CASA-CABLE-FLAPLIST-MIB

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Organization: Casa Systems Inc

Last Updated: 2008-09-05

Category: Alarm and Event Management, DOCSIS and Cable, Vendor: Casa Systems

Description: Monitors cable modem flap list events tracking modems that repeatedly range or re-register on Casa Systems CMTS.

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What Is CASA-CABLE-FLAPLIST-MIB?

CASA-CABLE-FLAPLIST-MIB is a Casa Systems enterprise MIB for their CMTS (Cable Modem Termination System) platform that tracks the DOCSIS "flap list," a record of cable modems that repeatedly go offline and re-register, lose synchronization, or re-range, which is a classic indicator of plant/RF problems. Based on its stated purpose, it maintains per-modem flap event counts and timing rather than physical sensor data, functioning as a fault/diagnostic MIB. Its monitoring value is in identifying unstable cable modems and, by extension, unstable segments of the HFC plant, before they escalate into wider outages, an early-warning signal for physical-layer or provisioning problems rather than a report on the CMTS's own hardware health. No specific object names were available in the extracted data for this module, so no dependency detail beyond its general DOCSIS flap-list purpose can be confirmed. It is deployed on Casa Systems CMTS headend equipment in DOCSIS cable operator networks, where CASA-CABLE-FLAPLIST-MIB SNMP monitoring flags unstable cable modems before they escalate into wider outages.

IPNetwork Monitor allows you to monitor SNMP objects defined in CASA-CABLE-FLAPLIST-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

Casa Systems CMTS (cable modem termination system)

Monitoring Examples

No sample objects were provided for this module, so a concrete polling scenario naming specific instance objects cannot be honestly constructed; based on its stated purpose, a realistic use would be periodically reviewing per-modem flap counts and last-flap timestamps to identify modems with recurring ranging or synchronization failures, but the exact object names cannot be verified from the available data.

What Can Be Monitored

per-modem flap event count
flap event timing/history

Imported Objects

From CASA-MIB

casa	MODULE-IDENTITY

From IF-MIB

ifIndex

OBJECT-TYPE

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Integer32
MODULE-IDENTITY
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

