CADANT-CMTS-SPECTRUM-MGMT-MIB

All MIBs › CADANT-CMTS-SPECTRUM-MGMT-MIB

Organization: Arris International Inc.

Last Updated: 2013-04-30

Category: DOCSIS and Cable, Vendor: ARRIS

Description: Manages upstream RF spectrum analysis and dynamic channel assignment on ARRIS/Cadant CMTS for noise mitigation.

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What Is CADANT-CMTS-SPECTRUM-MGMT-MIB?

CADANT-CMTS-SPECTRUM-MGMT-MIB is an ARRIS (formerly Cadant) vendor MIB for the C4 Cable Modem Termination System (CMTS), covering upstream RF spectrum management used in DOCSIS cable broadband access networks. It exposes configuration and state data for spectrum-management groups, including sample period, frequency-hop period, codeword error thresholds, and retry period, plus a per-group enabled/row-status control and a separate state table tracking live spectrum conditions. This MIB is used to monitor the operational health of the CMTS's automatic noise-avoidance mechanism, i.e., whether upstream channel groups are actively hopping away from ingress noise and how often retries or codeword errors are triggering channel changes, which is effectively performance/fault monitoring for the RF plant rather than classic hardware sensors. It depends on and complements DOCSIS-standard upstream channel and RF MIBs (e.g., DOCS-IF-MIB) for the underlying interface and modulation parameters being managed. It is deployed in MSO (cable operator) head-end or hub facilities on ARRIS/Cadant C4 CMTS chassis serving residential and business cable modem subscribers, and network engineers can download the CADANT-CMTS-SPECTRUM-MGMT-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CADANT-CMTS-SPECTRUM-MGMT-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

ARRIS/Cadant C4 CMTS
DOCSIS cable headend equipment

Monitoring Examples

An operator polls cadSpMgtGroupTable entries (indexed by cadSpMgtGroupIndex) to see cadSpMgtGroupSamplePeriod, cadSpMgtGroupHopPeriod, and cadSpMgtGroupCodeword thresholds configured for a spectrum-management group, then cross-references cadSpMgtStateTable (via cadSpMgtStateIndex) to see the group's live operating state. If cadSpMgtGroupRetryPeriod events fire frequently alongside a degraded state, it indicates persistent upstream ingress noise causing repeated frequency hops on that channel group. cadSpMgtNotifications would deliver traps when a spectrum event (e.g., a hop triggered or threshold exceeded) occurs, letting an admin correlate plant noise problems with specific upstream segments without waiting for subscriber complaints.

What Can Be Monitored

spectrum group sample period
frequency hop period
codeword error threshold
retry period
spectrum group enabled state
spectrum group live state

Imported Objects

From CADANT-CMTS-UPCHANNEL-MIB

cadIfUpstreamChannelEntry

OBJECT-TYPE

From CADANT-PRODUCTS-MIB

cadSpectrum

OBJECT-IDENTITY

From DOCS-IF-MIB

TenthdB

From IF-MIB

InterfaceIndex

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Integer32
MODULE-IDENTITY
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

