RIVERSTONE-CMTS-MIB

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Organization: Riverstone Networks, Inc

Last Updated: 2000-07-08

Category: Riverstone Networks

Description: Handles configuration and subscriber statistics for the cable modem termination system (CMTS) function on Riverstone routers.

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What Is RIVERSTONE-CMTS-MIB?

RIVERSTONE-CMTS-MIB is a Riverstone Networks enterprise MIB for their Cable Modem Termination System (CMTS) modules, the head-end equipment that terminates DOCSIS cable-modem subscriber connections. It defines base configuration objects for CMTS operation -- BPDU and non-IP traffic filtering, MAP length/lead time, initial maintenance interval, and DOCSIS-related concatenation settings -- along with corresponding hit counters. Its monitoring value centers on both configuration correctness and traffic-filtering software status of the CMTS: rsCmtsBaseBpduFilterHits and rsCmtsBaseNonIPFilterHits reveal how much bridge-protocol or non-IP traffic is being filtered from subscriber upstream channels, and MAP/maintenance timing objects help diagnose upstream ranging or contention problems, though it does not expose classic per-subscriber hardware sensors. It is a Riverstone-proprietary enterprise MIB modeling DOCSIS CMTS concepts, so it is conceptually dependent on the DOCSIS cable-modem specifications even though it does not import a separate IETF DOCSIS MIB directly. It would be deployed on Riverstone Networks CMTS line cards/chassis used by cable operators to provide broadband internet access over HFC (hybrid fiber-coax) cable plant. Engineers can download the RIVERSTONE-CMTS-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in RIVERSTONE-CMTS-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

Riverstone Networks CMTS (cable modem termination system) modules

Monitoring Examples

An operator would poll rsCmtsBaseTable/rsCmtsBaseEntry for rsCmtsBaseBpduFilterHits and rsCmtsBaseNonIPFilterHits to see how much unwanted traffic is being dropped from the upstream, and check rsCmtsBaseMapLength/rsCmtsBaseMapLeadTime alongside rsCmtsBaseInitMaintLength; unusually high filter-hit counts or a growing initial-maintenance interval could indicate misbehaving cable modems or upstream contention on that CMTS module.

What Can Be Monitored

BPDU filter hit count
non-IP filter hit count
MAP length/lead time
initial maintenance interval
DOCSIS concatenation configuration

Imported Objects

From DOCS-IF-MIB

docsIfCmtsModIndex	OBJECT-TYPE
docsIfCmtsModIntervalUsageCode	OBJECT-TYPE

From IF-MIB

ifIndex

OBJECT-TYPE

From RSTONE-SMI-MIB

riverstoneMibs

OBJECT-IDENTITY

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Integer32
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

DisplayString
TEXTUAL-CONVENTION
TruthValue

How to Use in IPNetwork Monitor

Example using rsCmtsBaseBpduFilterHits OID:

