.1.5.2.1 |
docsIfExt2Groups OBJECT IDENTIFIER .1.3.6.1.4.1.4491.2.1.5.2.2 |