DateAndTime
DisplayString
RowStatus
TEXTUAL-CONVENTION
TruthValue

OIDs

OID symbolic	OID numeric	Type	Access	Description
cadSpMgtMib	1.3.6.1.4.1.4998.1.1.15.4			The MIB module describes the C4 Upstream Spectrum Management
cadSpMgtNotifications	1.3.6.1.4.1.4998.1.1.15.4.1
cadSpMgtObjects	1.3.6.1.4.1.4998.1.1.15.4.2
cadSpMgtGroup	1.3.6.1.4.1.4998.1.1.15.4.2.1
cadSpMgtGroupTable	1.3.6.1.4.1.4998.1.1.15.4.2.1.1		not-accessible	Each entry in this table defines a C4 Upstream Spectrum Management group.
cadSpMgtGroupEntry	1.3.6.1.4.1.4998.1.1.15.4.2.1.1.1		not-accessible	A set of C4 Upstream Spectrum Management group information. Entries in the cadSpMgtGroupTable are created and deleted using the cadSpMgtGroupRowStatus object.
I32 cadSpMgtGroupIndex	1.3.6.1.4.1.4998.1.1.15.4.2.1.1.1.1	Integer32	not-accessible	The index used to identify the Upstream Spectrum Group.
I32 cadSpMgtGroupSamplePeriod	1.3.6.1.4.1.4998.1.1.15.4.2.1.1.1.2	Integer32	read-create	The time (in seconds) between samples used for the degradation and the improvement triggers.
I32 cadSpMgtGroupHopPeriod	1.3.6.1.4.1.4998.1.1.15.4.2.1.1.1.3	Integer32	read-create	The minimum period of time (in seconds) that must pass between successive state transitions.
I32 cadSpMgtGroupCodeword	1.3.6.1.4.1.4998.1.1.15.4.2.1.1.1.4	Integer32	read-create	The minimum number of codewords that must have been transmitted on the upstream channel before the degradation and improvement triggers are considered to be valid.
I32 cadSpMgtGroupRetryPeriod	1.3.6.1.4.1.4998.1.1.15.4.2.1.1.1.5	Integer32	read-create	This object specifies the minimum wait time (in seconds) before the retry is attempted. The retry-period timer controls how quickly the state machine is allowed to retry when transition failure occurred.
T/F cadSpMgtGroupEnabled	1.3.6.1.4.1.4998.1.1.15.4.2.1.1.1.6	TruthValue	read-create	This object allows for the optional enabling and disabling of a spectrum group.
ROW cadSpMgtGroupRowStatus	1.3.6.1.4.1.4998.1.1.15.4.2.1.1.1.7	RowStatus	read-create	The status of this conceptual row. To create a row in this table, set this object to createAndGo(4). Support of the values includes createAndGo(4) and destroy(6)
cadSpMgtStateTable	1.3.6.1.4.1.4998.1.1.15.4.2.1.2		not-accessible	Each entry in this table defines a state used for C4 Upstream Spectrum Management.
cadSpMgtStateEntry	1.3.6.1.4.1.4998.1.1.15.4.2.1.2.1		not-accessible	A set of Upstream Spectrum Management state information. Entries in the cadSpMgtStateTable are created and deleted using the cadSpMgtStateRowStatus object.
I32 cadSpMgtStateIndex	1.3.6.1.4.1.4998.1.1.15.4.2.1.2.1.1	Integer32	not-accessible	The index used to identify the state in C4 Upstream Spectrum Management.
I32 cadSpMgtStateFrequency	1.3.6.1.4.1.4998.1.1.15.4.2.1.2.1.2	Integer32	read-create	The center of the frequency band for the upstream channel associated with this state.
I32 cadSpMgtStateWidth	1.3.6.1.4.1.4998.1.1.15.4.2.1.2.1.3	Integer32	read-create	The bandwidth for the upstream channel associated with this state.
U32 cadSpMgtStateModulationProfile	1.3.6.1.4.1.4998.1.1.15.4.2.1.2.1.4	Unsigned32	read-create	An entry identical to the docsIfModIndex in the docsIfCmtsModulationTable that describes the upstream channel associated with this state.
ROW cadSpMgtStateRowStatus	1.3.6.1.4.1.4998.1.1.15.4.2.1.2.1.5	RowStatus	read-create	The status of this conceptual row. To create a row in this table, set this object to createAndGo(4). Support of the values includes createAndGo(4) and destroy(6)
cadSpMgtTriggerTable	1.3.6.1.4.1.4998.1.1.15.4.2.1.3		not-accessible	Each entry in this table defines a trigger for C4 Upstream Spectrum Management
cadSpMgtTriggerEntry	1.3.6.1.4.1.4998.1.1.15.4.2.1.3.1		not-accessible	A set of Upstream Spectrum Management trigger information. Entries in the cadSpMgtTriggerTable are created and deleted using the cadSpMgtTriggerRowStatus object.
I32 cadSpMgtTriggerIndex	1.3.6.1.4.1.4998.1.1.15.4.2.1.3.1.1	Integer32	not-accessible	The trigger index used to identify the trigger for each state transition.
SPT cadSpMgtTriggerType	1.3.6.1.4.1.4998.1.1.15.4.2.1.3.1.2	SpTriggerType	read-create	The trigger type.
SPT cadSpMgtTriggerDay	1.3.6.1.4.1.4998.1.1.15.4.2.1.3.1.3	SpTriggerDay	read-create	The trigger day is to specify the reoccurrence of the TOD trigger for a week. The trigger day has the following defined values: 0: Sunday 1: Monday 2: Tuesday 3: Wednesday 4: Thursday 5: Friday 6: Saturday 7: Everyday
