CISCO-CABLE-SPECTRUM-MIB

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Organization: Cisco Systems, Inc.

Last Updated: 2011-04-08

Category: DOCSIS and Cable

Description: Manages upstream RF spectrum analysis and noise monitoring on Cisco CMTS platforms.

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What Is CISCO-CABLE-SPECTRUM-MIB?

CISCO-CABLE-SPECTRUM-MIB supports Spectrum Management on DOCSIS-compliant Cisco Cable Modem Termination Systems (CMTS), a feature that senses upstream/downstream RF plant impairments and can automatically mitigate them. It exposes data on cable modem 'flapping' (state changes/disconnects), including a flap list with per-modem hit and miss counts, plus objects governing spectrum analysis behavior. Its primary use is fault and performance monitoring of the RF plant: by tracking flap events keyed by modem MAC address and upstream/downstream interface, operators can identify unstable cable modems or plant segments experiencing noise, signal ingress, or other impairments before they cause widespread outages. It is specific to DOCSIS cable technology and works alongside the standard DOCS-IF-MIB, which provides the underlying physical-layer signal quality data this module's flap detection complements. It is deployed on Cisco CMTS head-end equipment in cable broadband access networks, where operators can download the CISCO-CABLE-SPECTRUM-MIB file to load it into their MIB browser for flap monitoring.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-CABLE-SPECTRUM-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

Cisco CMTS (Cable Modem Termination System)

Monitoring Examples

An operator would poll ccsFlapTable, keyed by ccsFlapMacAddr, ccsFlapUpstreamIfIndex, and ccsFlapDownstreamIfIndex, watching ccsFlapHits versus ccsFlapMisses and ccsFlapInsertionTime to spot modems disconnecting and reconnecting repeatedly. A high ccsFlapHits count for modems sharing the same upstream interface, combined with a growing ccsFlapListCurrentSize approaching ccsFlapListMaxSize, would point to an RF plant impairment such as ingress noise on that upstream segment rather than an individual faulty modem.

What Can Be Monitored

cable modem flap events (disconnects/reconnects)
flap hits vs misses per modem
flap list size and aging
upstream/downstream interface impairment indicators
insertion failures into the flap list

Imported Objects

From CISCO-SMI

ciscoMgmt

OBJECT-IDENTITY

From IF-MIB

InterfaceIndex
InterfaceIndexOrZero
ifIndex	OBJECT-TYPE

From SNMPv2-CONF

MODULE-COMPLIANCE
NOTIFICATION-GROUP
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Gauge32
Integer32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

DateAndTime
MacAddress
RowStatus
StorageType
TEXTUAL-CONVENTION
TimeStamp
TruthValue

How to Use in IPNetwork Monitor

Example using ccsFlapListCurrentSize OID:

Select a Cisco CMTS (Cable Modem Termination System) platform 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 ccsFlapListCurrentSize into the Find box to locate it in the OID tree, then select it and click OK. The total number of flapped modem entries (ccsCmFlapEntry) that reported in the ccsCmFlapTable. 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 Gauge32-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 (in modems), 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
U32 ccsCmFlapCrcErrorNum	1.3.6.1.4.1.9.9.114.1.1.11.1.9	Unsigned32	read-only	The number of times the CMTS upstream receiver flagged a packet with a CRC error. If ccsCmFlapCrcErrorNum is high, it indicates the cable upstream may have high noise level. The modem may not be flapping yet but it may be a potential problem. This object can indicate: Intermittent upstream, Laser clipping, or Noise bursts. Laser clipping can happen if the signal power is too high when the upstream electrical signal is converted to an optical signal. When it happens the more input produces less output, until finally there is no more increase in output. This phenomena is called laser clipping. The value of this object can be reset to zero if this entry is removed from the table and then re-added, or if the ccsCmFlapResetNow object was set to true(1). The value of the object ccsCmFlapLastResetTime indicates the last reset time.
DAT ccsCmFlapCreateTime	1.3.6.1.4.1.9.9.114.1.1.11.1.5	DateAndTime	read-only	The time that this entry was added to the table. If an entry is removed and then later re-added, there may be a discontinuity in the counters associated with this entry. This timestamp can be used to detect those discontinuities.
NUM ccsCmFlapDownstreamIfIndex	1.3.6.1.4.1.9.9.114.1.1.11.1.1	InterfaceIndex	not-accessible	The ifIndex of the Cable downstream interface whose ifType is docsCableDownstream(128).
ccsCmFlapEntry	1.3.6.1.4.1.9.9.114.1.1.11.1		not-accessible	List of attributes for an entry in the ccsCmFlapTable. An entry in this table exists for each cable modem that triggered one of our flap detectors.
U32 ccsCmFlapHitNum	1.3.6.1.4.1.9.9.114.1.1.11.1.7	Unsigned32	read-only	The number of times the CMTS receives the Ranging request from the Cable Modem. The CMTS issues a Station Maintenance transmit opportunity at a typical rate of once every 10 seconds and waits for a Ranging request from the Cable Modem. If the CMTS receives a Ranging request then the Hit number will be increased by 1 If the FlapTotal object is high, both Hit and Miss objects are high, and other statistical objects are relatively low then the flapping is probably caused by the modem going up and down. The Hit and Miss objects keep-alive polling statistics. The Hit object should be much greater than the Misses count. The value of this object can be reset to zero if this entry is removed from the table and then re-added, or if the ccsCmFlapResetNow object was set to true(1). The value of the object ccsCmFlapLastResetTime indicates the last reset time.
U32 ccsCmFlapInsertionFailNum	1.3.6.1.4.1.9.9.114.1.1.11.1.6	Unsigned32	read-only	The number of times a Cable Modem registered more frequently than expected. Excessive registration is defined as the presence of a time span between two successive registration cycles which is less than a threshold span (ccsFlapInsertionTime). A Cable Modem may fail the ranging or registration process due to not being able to get an IP address. When the Cable Modem can not finish registration within the insertion time, it retries the process and sends the Initial Maintenance packet again. CMTS will receive the Initial Maintenance packet from the Cable Modem sooner than expected and the Cable Modem is considered a flapping modem. This object may indicate: Intermittent downstream sync loss, or DHCP or modem registration problems. The Flap number (ccsCmFlapTotalNum) will be incremented when this object is incremented. The value of this object can be reset to zero if this entry is removed from the table and then re-added, or if the ccsCmFlapResetNow object was set to true(1). The value of the object ccsCmFlapLastResetTime indicates the last reset time.
DAT ccsCmFlapLastFlapTime	1.3.6.1.4.1.9.9.114.1.1.11.1.4	DateAndTime	read-only	The flap time is set whenever the Cable Modem triggers a flap detector.
DAT ccsCmFlapLastResetTime	1.3.6.1.4.1.9.9.114.1.1.11.1.13	DateAndTime	read-only	The last time that all the statistical objects of this entry are started from zero. There are several ways to restart the the statistical objects from zero. Setting the object ccsCmFlapResetNow or ccsCmFlapResetAll to true via SNMP is one way and and the other way is via command Line Interface. This timestamp can be used to know the last time the statistical objects are started from zero. The special value of all '00'Hs indicates that these statistical objects of this entry in the ccsCmFlapTable have never been reset.
MAC ccsCmFlapMacAddr	1.3.6.1.4.1.9.9.114.1.1.11.1.3	MacAddress	not-accessible	MAC address of the Cable Modem's Cable interface which identifies a flapping Cable Modem.
U32 ccsCmFlapMissNum	1.3.6.1.4.1.9.9.114.1.1.11.1.8	Unsigned32	read-only	The number of times the CMTS misses the Ranging request from the Cable Modem. The CMTS issues a Station Maintenance packet every 10 seconds and waits for a Ranging request from the Cable Modem. If the CMTS misses a Ranging request within 25 msec then the Miss Object will be incremented. If ccsCmFlapTotalNum is high, Hit and Miss are high but ccsCmFlapPowerAdjustmentNum and ccsCmFlapInsertionFailNum are low then the flapping is probably caused by the modem going up and down. Miss object can indicate: Intermittent upstream, Laser clipping, or Noise bursts. Laser clipping can happen if the signal power is too high when the upstream electrical signal is converted to an optical signal. When it happens the more input produces less output, until finally there is no more increase in output. This phenomena is called laser clipping. The value of this object can be reset to zero if this entry is removed from the table and then re-added, or if the ccsCmFlapResetNow object was set to true(1). The value of the object ccsCmFlapLastResetTime indicates the last reset time.
U32 ccsCmFlapPowerAdjustmentNum	1.3.6.1.4.1.9.9.114.1.1.11.1.10	Unsigned32	read-only	The number of times the Cable Modem upstream transmit power is adjusted during station maintenance. When the adjustment is greater than the power adjustment threshold the number will be incremented. The power adjustment threshold is chosen in an implementation-dependent manner The Flap number (ccsCmFlapTotalNum) will be incremented when this object is incremented. If ccsCmFlapTotalNum is high, ccsCmFlapPowerAdjustmentNum is high but the Hit and Miss are low and ccsCmFlapInsertionFailNum are low then the flapping is probably caused by an improper transmit power level setting at the modem end. This object can indicate: Amplifier degradation, Poor connections, or Wind, moisture, or temperature sensitivity. The value of this object can be reset to zero if this entry is removed from the table and then re-added, or if the ccsCmFlapResetNow object was set to true(1). The value of the object ccsCmFlapLastResetTime indicates the last reset time.
T/F ccsCmFlapResetNow	1.3.6.1.4.1.9.9.114.1.1.11.1.12	TruthValue	read-write	Setting this object to true(1) will set the value of certain objects in this table to 0 and does not destroy the entry, so the ccsCmFlapCreateTime will be unchanged. Reading this object always returns false(2).