Select a Riverstone Networks CMTS (cable modem termination system) module (DOCSIS traffic filtering/config) as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type rsCmtsBaseBpduFilterHits into the Find box to locate it in the OID tree, selecting the specific row/instance you want to monitor since this is a table column, then select it and click OK. Counts number of BPDU filter hits on the headend. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is a Counter32-type OID, Value bounds is the most useful condition here — trigger an alert if the counter increases sharply between polls relative to its normal baseline, since an unexpected spike often reflects a real change in traffic or activity. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
rsCmtsMib	1.3.6.1.4.1.5567.2.11			This mib module defines the Riverstone Networks enterpise MIB for CMTS modules. http://www.riverstonenet.com/products. Copyright (C) Riverstone Networks, Inc 2000
rsCmtsBaseTable	1.3.6.1.4.1.5567.2.11.1		not-accessible	CMTS Base table settable parameters.
rsCmtsBaseEntry	1.3.6.1.4.1.5567.2.11.1.1		not-accessible	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).
T/F rsCmtsBaseBpduFilter	1.3.6.1.4.1.5567.2.11.1.1.2	TruthValue	read-write	Indicates whether we do BPDU filtering on the headend.
C32 rsCmtsBaseBpduFilterHitsEx	1.3.6.1.4.1.5567.2.11.1.1.3	Counter32	read-only	Counts number of BPDU filter hits on the headend.
T/F rsCmtsBaseNonIPFilter	1.3.6.1.4.1.5567.2.11.1.1.4	TruthValue	read-write	Indicates whether we do non-IP filtering on the headend.
C32 rsCmtsBaseNonIPFilterHits	1.3.6.1.4.1.5567.2.11.1.1.5	Counter32	read-only	Counts number of non-IP filter hits on the headend.
I32 rsCmtsBaseMapLength	1.3.6.1.4.1.5567.2.11.1.1.6	Integer32	read-write	Length of the generated maps in microseconds.
I32 rsCmtsBaseMapLeadTime	1.3.6.1.4.1.5567.2.11.1.1.7	Integer32	read-write	The amount of time between when we send a map and its effective start time in microseconds.
I32 rsCmtsBaseInitMaintLength	1.3.6.1.4.1.5567.2.11.1.1.8	Integer32	read-write	The length of the initial maintenance interval in microseconds.
I32 rsCmtsBase3137Config1	1.3.6.1.4.1.5567.2.11.1.1.9	Integer32	read-write	3137 configuration register 1.
I32 rsCmtsBase3137Config2	1.3.6.1.4.1.5567.2.11.1.1.10	Integer32	read-write	3137 configuration register 2.
T/F rsCmtsBaseConcatenation	1.3.6.1.4.1.5567.2.11.1.1.11	TruthValue	read-write	Indicates whether we do Concatenation on the headend.
T/F rsCmtsBaseBpiHwAssist	1.3.6.1.4.1.5567.2.11.1.1.12	TruthValue	read-write	Indicates whether we do key generation in hardware.
STR rsCmtsBaseGenericCmd	1.3.6.1.4.1.5567.2.11.1.1.13	DisplayString	read-write	A generic command to be applied to the active or startup configuration. The string is not to exceed 255 alpha-numeric characters. To write or check the status of the command, use the variable rsCmtsBaseGenericCmdStatus.
RSC rsCmtsBaseGenericCmdStatus	1.3.6.1.4.1.5567.2.11.1.1.14	RsCmtsCmdStatus	read-write	This variable is used to write the command in rsCmtsBaseGenericCmd to either the active or startup configuration file. It is also useful to determine if the command is written successfully. These are the codes of the status: undefined(0) -- default value active(1) -- write to active configuration startup(2) -- write to startup configuration process(3) -- processing request success(4) -- write succeeded failed(5) -- write failed
I32 rsCmtsBaseUccRetryInterval	1.3.6.1.4.1.5567.2.11.1.1.15	Integer32	read-write	Interval in milliseconds between successive UCC requests.
I32 rsCmtsBaseUccRetries	1.3.6.1.4.1.5567.2.11.1.1.16	Integer32	read-only	Number of UCC request retries before timing out.
rsCmtsUpstreamTable	1.3.6.1.4.1.5567.2.11.2		not-accessible	CMTS Upstream table configurable parameters.
rsCmtsUpstreamEntry	1.3.6.1.4.1.5567.2.11.2.1		not-accessible	An entry containing objects describing attributes of each Upstream entry, extending the information in ifEntry.
I32 rsCmtsUpstreamNominalRxPower	1.3.6.1.4.1.5567.2.11.2.1.1	Integer32	read-write	The value indicates the nominal, receive power (indBmV) of each upstream RF port.
T/F rsCmtsUpstreamState	1.3.6.1.4.1.5567.2.11.2.1.2	TruthValue	read-write	Indicates that the given upstream port is operational.
T/F rsCmtsUpstreamPolicing	1.3.6.1.4.1.5567.2.11.2.1.3	TruthValue	read-write	Indicates if we are doing upstream traffic policing.
I32 rsCmtsUpstreamRangeInterval	1.3.6.1.4.1.5567.2.11.2.1.4	Integer32	read-write	Indicates the Invited (Periodic) Ranging Intervals as input to the Bandwidth Allocator algorithm.