SPT cadSpMgtTriggerTOD	1.3.6.1.4.1.4998.1.1.15.4.2.1.3.1.4	SpTimeOfDay	read-create	Time of day to transition to next state, in HH:MM:SS format
I32 cadSpMgtTriggerPeriod	1.3.6.1.4.1.4998.1.1.15.4.2.1.3.1.5	Integer32	read-create	The amount of time that should be loaded into a timer, in seconds, once the state machine has transitioned into the associated current state. When the timer expires, the transition to next state defined in the state machine is executed. This value is an integer between 1 and 604,800 (which covers a period of a week). This object is applicable for trigger type of periodic(2)
U32 cadSpMgtTriggerThres1	1.3.6.1.4.1.4998.1.1.15.4.2.1.3.1.6	Unsigned32	read-create	This object is applicable for trigger type of degradation (3) and improvement (4). For degradation trigger, this is the maximum acceptable percentage of FEC errors (uncorrectable plus correctable). For improvement trigger, this is the minimum acceptable percentage of FEC errors (uncorrectable plus correctable)
U32 cadSpMgtTriggerThres2	1.3.6.1.4.1.4998.1.1.15.4.2.1.3.1.7	Unsigned32	read-create	This object is applicable for trigger type of degradation (3) and improvement (4). For degradation trigger, this is the maximum acceptable percentage of uncorrectable FEC errors. For improvement trigger, this is the minimum acceptable percentage of uncorrectable FEC errors.
TEN cadSpMgtTriggerThres3	1.3.6.1.4.1.4998.1.1.15.4.2.1.3.1.8	TenthdB	read-create	This object is applicable for trigger type of degradation (3) and improvement (4). For degradation trigger, this is the minimum acceptable Signal/Noise ratio (in dB). For improvement trigger, this is the maximum acceptable Signal/Noise ratio (in dB).
ROW cadSpMgtTriggerRowStatus	1.3.6.1.4.1.4998.1.1.15.4.2.1.3.1.9	RowStatus	read-create	The status of this conceptual row. To create a row in this table, set this object to createAndGo(4). Support of the values includes createAndGo(4) and destroy(6)
cadSpMgtStateTransTable	1.3.6.1.4.1.4998.1.1.15.4.2.1.4		not-accessible	Each entry in this table defines the state machine in C4 Upstream Spectrum Management.
cadSpMgtStateTransEntry	1.3.6.1.4.1.4998.1.1.15.4.2.1.4.1		not-accessible
I32 cadSpMgtTransNextState	1.3.6.1.4.1.4998.1.1.15.4.2.1.4.1.1	Integer32	read-create	The index used to identify the next state to which the state machine may transition to as a result of this trigger.
ROW cadSpMgtStateTransRowStatus	1.3.6.1.4.1.4998.1.1.15.4.2.1.4.1.2	RowStatus	read-create	The status of this conceptual row. To create a row in this table, set this object to createAndGo(4). Support of the values includes createAndGo(4) and destroy(6)
cadSpMgtHistoryTable	1.3.6.1.4.1.4998.1.1.15.4.2.1.5		not-accessible	Table of state transition history.
cadSpMgtHistoryEntry	1.3.6.1.4.1.4998.1.1.15.4.2.1.5.1		not-accessible	Entry of state transition history.
NUM cadSpMgtHistoryUpChannelIfIndex	1.3.6.1.4.1.4998.1.1.15.4.2.1.5.1.1	InterfaceIndex	not-accessible	IfIndex of the upstream channel.
DAT cadSpMgtHistoryTime	1.3.6.1.4.1.4998.1.1.15.4.2.1.5.1.2	DateAndTime	not-accessible	The value of this object is the actual clock time when this entry was created.
I32 cadSpMgtHistoryTriggerIndex	1.3.6.1.4.1.4998.1.1.15.4.2.1.5.1.3	Integer32	read-only	The trigger index used to identify the trigger for state transition. A value of 0 indicates a manual trigger.
I32 cadSpMgtHistoryFromStateIndex	1.3.6.1.4.1.4998.1.1.15.4.2.1.5.1.4	Integer32	read-only	The index used to identify the current state.
I32 cadSpMgtHistoryNextStateIndex	1.3.6.1.4.1.4998.1.1.15.4.2.1.5.1.5	Integer32	read-only	The index used to identify the next state to which the state machine may transition to.
I32 cadSpMgtHistoryResultStateIndex	1.3.6.1.4.1.4998.1.1.15.4.2.1.5.1.6	Integer32	read-only	The index used to identify the result state to which the state machine has transitioned to. For a successful state transition request, the value of this object is the same as cadSpMgtHistoryNextState.
TEN cadSpMgtHistorySNR	1.3.6.1.4.1.4998.1.1.15.4.2.1.5.1.7	TenthdB	read-only	This object is the measured Signal/Noise ratio (in dB) for the upstream channel. This object is applicable when the value in cadSpMgtHistoryTriggerIndex defines the trigger of type degradation or improvement.
U32 cadSpMgtHistoryUFecError	1.3.6.1.4.1.4998.1.1.15.4.2.1.5.1.8	Unsigned32	read-only	This object is the measured percentage of uncorrectable FEC errors for the upstream channel. This object is applicable when the value in cadSpMgtHistoryTriggerIndex defines the trigger of type degradation or improvement.