ROW ccsCmFlapRowStatus	1.3.6.1.4.1.9.9.114.1.1.11.1.14	RowStatus	read-write	Controls and reflects the status of rows in this table. When a cable modem triggers a flap detector, if an entry does not already exist for this cable modem, an entry will be created in this table. The new instance of this object will be set to active(1). All flapping modems have the status of active(1). Active entries are removed from the table after they have not triggered any additional flap detectors for the period of time defined in ccsFlapAging. Alternatively, setting this instance to destroy(6) will remove the entry immediately. createAndGo(4) and createAndWait(5) are not supported.
ccsCmFlapTable	1.3.6.1.4.1.9.9.114.1.1.11		not-accessible	This table keeps the records of modem state changes, so it can be used to identify the problematic cable modems. An entry per modem is added to the table automatically by the system when it detects any state changes to the modem. Therefore, it can be deleted but can not be added by the management system.
U32 ccsCmFlapTotalNum	1.3.6.1.4.1.9.9.114.1.1.11.1.11	Unsigned32	read-only	Whenever the Cable Modem passes flap detection, then the flap number is increased. There are 3 flap detectors defined: (1) When ccsCmFlapInsertionFailNum is increased the Flap number will be increased. (2) When the CMTS receives a Miss followed by a Hit then the Flap number will be increased. (3) When ccsCmFlapPowerAdjustmentNum is increased the Flap number will be increased. The value of this object can be reset to zero if this entry is removed from the table and then re-added, or if the ccsCmFlapResetNow object was set to true(1). The value of the object ccsCmFlapLastResetTime indicates the last reset time.
NUM ccsCmFlapUpstreamIfIndex	1.3.6.1.4.1.9.9.114.1.1.11.1.2	InterfaceIndex	not-accessible	The ifIndex of the Cable upstream interface whose ifType is docsCableUpstream(129). The CMTS detects a flapping Cable Modem from its Cable upstream interface.
ccsCompliance	1.3.6.1.4.1.9.9.114.3.1.1			The compliance statement for devices that implement DOCSIS-compliant Radio Frequency Interfaces and Spectrum Management features.
ccsCompliance2	1.3.6.1.4.1.9.9.114.3.1.2			The compliance statement for devices that implement DOCSIS- compliant Radio Frequency Interfaces and Spectrum Management features. This compliance is deprecated and replaced by ccsCompliance3.
ccsCompliance3	1.3.6.1.4.1.9.9.114.3.1.3			The compliance statement for devices that implement DOCSIS- compliant Radio Frequency Interfaces and Spectrum Management features.
ccsCompliance4	1.3.6.1.4.1.9.9.114.3.1.4			The compliance statement for devices that implement DOCSIS- compliant Radio Frequency Interfaces and Spectrum Management features.
ccsCompliance5	1.3.6.1.4.1.9.9.114.3.1.5			The compliance statement for devices that implement DOCSIS- compliant Radio Frequency Interfaces and Spectrum Management features.
ccsCompliance6	1.3.6.1.4.1.9.9.114.3.1.6			The compliance statement for devices that implement DOCSIS- compliant Radio Frequency Interfaces and Spectrum Management features.
ccsCompliance7	1.3.6.1.4.1.9.9.114.3.1.7			The compliance statement for devices that implement DOCSIS- compliant Radio Frequency Interfaces and Spectrum Management features.
ccsConfigObjects	1.3.6.1.4.1.9.9.114.1.3
U32 ccsFiberNodeNumber	1.3.6.1.4.1.9.9.114.1.2.5.1.1	Unsigned32	not-accessible	The fiber-node number. The value of the object is same as the value of ccsUpSpecMgmtSharedSpectrum except value 0.
NUM ccsFiberNodeUpstreamIfIndex	1.3.6.1.4.1.9.9.114.1.2.5.1.2	InterfaceIndex	not-accessible	The ifIndex of the Cable upstream interface belonging to this Spectrum Group. The value of the corresponding instance of ifType is 'docsCableUpstream(129)'.
ROW ccsFiberNodeUpstreamRowStatus	1.3.6.1.4.1.9.9.114.1.2.5.1.4	RowStatus	read-create	The status for this conceptual row. This object is used for creating/deleting entries in ccsUpInFiberNodeTable.
STO ccsFiberNodeUpstreamStorage	1.3.6.1.4.1.9.9.114.1.2.5.1.3	StorageType	read-create	The storage type for this conceptual row.
I32 ccsFlapAging	1.3.6.1.4.1.9.9.114.1.1.3	Integer32	read-write	The flap entry aging threshold. Periodically, the aging process scans through the flap list and removes the cable modems that have not flapped for that many minutes.
T/F ccsFlapClearAll	1.3.6.1.4.1.9.9.114.1.1.9	TruthValue	read-write	Setting this object to true(1) removes all cable modems from flap-list and all the entries in the ccsFlapTable are destroyed. If a modem keeps flapping, the modem will be added again into the flap list and a new entry in the ccsFlapTable will be created. The newly created entry for that modem will have new value of ccsFlapCreateTime and all the statistical objects will be started from zero. Reading this object always returns false(2).
U32 ccsFlapCrcErrorNum	1.3.6.1.4.1.9.9.114.1.1.5.1.16	Unsigned32	read-only	The number of times the CMTS upstream receiver flagged a packet with a CRC error. If ccsFlapCrcErrorNum is high, it indicates the cable upstream may have high noise level. The modem may not be flapping yet but it may be a potential problem. This object can indicate: Intermittent upstream, Laser clipping, or Noise bursts. Laser clipping can happen if the signal power is too high when the upstream electrical signal is converted to an optical signal. When it happens the more input produces less output, until finally there is no more increase in output. This phenomena is called laser clipping. This object is going to replace the object ccsFlapCrcErrors and the value of this object can be reset to zero if this entry is removed from the table and then re-added, or if a user resets all the statistical objects for this entry. The value of the object ccsFlapLastResetTime indicates the last reset time.
C32 ccsFlapCrcErrors	1.3.6.1.4.1.9.9.114.1.1.5.1.7	Counter32	read-only	The number of times the CMTS upstream receiver flagged a packet with a CRC error. If ccsFlapCrcErrors is high, it indicates the cable upstream may have high noise level. The modem may not be flapping yet but it may be a potential problem. This count can indicate: Intermittent upstream, Laser clipping, or Noise bursts. Laser clipping can happen if the signal power is too high when the upstream electrical signal is converted to an optical signal. When it happens the more input produces less output, until finally there is no more increase in output. This phenomena is called laser clipping. Discontinuites in the value of this counter can occur if this entry is removed from the table and then re-added, and are indicated by a change in the value of ccsFlapCreateTime.
DAT ccsFlapCreateTime	1.3.6.1.4.1.9.9.114.1.1.5.1.11	DateAndTime	read-only	The time that this entry was added to the table. If an entry is removed and then later re-added, there may be a discontinuity in the counters associated with this entry. This timestamp can be used to detect those discontinuities.
NUM ccsFlapDownstreamIfIndex	1.3.6.1.4.1.9.9.114.1.1.5.1.3	InterfaceIndex	read-only	The ifIndex of the Cable downstream interface whose ifType is docsCableDownstream(128).
ccsFlapEntry	1.3.6.1.4.1.9.9.114.1.1.5.1		not-accessible	List of attributes for an entry in the ccsFlapTable. An entry in this table exists for each cable modem that triggered one of our flap detectors.
ccsFlapGroup	1.3.6.1.4.1.9.9.114.3.2.1			Group of objects implemented in CMTS providing Flap List information. This object group has been deprecated and replaced by ccsFlapGroupRev1.
ccsFlapGroupRev1	1.3.6.1.4.1.9.9.114.3.2.5			Group of objects implemented in CMTS providing Flap List information. This object group has been deprecated and replaced by ccsFlapGroupRev2.
ccsFlapGroupRev2	1.3.6.1.4.1.9.9.114.3.2.7			Group of objects implemented in CMTS providing Flap List information.