DateAndTime
MacAddress
RowStatus
TruthValue

OIDs

OID symbolic	OID numeric	Type	Access	Description
casaMgmt	1.3.6.1.4.1.20858.10
casaFlapListMib	1.3.6.1.4.1.20858.10.11			This is the enterprise MIB Module for CASA systems CMTS.
casaFlapListMIBObjects	1.3.6.1.4.1.20858.10.11.1
casaFlapListGlobal	1.3.6.1.4.1.20858.10.11.1.1
U32 casaFlapInsertionTime	1.3.6.1.4.1.20858.10.11.1.1.1	Unsigned32	read-write	If the Cable Modem continuously send initial ranging request within a fixed time interval ,the Cable Modem will be added to the casaFlapListTable. 0 means no matter the Cable Modem continuously send initial rangeing in any interval, the Cable Modem won't be added to the casaFlapListTable.
U32 casaFlapMissThreshold	1.3.6.1.4.1.20858.10.11.1.1.2	Unsigned32	read-write	When the number of times a Cable Modem does not acknowledge a MAC-layer station maintenance message from a CMTS exceeds this threshold, the Cable Modem will be add to the casaFlapListTable. 0 means no matter how many times the Cable Modem does not acknowledge a MAC-layer station maintenance message from a CMTS, the Cable Modem won't be added to the casaFlapListTable.
U32 casaFlapPowerAdjThreshold	1.3.6.1.4.1.20858.10.11.1.1.3	Unsigned32	read-write	When the power level a Cable Modem send to Cmts after online exceeds this threshold, the Cable Modem will be add to the casaFlapListTable. 0 means no metter how much power level the Cable Modem send to Cmts after online, the Cable Modem won't be added to the casaFlapListTable.
U32 casaFlapListAging	1.3.6.1.4.1.20858.10.11.1.1.4	Unsigned32	read-write	Aging threshold for the CM. Periodically, a process scans through the CM and removes those Cable Modems from casaFlapListTable and casaFlapListTable that have no new detections for a time interval longer than this threshold in minutes.
U32 casaFlapListMaxSize	1.3.6.1.4.1.20858.10.11.1.1.5	Unsigned32	read-write	The maximum number of Cable Modem entries that casaFlapListTable can report.
T/F casaFlapListResetAll	1.3.6.1.4.1.20858.10.11.1.1.6	TruthValue	read-write	If set to 'true', all counter objects for all entries in casaFlapListTable are reset to zero. Reading this object always returns 'false'.
DAT casaFlapListLastResetTime	1.3.6.1.4.1.20858.10.11.1.1.7	DateAndTime	read-only	The last time that all the counters in the casaFlapListTable are reset to 0. The special value of all '00'Hs indicates that the Entries in these tables have never been reset.
T/F casaFlapListClearAll	1.3.6.1.4.1.20858.10.11.1.1.8	TruthValue	read-write	If set to 'true', all entries from the casaFlapListTable are removed. Reading this object always returns 'false'.
DAT casaFlapListLastClearTime	1.3.6.1.4.1.20858.10.11.1.1.9	DateAndTime	read-only	The last time that all the entries in the casaFlapListTable are destroyed. The special value of all '00'Hs indicates that the entries in these tables have never been destroyed.
U32 casaFlapListCheckInterval	1.3.6.1.4.1.20858.10.11.1.1.10	Unsigned32	read-write	Scaning threshold for the casaFlapListTable. Periodically, a process scans through the casaFlapListTable and removes those Cable Modems from casaFlapListTable and casaFlapListTable that have no new detections for a time interval longer than this threshold in minutes.
casaFlapListTable	1.3.6.1.4.1.20858.10.11.1.2		not-accessible	Description.
casaFlapListEntry	1.3.6.1.4.1.20858.10.11.1.2.1		not-accessible	Description.
MAC casaFlapCmMacAddress	1.3.6.1.4.1.20858.10.11.1.2.1.1	MacAddress	read-only	The Cable Modem mac address
U32 casaFlapCmUpstreamIfIndex	1.3.6.1.4.1.20858.10.11.1.2.1.2	Unsigned32	read-only	The upstream channel index for the CM
U32 casaFlapCmDownstreamIfIndex	1.3.6.1.4.1.20858.10.11.1.2.1.3	Unsigned32	read-only	The downstream channel index for the CM
I32 casaFlapCmInsertionFails	1.3.6.1.4.1.20858.10.11.1.2.1.4	Integer32	read-only	The CM total ranging count after CM is added to casaFalpListTable.
U32 casaFlapCmHits	1.3.6.1.4.1.20858.10.11.1.2.1.5	Unsigned32	read-only	The count a Cable Modem acknowledge a MAC-layer station maintenance message after the Cable Modem is added to casaFalpListTable.
U32 casaFlapCmMisses	1.3.6.1.4.1.20858.10.11.1.2.1.6	Unsigned32	read-only	The count a Cable Modem does not acknowledge a MAC-layer station maintenance message after the Cable Modem is added to casaFalpListTable.
I32 casaFlapCmCRCCounts	1.3.6.1.4.1.20858.10.11.1.2.1.7	Integer32	read-only	The CM CRC count after a CM is added to casaFlapListTable
U32 casaFlapCmPowerAdjustments	1.3.6.1.4.1.20858.10.11.1.2.1.8	Unsigned32	read-only	The count Cmts require Cable Modem to adjust power level that more than 2 dB after the Cable Modem is added to casaFalpListTable.
I32 casaFlapCmFlapCounts	1.3.6.1.4.1.20858.10.11.1.2.1.9	Integer32	read-only	The total count that Cable Modem ranging count plus P-ADJ count after the cable modem is added to casaFlapListTable.
DAT casaFlapCmLastFlapTime	1.3.6.1.4.1.20858.10.11.1.2.1.10	DateAndTime	read-only	The last offline time a Cable Modem after added to casaFlapListTable
ROW casaFlapCmFlapRowStatus	1.3.6.1.4.1.20858.10.11.1.2.1.11	RowStatus	read-write	The status of this instance.
casaFlapListGroups	1.3.6.1.4.1.20858.10.11.2
casaFlapListGroup	1.3.6.1.4.1.20858.10.11.2.1			Group of objects implemented in.
casaFlapListCompliances	1.3.6.1.4.1.20858.10.11.3
casaFlapListCompliance	1.3.6.1.4.1.20858.10.11.3.1			The compliance statement of managed objects common for Cable Modem Termination Sytems (CMTS) and Cable Modems (CM).

RFC description

Enterprise MIB for CASA CMTS cable modem fleet management, tracking flapping modems through continuous ranging activity monitoring.

Start monitoring Casa Systems CMTS platforms 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 CASA-CABLE-FLAPLIST-MIB

What Is CASA-CABLE-FLAPLIST-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description