U32 cadSpMgtHistoryFecError	1.3.6.1.4.1.4998.1.1.15.4.2.1.5.1.9	Unsigned32	read-only	This object is the measured percentage of FEC errors (uncorrectable plus correctable) for the upstream channel. This object is applicable when the value in cadSpMgtHistoryTriggerIndex defines the trigger of type degradation or improvement.
I32 cadSpMgtHistorySpareCardId	1.3.6.1.4.1.4998.1.1.15.4.2.1.5.1.10	Integer32	read-only	The cardId of the spare CAM. The value of 0 indicates the CAM is not spared at the time the request is received.
STR cadSpMgtHistoryText	1.3.6.1.4.1.4998.1.1.15.4.2.1.5.1.11	DisplayString	read-only	This object provides a human-readable description of the entry, including all relevant context.
I32 cadSpMgtHistoryGroupId	1.3.6.1.4.1.4998.1.1.15.4.2.1.5.1.12	Integer32	read-only	The Upstream Spectrum Group index associated with the upstream channel.
UNS cadSpMgtHistoryStateChangeCount	1.3.6.1.4.1.4998.1.1.15.4.2.1.5.1.13	Unsigned16	read-only	Provides the count of state changes in the history entry. This object will always increase. It is 16 bits, once it is at 0xffff, the counter will roll over and start from beginning.
U32 cadSpMgtHistorySysUpTime	1.3.6.1.4.1.4998.1.1.15.4.2.1.5.1.14	Unsigned32	read-only	Provides the system up time in the history entry. This object will always increase.
cadSpMgtUpChannelTable	1.3.6.1.4.1.4998.1.1.15.4.2.1.6		not-accessible	This table describes Upstream Frequency Agility attributes of attached upstream channels.
cadSpMgtUpChannelEntry	1.3.6.1.4.1.4998.1.1.15.4.2.1.6.1		not-accessible	The List of Upstream Frequency Agility attributes associated with an upstream channel.
I32 cadSpMgtUpChannelCurrState	1.3.6.1.4.1.4998.1.1.15.4.2.1.6.1.1	Integer32	read-only	The current state as a result of the upstream spectrum group state transition. This object is only applicable if upstream spectrum management is enabled for this upstream channel.
DAT cadSpMgtUpChannelStateTransTime	1.3.6.1.4.1.4998.1.1.15.4.2.1.6.1.2	DateAndTime	read-only	The value of this object is the actual clock time when the current state information in cadIfUpChannelSpGroupCurrState is most recently updated.
cadSpMgtRequests	1.3.6.1.4.1.4998.1.1.15.4.2.2
NUM cadSpMgtRequestUpChannelIfIndex	1.3.6.1.4.1.4998.1.1.15.4.2.2.1	InterfaceIndex	read-write	IfIndex of the upstream channel.
I32 cadSpMgtRequestTriggerIndex	1.3.6.1.4.1.4998.1.1.15.4.2.2.2	Integer32	read-write	The trigger index used to identify the trigger. A value of 0 indicates no trigger is attempted.
I32 cadSpMgtRequestNextState	1.3.6.1.4.1.4998.1.1.15.4.2.2.3	Integer32	read-write	The index used to identify the next state to which the state machine may transition to.
TEN cadSpMgtRequestSNR	1.3.6.1.4.1.4998.1.1.15.4.2.2.4	TenthdB	read-write	This object is the measured Signal/Noise ratio (in dB) for the upstream channel. This object is applicable when the value in cadSpMgtRequestTriggerIndex defines the trigger of type degradation or improvement.
U32 cadSpMgtRequestUFecError	1.3.6.1.4.1.4998.1.1.15.4.2.2.5	Unsigned32	read-write	This object is the measured percentage of uncorrectable FEC errors for the upstream channel. This object is applicable when the value in cadSpMgtRequestTriggerIndex defines the trigger of type degradation or improvement.
U32 cadSpMgtRequestFecError	1.3.6.1.4.1.4998.1.1.15.4.2.2.6	Unsigned32	read-write	This object is the measured percentage of FEC errors (uncorrectable plus correctable) for the upstream channel. This object is applicable when the value in cadSpMgtRequestTriggerIndex defines the trigger of type degradation or improvement.
T/F cadSpMgtRequestCommit	1.3.6.1.4.1.4998.1.1.15.4.2.2.7	TruthValue	read-write	The command to execute the request when set to true(1). The following are reasons for rejecting an SNMP SET to this object: - An operation is commited for a non-existing upstream channel ID or the corresponding ifOperStatus is down(2). - An operation is committed but cadSpMgtRequestNextState is not an existing state index in cadSpMgtStateEntry. - An operation is committed but the value in cadSpMgtRequestTriggerIndex is non-zero and not an existing trigger index in cadSpMgtTriggerEntry. Reading this object always returns false(2).
cadSpMgtConformance	1.3.6.1.4.1.4998.1.1.15.4.3

RFC description

Manages upstream spectrum state transitions and channel allocation on Arris C4 CMTS with dynamic frequency and trigger-based adjustments.

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Download CADANT-CMTS-SPECTRUM-MGMT-MIB

What Is CADANT-CMTS-SPECTRUM-MGMT-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description