U32 ccsFlapHitNum	1.3.6.1.4.1.9.9.114.1.1.5.1.14	Unsigned32	read-only	The number of times the CMTS receives the Ranging request from the Cable Modem. The CMTS issues a Station Maintenance transmit opportunity at a typical rate of once every 10 seconds and waits for a Ranging request from the Cable Modem. If the CMTS receives a Ranging request then the Hit number will be increased by 1 If the FlapTotal object is high, both Hit and Miss objects are high, and other statistical objects are relatively low then the flapping is probably caused by the modem going up and down. The Hit and Miss objects keep-alive polling statistics. The Hit object should be much greater than the Misses count. This object is going to replace the object ccsFlapHits and the value of this object can be reset to zero if this entry is removed from the table and then re-added, or if an user resets all the statistical objects for this entry. The value of the object ccsFlapLastResetTime indicates the last reset time.
C32 ccsFlapHits	1.3.6.1.4.1.9.9.114.1.1.5.1.5	Counter32	read-only	The number of times the CMTS receives the Ranging request from the Cable Modem. The CMTS issues a Station Maintenance transmit opportunity at a typical rate of once every 10 seconds and waits for a Ranging request from the Cable Modem.If the CMTS receives a Ranging request then the Hit count will be increased by 1 If the FlapTotal count is high,both Hits and Misses counts are high, and other counters are relatively low then the flapping is probably caused by the modem going up and down. The Hits and Misses counts are keep-alive polling statistics. The Hits count should be much greater than the Misses count Discontinuites in the value of this counter can occur if this entry is removed from the table and then re-added, and are indicated by a change in the value of ccsFlapCreateTime.
U32 ccsFlapInsertionFailNum	1.3.6.1.4.1.9.9.114.1.1.5.1.13	Unsigned32	read-only	The number of times a Cable Modem registered more frequently than expected. Excessive registration is defined as the presence of a time span between two successive registration cycles which is less than a threshold span (ccsFlapInsertionTime). A Cable Modem may fail the ranging or registration process due to not being able to get an IP address. When the Cable Modem can not finish registration within the insertion time, it retries the process and sends the Initial Maintenance packet again. CMTS will receive the Initial Maintenance packet from the Cable Modem sooner than expected and the Cable Modem is considered a flapping modem. This object may indicate: Intermittent downstream sync loss, or DHCP or modem registration problems. The Flap number (ccsFlapTotalNum) will be incremented when this object is incremented. This object is going to replace the object ccsFlapInsertionFails and the value of this object can be reset to zero if this entry is removed from the table and then re-added, or if a user resets all the statistical objects for this entry. The value of the object ccsFlapLastResetTime indicates the last reset time.
C32 ccsFlapInsertionFails	1.3.6.1.4.1.9.9.114.1.1.5.1.4	Counter32	read-only	The number of times a Cable Modem registered more frequently than expected. Excessive registration is defined as the presence of a time span between two successive registration cycles which is less than a threshold span (ccsFlapInsertionTime). A Cable Modem may fail the ranging or registration process due to not being able to get an IP address. When the Cable Modem can not finish registration within the insertion time, it retries the process and sends the Initial Maintenance packet again. CMTS will receive the Initial Maintenance packet from the Cable Modem sooner than expected and the Cable Modem is considered a flapping modem. This count may indicate: Intermittent downstream sync loss, or DHCP or modem registration problems. The Flap Count (ccsFlapTotal) will be incremented when this counter is incremented. Discontinuites in the value of this counter can occur if this entry is removed from the table and then re-added, and are indicated by a change in the value of ccsFlapCreateTime.
I32 ccsFlapInsertionTime	1.3.6.1.4.1.9.9.114.1.1.4	Integer32	read-write	The insertion-time is an empirically derived, worst-case number of seconds which the cable modem requires to complete registration. The time taken by cable modems to complete their registration is measured by the cable operators and this information helps to determine the insertion time. If the cable modem has not completed the registration stage within this insertion-time setting, the cable modem will be inserted into the flap-list.
DAT ccsFlapLastClearTime	1.3.6.1.4.1.9.9.114.1.1.10	DateAndTime	read-only	The last time that all the entries in the ccsFlapTable are destroyed. There are several ways to destroy all the entries in the ccsFlapTable. Setting the object ccsFlapClearAll to true is one way, and the other way is through Command Line Interface. This timestamp can be used to know when all the entries in the ccsFlapTable are destroyed. The special value of all '00'Hs indicates that the entries in the ccsFlapTable have never been destroyed.
DAT ccsFlapLastFlapTime	1.3.6.1.4.1.9.9.114.1.1.5.1.10	DateAndTime	read-only	The flap time is set whenever the Cable Modem triggers a flap detector.
DAT ccsFlapLastResetTime	1.3.6.1.4.1.9.9.114.1.1.5.1.20	DateAndTime	read-only	The last time that all the statistical objects of this entry are started from zero. There are several ways to restart the the statistical objects from zero. Setting the object ccsFlapResetNow or ccsFlapResetAll to true via SNMP is one way and and the other way is via command Line Interface. This timestamp can be used to know the last time the statistical objects are started from zero. The special value of all '00'Hs indicates that these statistical objects of this entry in the ccsFlapTable have never been reset.
G32 ccsFlapListCurrentSizeEx	1.3.6.1.4.1.9.9.114.1.1.2	Gauge32	read-only	The total number of flapped modem entries (ccsCmFlapEntry) that reported in the ccsCmFlapTable. The maximum value will be ccsFlapListMaxSize * .
I32 ccsFlapListMaxSize	1.3.6.1.4.1.9.9.114.1.1.1	Integer32	read-write	The maximum number of flapped modem entries (ccsCmFlapEntry) per Cable downstream interface that can be reported in the ccsCmFlapTable. If the Cable downstream interface has more flapped modems than the ccsFlapListMaxSize, some of the flapped modems will not be shown in the ccsCmFlapTable. In this case, the users may want to increase the ccsFlapMaxSize.
MAC ccsFlapMacAddr	1.3.6.1.4.1.9.9.114.1.1.5.1.1	MacAddress	not-accessible	MAC address of the Cable Modem's Cable interface which identifies a flap-list entry for a flapping Cable Modem.
C32 ccsFlapMisses	1.3.6.1.4.1.9.9.114.1.1.5.1.6	Counter32	read-only	The number of times the CMTS misses the Ranging request from the Cable Modem. The CMTS issues a Station Maintenance packet every 10 seconds and waits for a Ranging request from the Cable Modem. If the CMTS misses a Ranging request within 25 msec then the Misses count will be incremented. If ccsFlapTotal is high, Hits and Misses are high but ccsFlapPowerAdjustments and ccsFlapInsertionFails are low then the flapping is probably caused by the modem going up and down. Miss counts can indicate: Intermittent upstream, Laser clipping, or Noise bursts. Laser clipping can happen if the signal power is too high when the upstream electrical signal is converted to an optical signal. When it happens the more input produces less output, until finally there is no more increase in output. This phenomena is called laser clipping. Discontinuites in the value of this counter can occur if this entry is removed from the table and then re-added, and are indicated by a change in the value of ccsFlapCreateTime.