I32 rsCmtsUpstreamRangeRetryInterval	1.3.6.1.4.1.5567.2.11.2.1.5	Integer32	read-write	Indicates the Invited (Periodic) Ranging Retry Intervals as input to the Bandwidth Allocator algorithm.
I32 rsCmtsUpstreamPowerThreshold	1.3.6.1.4.1.5567.2.11.2.1.6	Integer32	read-write	Indicates the Power Threshold for the upstream port.
T/F rsCmtsUpstreamPowerAdjust	1.3.6.1.4.1.5567.2.11.2.1.7	TruthValue	read-write	Indicates whether we override upstream power adjustments performed by the CMTS to the CMs. If set the 'true', all RNG-Resp messages will be transmitted with ZERO power adjustment, regardless of received upstream power levels.
T/F rsCmtsUpstreamTimingAdjust	1.3.6.1.4.1.5567.2.11.2.1.8	TruthValue	read-write	Indicates whether we override upstream timing adjustments performed by the CMTS to the CMs. If set the 'true', all RNG-Resp messages will be transmitted with ZERO timing adjustment, regardless of received upstream timing.
T/F rsCmtsUpstreamFreqencyAdjust	1.3.6.1.4.1.5567.2.11.2.1.9	TruthValue	read-write	Indicates whether we override upstream frequency adjustments performed by the CMTS to the CMs. If set the 'true', all RNG-Resp messages will be transmitted with ZERO frequency adjustment, regardless of received upstream frequency levels.
T/F rsCmtsUpstreamTXCoefficients	1.3.6.1.4.1.5567.2.11.2.1.10	TruthValue	read-write	Indicates whether we omit the equalization coefficients for this upstream channel.
T/F rsCmtsUpstreamForceContinue	1.3.6.1.4.1.5567.2.11.2.1.11	TruthValue	read-write	Indicates whether we force all RNG-Resp messages to issue a 'Continue' Ranging Status indefinitely.
T/F rsCmtsUpstreamQosConfirm	1.3.6.1.4.1.5567.2.11.2.1.12	TruthValue	read-write	Indicates whether we would like to confirm the requested QoS parameters for this upstream during registration.
I32 rsCmtsUpstreamQosMaxBps	1.3.6.1.4.1.5567.2.11.2.1.13	Integer32	read-write	The maximum number of bits per second of upstream bandwidth that we will allot to modems which request a minimum upstream rate. We use this to control the amount of bandwidth oversubscription.
rsCmtsModulationTable	1.3.6.1.4.1.5567.2.11.3		not-accessible	Describes a modulation profile associated with one or more upstream channels.
rsCmtsModulationEntry	1.3.6.1.4.1.5567.2.11.3.1		not-accessible	Describes a modulation profile for an Interval Usage Code for one or more upstream channels.
I32 rsCmtsModulationUWLength	1.3.6.1.4.1.5567.2.11.3.1.1	Integer32	read-only	Length of unique word pattern, in bytes.
I32 rsCmtsModulationDetectWindow	1.3.6.1.4.1.5567.2.11.3.1.2	Integer32	read-write	Time window around a nominal detection time in which the unique window detector is enabled.
I32 rsCmtsModulationUWMismatch	1.3.6.1.4.1.5567.2.11.3.1.3	Integer32	read-write	Specifies precision of match between unique word pattern and incoming burst by specifying the number of bits which are allowed to NOT match.
I32 rsCmtsModulationEQSymbols	1.3.6.1.4.1.5567.2.11.3.1.4	Integer32	read-write	Equalizer training sequence length, in symbols.
rsCmtsDownstreamTable	1.3.6.1.4.1.5567.2.11.4		not-accessible	CMTS Downstream table settable parameters.
rsCmtsDownstreamEntry	1.3.6.1.4.1.5567.2.11.4.1		not-accessible	An entry containing objects describing attributes of each Downstream entry, extending the information in ifEntry.
T/F rsCmtsDownstreamState	1.3.6.1.4.1.5567.2.11.4.1.1	TruthValue	read-write	Indicates whether the downstream port is enabled.
T/F rsCmtsDownstreamModulation	1.3.6.1.4.1.5567.2.11.4.1.2	TruthValue	read-write	Indicates whether downstream modulation is turned on. When disabled, the downstream transmitter will output a CW, or tonal signal, at the tuned RF frequency.
rsCmtsConformance	1.3.6.1.4.1.5567.2.11.6
rsCmtsGroups	1.3.6.1.4.1.5567.2.11.6.1
rsCmtsBaseGroup	1.3.6.1.4.1.5567.2.11.6.1.1			A collection of objects providing additional configuration and monitoring capabilites of Cable Modem Line Card parameters.
rsCmtsCompliances	1.3.6.1.4.1.5567.2.11.6.2
rsCmtsMibCompliance	1.3.6.1.4.1.5567.2.11.6.2.1			The compliance statement for devices implementing Riverstone extended Cable Modem MIB.

RFC description

Manages cable modem termination system (CMTS) configuration and subscriber statistics on Riverstone routers.

Start monitoring Riverstone Networks CMTS (cable modem termination system) modules (DOCSIS traffic filtering/config) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

Download RIVERSTONE-CMTS-MIB