U32 ccsFlapMissNum	1.3.6.1.4.1.9.9.114.1.1.5.1.15	Unsigned32	read-only	The number of times the CMTS misses the Ranging request from the Cable Modem. The CMTS issues a Station Maintenance packet every 10 seconds and waits for a Ranging request from the Cable Modem. If the CMTS misses a Ranging request within 25 msec then the Miss Object will be incremented. If ccsFlapTotalNum is high, Hit and Miss are high but ccsFlapPowerAdjustmentNum and ccsFlapInsertionFailNum are low then the flapping is probably caused by the modem going up and down. Miss object can indicate: Intermittent upstream, Laser clipping, or Noise bursts. Laser clipping can happen if the signal power is too high when the upstream electrical signal is converted to an optical signal. When it happens the more input produces less output, until finally there is no more increase in output. This phenomena is called laser clipping. This object is going to replace the object ccsFlapMisses and the value of this object can be reset to zero if this entry is removed from the table and then re-added, or if an user resets all the statistical objects for this entry. The value of the object ccsFlapLastResetTime indicates the last reset time.
U32 ccsFlapMissThreshold	1.3.6.1.4.1.9.9.114.1.1.7	Unsigned32	read-write	Per modem miss threshold which triggers polling flap detector. When the number of times a cable modem does not acknowledge a MAC-layer keepalive message from a cable modem card exceeds the miss threshold, the cable modem is placed in the flap list.
ccsFlapObjects	1.3.6.1.4.1.9.9.114.1.1
U32 ccsFlapPowerAdjustmentNum	1.3.6.1.4.1.9.9.114.1.1.5.1.17	Unsigned32	read-only	The number of times the Cable Modem upstream transmit power is adjusted during station maintenance. When the adjustment is greater than the power adjustment threshold the number will be incremented. The power adjustment threshold is chosen in an implementation-dependent manner The Flap number (ccsFlapTotalNum) will be incremented when this object is incremented. If ccsFlapTotalNum is high, ccsFlapPowerAdjustmentNum is high but the Hit and Miss are low and ccsFlapInsertionFailNum are low then the flapping is probably caused by an improper transmit power level setting at the modem end. This object can indicate: Amplifier degradation, Poor connections, or Wind, moisture, or temperature sensitivity. This object is going to replace the object ccsFlapPowerAdjustments and the value of this object can be reset to zero if this entry is removed from the table and then re-added, or if a user resets all the statistical objects for this entry. The value of the object ccsFlapLastResetTime indicates the last reset time.
C32 ccsFlapPowerAdjustments	1.3.6.1.4.1.9.9.114.1.1.5.1.8	Counter32	read-only	The number of times the Cable Modem upstream transmit power is adjusted during station maintenance. When the adjustment is greater than the power adjustment threshold the counter will be incremented. The power adjustment threshold is chosen in an implementation-dependent manner. The Flap Count (ccsFlapTotal) will be incremented when this counter is incremented. If ccsFlapTotal is high, ccsFlapPowerAdjustments is high but the Hits and Misses are low and ccsFlapInsertionFails are low then the flapping is probably caused by an improper transmit power level setting at the modem end. This count can indicate: Amplifier degradation, Poor connections, or Wind, moisture, or temperature sensitivity. Discontinuites in the value of this counter can occur if this entry is removed from the table and then re-added, and are indicated by a change in the value of ccsFlapCreateTime.
I32 ccsFlapPowerAdjustThreshold	1.3.6.1.4.1.9.9.114.1.1.6	Integer32	read-write	The power adjust threshold. When the power of the modem is adjusted beyond this threshold, the modem will be inserted into the flap-list.
T/F ccsFlapResetAll	1.3.6.1.4.1.9.9.114.1.1.8	TruthValue	read-write	Setting this object to true(1) causes ccsFlapInsertionFailNum, ccsFlapHitNum, ccsFlapMissNum, ccsFlapCrcErrorNum, ccsFlapPowerAdjustmentNum and ccsFlapTotalNum objects of each entry in ccsFlapTable to be started from zero. Reading this object always returns false(2).
T/F ccsFlapResetNow	1.3.6.1.4.1.9.9.114.1.1.5.1.19	TruthValue	read-write	Setting this object to true(1) will set the following objects of this entry to 0: ccsFlapInsertionFailsNum, ccsFlapHitsNum, ccsFlapMissesNum, ccsFlapCrcErrorsNum, ccsFlapPowerAdjustmentsNum and ccsFlapTotalNum. Setting this object to true does not destroy the entry, so the ccsFlapCreateTime will be unchanged. Reading this object always returns false(2).
ROW ccsFlapRowStatus	1.3.6.1.4.1.9.9.114.1.1.5.1.12	RowStatus	read-write	Controls and reflects the status of rows in this table. When a cable modem triggers a flap detector, if an entry does not already exist for this cable modem, and ccsFlapListCurrentSize is less than ccsFlapListMaxSize, then an entry will be created in this table. The new instance of this object will be set to active(1). All flapping modems have the status of active(1). Active entries are removed from the table after they have not triggered any additional flap detectors for the period of time defined in ccsFlapAging. Alternatively, setting this instance to destroy(6) will remove the entry immediately. createAndGo(4) and createAndWait(5) are not supported.
ccsFlapTable	1.3.6.1.4.1.9.9.114.1.1.5		not-accessible	This table keeps the records of modem state changes. It can be used to identify the problematic cable modems. An entry can be deleted from the table but can not be added to the table.
C32 ccsFlapTotal	1.3.6.1.4.1.9.9.114.1.1.5.1.9	Counter32	read-only	Whenever the Cable Modem passes flap detection, then the flap counter is increased. There are 3 flap detectors defined: (1) When ccsFlapInsertionFails is increased the Flap count will be increased. (2) When the CMTS receives a Miss followed by a Hit then the Flap count will be increased. (3) When ccsFlapPowerAdjustments is increased the Flap count will be increased. Discontinuites in the value of this counter can occur if this entry is removed from the table and then re-added, and are indicated by a change in the value of ccsFlapCreateTime.
U32 ccsFlapTotalNum	1.3.6.1.4.1.9.9.114.1.1.5.1.18	Unsigned32	read-only	Whenever the Cable Modem passes flap detection, then the flap number is increased. There are 3 flap detectors defined: (1) When ccsFlapInsertionFailNum is increased the Flap number will be increased. (2) When the CMTS receives a Miss followed by a Hit then the Flap number will be increased. (3) When ccsFlapPowerAdjustmentNum is increased the Flap number will be increased. This object is going to replace the object ccsFlapTotal and the value of this object can be reset to zero if this entry is removed from the table and then re-added, or if an user resets all the statistical objects for this entry. The value of the object ccsFlapLastResetTime indicates the last reset time.
NUM ccsFlapUpstreamIfIndex	1.3.6.1.4.1.9.9.114.1.1.5.1.2	InterfaceIndex	read-only	The ifIndex of the Cable upstream interface whose ifType is docsCableUpstream(129). The CMTS detects a flapping Cable Modem from its Cable upstream interface.
NTF ccsHoppingNotification	1.3.6.1.4.1.9.9.114.2.0.1			A notification is sent when there's a change in frequency (hopping), modulation, or profile. In the case of frequency hopping, ccsUpSpecMgmtHopCondition would indicate whether SNR or modemOffline that caused the hopping.
ccsMIBNotifications	1.3.6.1.4.1.9.9.114.2.0
ccsNotificationGroup	1.3.6.1.4.1.9.9.114.3.2.4			The notification which a CISCO-CABLE-SPECTRUM-MIB entity is required to implement.
ccsNotificationGroupRev1	1.3.6.1.4.1.9.9.114.3.2.9			The notification which a CISCO-CABLE-SPECTRUM-MIB entity is required to implement.
ccsSNRRequestEntry	1.3.6.1.4.1.9.9.114.1.2.3.1		not-accessible	Information about an CNR request. The management system uses ccsSNRRequestStatus to control entry modification, creation, and deletion.
I32 ccsSNRRequestIndex	1.3.6.1.4.1.9.9.114.1.2.3.1.1	Integer32	not-accessible	An arbitrary integer to uniquely identify this entry.
MAC ccsSNRRequestMacAddr	1.3.6.1.4.1.9.9.114.1.2.3.1.2	MacAddress	read-create	A MAC address that identifies the remote online CM that the CNR measurement operation is being performed on.
CCS ccsSNRRequestOperation	1.3.6.1.4.1.9.9.114.1.2.3.1.4	CCSRequestOperation	read-create	The control that allows start or abort of the test. Since there is only 1 FFT engine running on the CMTS, 'start' changes ccsSNRRequestOperState to 'pending' state if the FFT is busy; Otherwise, it changes ccsSNRRequestOperState to 'running'. 'abort' changes ccsSNRRequestOperState to 'aborted' state. Only 'start' when request is to be started and 'abort' when request is to be aborted can be set by the user. It is set to 'none' only on completion of the request by the FFT engine.
CCS ccsSNRRequestOperState	1.3.6.1.4.1.9.9.114.1.2.3.1.5	CCSRequestOperState	read-only	The operational state of the test. ccsSNRRequestMacAddr, cannot be changed when the ccsSNRRequestOperState is in the 'running' state.
I32 ccsSNRRequestSNR	1.3.6.1.4.1.9.9.114.1.2.3.1.3	Integer32	read-only	A snap shot of the CNR value that is measured over the in-use band frequency. The ccsSNRRequestSNR is set to 0 when ccsSNRRequestOperState is in the 'running' state.
TIM ccsSNRRequestStartTime	1.3.6.1.4.1.9.9.114.1.2.3.1.6	TimeStamp	read-only	The value of sysUpTime when the CNR measurement operation starts.
ROW ccsSNRRequestStatus	1.3.6.1.4.1.9.9.114.1.2.3.1.8	RowStatus	read-create	The control that allows modification, creation, and deletion of entries. For detailed rules see the ccsSpectrumRequestEntry DESCRIPTION.
TIM ccsSNRRequestStoppedTime	1.3.6.1.4.1.9.9.114.1.2.3.1.7	TimeStamp	read-only	The value of sysUpTime when the CNR measurement operation stops.
ccsSNRRequestTable	1.3.6.1.4.1.9.9.114.1.2.3		not-accessible	A table of CNR requests.
ccsSpecGroupFreqEntry	1.3.6.1.4.1.9.9.114.1.3.2.1		not-accessible	An entry in ccsSpecGroupFreqTable. Each entry represents a center frequency or a frequency band configured for the spectrum group.
ccsSpecGroupFreqGroup	1.3.6.1.4.1.9.9.114.3.2.11			Global spectrum group frequency / band definition.
U32 ccsSpecGroupFreqIndex	1.3.6.1.4.1.9.9.114.1.3.2.1.1	Unsigned32	not-accessible	An arbitrary index to uniquely identify frequencies or bands configured in spectrum group.
I32 ccsSpecGroupFreqLower	1.3.6.1.4.1.9.9.114.1.3.2.1.3	Integer32	read-create	The lower frequency configured in spectrum group. This is a mandatory object and can be modified when the row is active. To configure a band frequency in the spectrum group, the value of this object must be lower than the value of the corresponding instance of ccsSpecGroupFreqUpper. To configure a fixed center frequency in the spectrum group, the value of this object must be equal to the value of the corresponding instance of ccsSpecGroupFreqUpper.
ccsSpecGroupFreqTable	1.3.6.1.4.1.9.9.114.1.3.2		not-accessible	This table contains the frequency and band configuration of the spectrum group.
INT ccsSpecGroupFreqType	1.3.6.1.4.1.9.9.114.1.3.2.1.2	INTEGER	read-create	The type of the frequency configured in spectrum group. This is a mandatory object and can be modified when the row is active. If the value of centerFreq(1) is specified, the values of the corresponding instance of ccsSpecGroupFreqLower and csSpecGroupFreqUpper object must be identical. If the value of bandFreq(2) is specified, the values of the corresponding instance of ccsSpecGroupFreqLower and csSpecGroupFreqUpper must be unique.
I32 ccsSpecGroupFreqUpper	1.3.6.1.4.1.9.9.114.1.3.2.1.4	Integer32	read-create	The upper frequency configured in spectrum group. This is a mandatory object and can be modified when the row is active. To configure a band frequency in the spectrum group, the value of this object must be greater than the value of the corresponding instance of ccsSpecGroupFreqLower. To configure a fixed center frequency in the spectrum group, the value of this object must be equal to the value of the corresponding instance of ccsSpecGroupFreqLower.
U32 ccsSpecGroupNumber	1.3.6.1.4.1.9.9.114.1.2.4.1.1	Unsigned32	not-accessible	The spectrum group number. The value of the object is same as the value of ccsUpSpecMgmtSpecGroup object except value 0.
ROW ccsSpecGroupRowStatus	1.3.6.1.4.1.9.9.114.1.3.2.1.6	RowStatus	read-create	The status of this conceptual row. This object is used for creating/deleting entries in ccsSpecGroupFreqTable. A conceptual row may not be created via SNMP without explicitly setting the value of ccsSpecGroupRowStatus to createAndGo(4). A conceptual row can not have the status of active(1) until proper values have been assigned to the mandatory objects ccsSpecGroupFreqType, ccsSpecGroupFreqLower, and ccsSpecGroupFreqUpper. A conceptual row may be modified or deleted any time. If the frequency represents by the row has been assigned to a cable upstream interface, modifying or deleting such row would cause the cable upstream interface frequency reassignment.
STO ccsSpecGroupStorage	1.3.6.1.4.1.9.9.114.1.3.2.1.5	StorageType	read-create	The storage type for this conceptual row.
NUM ccsSpecGroupUpstreamIfIndex	1.3.6.1.4.1.9.9.114.1.2.4.1.2	InterfaceIndex	not-accessible	The ifIndex of the Cable upstream interface belonging to this Spectrum Group. The value of the corresponding instance of ifType is 'docsCableUpstream(129)'.
ROW ccsSpecGroupUpstreamRowStatus	1.3.6.1.4.1.9.9.114.1.2.4.1.4	RowStatus	read-create	The status for this conceptual row. This object is used for creating/deleting entries in ccsUpInSpecGroupTable.
STO ccsSpecGroupUpstreamStorage	1.3.6.1.4.1.9.9.114.1.2.4.1.3	StorageType	read-create	The storage type for this conceptual row.
NTF ccsSpecMgmtNotification	1.3.6.1.4.1.9.9.114.2.0.2			A notification is sent when there's a change in frequency hopping, modulation, or profile. ccsUpSpecMgmtCriteria is used to indicate the cause(s).
ccsSpectrumDataEntry	1.3.6.1.4.1.9.9.114.1.2.2.1		not-accessible	Information about the receiving power or background noise measured at a particular frequency for the ccsSpectrumRequestEntry.
CCS ccsSpectrumDataFreq	1.3.6.1.4.1.9.9.114.1.2.2.1.1	CCSMeasuredFrequency	read-only	ccsSpectrumDataPower measurement frequency. Due to the adjustment calculation the starting frequency range for the actual measured frequency if off comparing to the configured frequency. Refer to ccsSpectrumRequestLowFreq DESCRIPTIONS for the adjustment calculation.
INT ccsSpectrumDataPower	1.3.6.1.4.1.9.9.114.1.2.2.1.2	INTEGER	read-only	The receiving power measured at the ccsSpectrumDataFreq.
ccsSpectrumDataTable	1.3.6.1.4.1.9.9.114.1.2.2		not-accessible	This table contains the receiving power or background noise measurement based on the criteria that is set in the ccsSpectrumRequestEntry.
ccsSpectrumGroup	1.3.6.1.4.1.9.9.114.3.2.2			Group of objects implemented in Cable Modem Termination Systems providing upstream spectrum data information.
ccsSpectrumObjects	1.3.6.1.4.1.9.9.114.1.2
ccsSpectrumRequestEntry	1.3.6.1.4.1.9.9.114.1.2.1.1		not-accessible	Information about a spectrum data request. The management system uses ccsSpectrumRequestStatus to control entry modification, creation, and deletion. Setting ccsSpectrumRequestEntry to 'destroy' causes entry and its associated data (example: ccsSpectrumDataEntry) to be cleaned up properly. It is suggested the entry to be set to 'destroy' when the row is no longer in use.
NUM ccsSpectrumRequestIfIndex	1.3.6.1.4.1.9.9.114.1.2.1.1.2	InterfaceIndexOrZero	read-create	The ifIndex of a docsCableUpstream(129) interface. The background noise measurement is requested when ccsSpectrumRequestIfIndex is specified. The receiving power measurement is requested when ccsSpectrumRequestMacAddr is specified; In this case, ccsSpectrumRequestIfIndex is the ifIndex of the remote CM's upstream.
I32 ccsSpectrumRequestIndex	1.3.6.1.4.1.9.9.114.1.2.1.1.1	Integer32	not-accessible	An arbitrary integer to uniquely identify the entry.
CCS ccsSpectrumRequestLowFreq	1.3.6.1.4.1.9.9.114.1.2.1.1.4	CCSFrequency	read-create	Start of frequency range. The ccsSpectrumRequestLowFreq is adjusted slightly to accurately represent the actual starting point of the frequency range. The adjustment is done as follows: aFactor = (center frequency - ccsSpectrumRequestLowFreq)/12K ccsSpectrumRequestLowFreq = center frequency - (aFactor * 12K) where 12K is the FFT's bin size.
MAC ccsSpectrumRequestMacAddr	1.3.6.1.4.1.9.9.114.1.2.1.1.3	MacAddress	read-create	A MAC address that identifies a remote CM. The default value of 0000.0000.0000 indicates that the background noise will be measured for the upstream. In this case, ccsSpectrumRequestIfIndex must be specified. Other values indicate that the receiving power test is requested for the ccsSpectrumRequestMacAddr with CM signals.
CCS ccsSpectrumRequestOperation	1.3.6.1.4.1.9.9.114.1.2.1.1.7	CCSRequestOperation	read-create	The control that allows 'start' or 'abort' of the test. Since there is only 1 FFT engine running on the CMTS, 'start' changes ccsSpectrumRequestOperState to 'pending' state if the FFT is busy; Otherwise, it changes ccsSpectrumRequestOperState to 'running'. 'abort' changes ccsSpectrumRequestOperState to 'aborted' state. 'abort' is only allowed when ccsSpectrumRequestOperState is in 'pending' state. Only 'start' when request is to be started and 'abort' when request is to be aborted can be set by the user. It is set to 'none' only on completion of the request by the FFT engine. Note: The SNMP SET is rejected if ccsSpectrumRequestStatus is not 'active'.
CCS ccsSpectrumRequestOperState	1.3.6.1.4.1.9.9.114.1.2.1.1.8	CCSRequestOperState	read-only	The operational state of the test. ccsSpectrumRequestIfIndex, ccsSpectrumRequestMacAddr, ccsSpectrumRequestUpperFreq, ccsSpectrumRequestLowFreq and ccsSpectrumRequestResolution cannot be changed when CCSRequestOperState is in the 'running' state. For a detailed description, see the CCSRequestOperState DESCRIPTION.
I32 ccsSpectrumRequestResolution	1.3.6.1.4.1.9.9.114.1.2.1.1.6	Integer32	read-create	A span between two frequencies. ccsSpectrumRequestResolution dictates the amount of receiving power data to be returned in ccsSpectrumDataTable. The finer the resolution, the more data returned. ccsSpectrumRequestResolution is adjusted to a value which is divisible by FFT's 12KHz bin size.
TIM ccsSpectrumRequestStartTime	1.3.6.1.4.1.9.9.114.1.2.1.1.9	TimeStamp	read-only	The value of sysUpTime when the spectrum measurement operation starts.
ROW ccsSpectrumRequestStatus	1.3.6.1.4.1.9.9.114.1.2.1.1.11	RowStatus	read-create	The control that allows modification, creation, and deletion of entries. For detailed rules, see the ccsSpectrumRequestEntry DESCRIPTION.
TIM ccsSpectrumRequestStoppedTime	1.3.6.1.4.1.9.9.114.1.2.1.1.10	TimeStamp	read-only	The value of sysUpTime when the spectrum measurement operation stops.
ccsSpectrumRequestTable	1.3.6.1.4.1.9.9.114.1.2.1		not-accessible	This table contains the spectrum data requests. There are two types of request: background noise and SNR. Refer to ccsSpectrumRequestIfIndex and ccsSpectrumRequestMacAddr DESCRIPTIONS on how the type of request is determined.
CCS ccsSpectrumRequestUpperFreq	1.3.6.1.4.1.9.9.114.1.2.1.1.5	CCSFrequency	read-create	End of frequency range. With the adjustment done to the ccsSpectrumRequestLowFreq, ccsSpectrumRequestUpperFreq will also be adjusted to the last frequency within the specified range divisible by the bin size. Refer to the ccsSpectrumRequestLowFreq DESCRIPTION for the adjustment calculation.
ccsUpInFiberNodeEntry	1.3.6.1.4.1.9.9.114.1.2.5.1		not-accessible	An entry in ccsUpInFiberNodeTable. Each entry represents a cable upstream interface assigned to a fiber-node.
ccsUpInFiberNodeGroup	1.3.6.1.4.1.9.9.114.3.2.14			Group of objects to populate all cable upstream interfaces in fiber-node.
ccsUpInFiberNodeTable	1.3.6.1.4.1.9.9.114.1.2.5		not-accessible	This table contains the cable upstream interfaces in a fiber-node.Each fiber-node uniquely represents an RF domain.Cable upstream interfaces in the same fiber-node are physically combined together into the same RF domain.
ccsUpInSpecGroupEntry	1.3.6.1.4.1.9.9.114.1.2.4.1		not-accessible	An entry in ccsUpInSpecGroupTable table. Each entry represents a cable upstream interface assigned to a spectrum group.
ccsUpInSpecGroupGroup	1.3.6.1.4.1.9.9.114.3.2.13			Group of objects to populate all cable upstream interfaces in spectrum group.
ccsUpInSpecGroupTable	1.3.6.1.4.1.9.9.114.1.2.4		not-accessible	This table contains the cable upstream interfaces assigned to a spectrum group. A spectrum group contains one or more fixed frequencies or frequency bands which can be assigned to cable upstream interfaces in the spectrum group.
I32 ccsUpSpecMgmtCNR	1.3.6.1.4.1.9.9.114.1.3.1.1.20	Integer32	read-only	Current CNR. A value -99 indicates the system detected no modem on line, and a value of -100 indicates the system was unable to retrieve the CNR value.
I32 ccsUpSpecMgmtCnrThres1	1.3.6.1.4.1.9.9.114.1.3.1.1.18	Integer32	read-write	The Carrier to Noise (CNR) threshold. This object is applicable for modulation profile 1. When the CMTS detects that the CNR goes lower than ccsUpSpecMgmtCnrThres1, it switches to profile 2. Therefore, ccsUpSpecMgmtCnrThres1 should be larger than ccsUpSpecMgmtCnrThres2. A value 0 indicates to bypass the threshold check.
I32 ccsUpSpecMgmtCnrThres2	1.3.6.1.4.1.9.9.114.1.3.1.1.19	Integer32	read-write	The Carrier to Noise (CNR) threshold. This object is applicable for modulation profile 2. Refer to ccsUpSpecMgmtCriteria on how ccsUpSpecMgmtCnrThres2 can trigger a change in frequency, modulation or channel width. A value 0 indicates to bypass the threshold check. Note: The SNMP SET is rejected if both ccsUpSpecMgmtCnrThres1, ccsUpSpecMgmtCnrThres2 are non-zero and ccsUpSpecMgmtCnrThres2 is higher than ccsUpSpecMgmtCnrThres1.
BIT ccsUpSpecMgmtCriteria	1.3.6.1.4.1.9.9.114.1.3.1.1.23	Bits	read-only	Defines the criteria that trigger a change in frequency hopping, modulation or channel width. Depending on the type of linecards, the criteria are slightly different: For the linecards that have no Hardware Based Spectrum Management capability like the uBR-MC1xC, change in modulation or frequency occurs in the following criteria: 1) Change from modulation profile 1 to modulation profile 2 would occur when CMTS detects the SNR that goes below the threshold and either corr FEC or uncorr FEC is above the threshold. In this case, snrBelowThres and either corrFecAboveThres or uncorrFecAboveThres bits will get set. 2) Change from modulation profile 2 to modulation profile 1 would occur when CMTS detects the SNR goes above the threshold+3 and both corr FEC and uncorr FEC are below the threshold. In this case, snrAboveThres and corrFecBelowThres and uncorrFecBelowThres bits will get set. 3) Change in frequency or frequency hopping would occur when CMTS detects no active modem on the link. In this case, noActiveModem bit will get set accordingly. For the linecards that have the Hardware Based Spectrum Management capability, change in frequency, modulation or channel width occurs in the following criteria: 1) when CMTS detects the SNR or CNR goes below the threshold and either corr FEC or uncorr FEC is above the threshold. In this case, either snrBelowThres or cnrBelowThres and either corrFecAboveThres or uncorrFecAboveThres bits will get set. 2) when CMTS detects the SNR or CNR goes above the threshold + 3 and both corr FEC and uncorr FEC are below the threshold. In this case, either snrAboveThres or cnrAboveThres and both corrFecBelowThres and uncorrFecBelowThres bits will get set. 3) when CMTS detects no active modem on the link or uncorr FEC is above ccsUpSpecMgmtFecUnCorrectThres2. In this case noActiveModem or uncorrFecAboveSecondThres bit will get set accordingly. Note: The order of frequency, modulation or channel width changes for the advanced spectrum management linecards will be determined based on the selection of the ccsUpSpecMgmtHopPriority.
ccsUpSpecMgmtEntry	1.3.6.1.4.1.9.9.114.1.3.1.1		not-accessible	Upstream interface's spectrum management information.
I32 ccsUpSpecMgmtFecCorrectThres1	1.3.6.1.4.1.9.9.114.1.3.1.1.4	Integer32	read-write	The Forward Error Correction (FEC) correctable count threshold. This object is applicable for profile 1. A value 0 indicates to bypass the threshold check. When CMTS detects that FEC correctable count goes higher than ccsUpSpecMgmtFecCorrectThres1, it switch to Profile 2. Therefore, ccsUpSpecMgmtFecCorrectThres1 should be smaller than ccsUpSpecMgmtFecCorrectThres2.
I32 ccsUpSpecMgmtFecCorrectThres2	1.3.6.1.4.1.9.9.114.1.3.1.1.5	Integer32	read-write	The FEC correctable count threshold. This object is applicable for profile 2. When CMTS detects that FEC correctable count goes higher than ccsUpSpecMgmtFecCorrectThres2, modulation change can occur, depending on the type of ccsUpSpecMgmtHopPriority. Note: SNMP SET will be rejected if ccsUpSpecMgmtFecCorrectThres2 is lower than ccsUpSpecMgmtFecCorrectThres1.
I32 ccsUpSpecMgmtFecUnCorrectThres1	1.3.6.1.4.1.9.9.114.1.3.1.1.6	Integer32	read-write	The FEC uncorrectable count threshold. This object is applicable for modulation profile 1. A value 0 indicates to bypass the threshold check. When CMTS detects that FEC uncorrectable count goes higher than ccsUpSpecMgmtFecUnCorrectThres1, it switches to Profile 2. Therefore, ccsUpSpecMgmtFecUnCorrectThres1 should be smaller than ccsUpSpecMgmtFecUnCorrectThres2.
I32 ccsUpSpecMgmtFecUnCorrectThres2	1.3.6.1.4.1.9.9.114.1.3.1.1.7	Integer32	read-write	The FEC uncorrectable count threshold. This object is applicable for modulation profile 2. A value 0 indicates to bypass the threshold check. Refer to ccsUpSpecMgmtCriteria on how ccsUpSpecMgmtFecUnCorrectThres2 can trigger a change in frequency, modulation or channel width. Note: SNMP SET is rejected if ccsUpSpecMgmtFecUnCorrectThres2 is lower than ccsUpSpecMgmtFecUnCorrectThres1.
U32 ccsUpSpecMgmtFromBandWidth	1.3.6.1.4.1.9.9.114.1.3.1.1.12	Unsigned32	read-only	Bandwidth before hopping occurs.
U32 ccsUpSpecMgmtFromCenterFreq	1.3.6.1.4.1.9.9.114.1.3.1.1.10	Unsigned32	read-only	Center frequency before hopping occurs. A value 0 indicates that the interface has no frequency assigned.
I32 ccsUpSpecMgmtFromModProfile	1.3.6.1.4.1.9.9.114.1.3.1.1.14	Integer32	read-only	Modulation profile index before hopping occurs. It is the index identical to the docsIfModIndex in the docsIfCmtsModulationTable. For the detailed descriptions, see the docsIfCmtsModulationTable and docsIfCmtsModIndex DESCRIPTIONS.
ccsUpSpecMgmtGroup	1.3.6.1.4.1.9.9.114.3.2.3			Group of objects implemented in Cable Modem Termination Systems for configuring cable upstream interface attributes which are used to increase the performance and proactive hopping.
ccsUpSpecMgmtGroupRev1	1.3.6.1.4.1.9.9.114.3.2.6			Group of objects implemented in Cable Modem Termination Systems for configuring cable upstream interface attributes which are used to increase the performance and proactive hopping. This object group has been deprecated and replaced by ccsUpSpecMgmtGroupRev2.
ccsUpSpecMgmtGroupRev2	1.3.6.1.4.1.9.9.114.3.2.8			Group of objects implemented in Cable Modem Termination Systems for configuring cable upstream interface attributes.
ccsUpSpecMgmtGroupRev3	1.3.6.1.4.1.9.9.114.3.2.10			Group of objects implemented in Cable Modem Termination Systems for configuring cable upstream interface attributes.
ccsUpSpecMgmtGroupRev4	1.3.6.1.4.1.9.9.114.3.2.12			Group of objects implemented in Cable Modem Termination Systems for configuring cable upstream interface attributes.
INT ccsUpSpecMgmtHopCondition	1.3.6.1.4.1.9.9.114.1.3.1.1.9	INTEGER	read-only	A condition that triggers hopping. The SNR condition occurs when SNR does not meet the ccsUpSpecMgmtSnrThres1 or ccsUpSpecMgmtSnrThres2. The stationMaintainenceMiss condition occurs when the percentage of offline CMs is reached.
I32 ccsUpSpecMgmtHopPeriod	1.3.6.1.4.1.9.9.114.1.3.1.1.22	Integer32	read-only	The minimum time between frequency hops in seconds. A value 0 indicates that the interface has no spectrum group assigned. i.e. ccsUpSpecMgmtSpecGroup equals to 0.
INT ccsUpSpecMgmtHopPriority	1.3.6.1.4.1.9.9.114.1.3.1.1.1	INTEGER	read-write	A preference priority for changing the frequency, modulation, or channel width supporting the automatic switching of the modulation scheme when the channel becomes noisy. The default priority is frequency, modulation, and channel width. With the default preference, the frequency is changed if there is a clean band available. If there's no clean band available, the modulation is changed. And if the clean band is still not available, the bandwidth is reduced until an acceptable band is found or a minimum bandwidth of 200KHz.
I32 ccsUpSpecMgmtMissedMaintMsgThres	1.3.6.1.4.1.9.9.114.1.3.1.1.21	Integer32	read-only	The missed maintenance message threshold in percentage. A value 0 indicates that the interface has no spectrum group assigned. i.e. ccsUpSpecMgmtSpecGroup equals 0.
U32 ccsUpSpecMgmtSharedSpectrum	1.3.6.1.4.1.9.9.114.1.3.1.1.25	Unsigned32	read-only	The fiber-node assigned to the upstreams. Upstreams having same fiber-node number indicates that they physically combine together into same RF domain and must have unique frequency assigned. The value of 0 for the object indicates that the upstream is not physically combine with any others.
I32 ccsUpSpecMgmtSNR	1.3.6.1.4.1.9.9.114.1.3.1.1.16	Integer32	read-only	Current SNR. A value -99 indicates the system detected no modem on line, and a value of -100 indicates the system was unable to retrieve the SNR value.
I32 ccsUpSpecMgmtSnrPollPeriod	1.3.6.1.4.1.9.9.114.1.3.1.1.8	Integer32	read-write	A period between SNR pollings. The SNR is collected from the Fast Fourier Transform (FFT) measurement over the in-use band when there is no CM signals. When the CMTS detects that SNR doesn't meet ccsUpSpecMgmtSnrThres1 or ccsUpSpecMgmtSnrThres2, a possible hopping occurs, depending on the type of ccsUpSpecMgmtHopPriority.
I32 ccsUpSpecMgmtSnrThres1	1.3.6.1.4.1.9.9.114.1.3.1.1.2	Integer32	read-write	The Signal to Noise (SNR) threshold. This object is applicable for modulation profile 1. When the CMTS detects that the SNR goes lower than ccsUpSpecMgmtSnrThres1, it switches to profile 2. Therefore, ccsUpSpecMgmtSnrThres1 should be larger than ccsUpSpecMgmtSnrThres2. A value 0 indicates to bypass the threshold check.
I32 ccsUpSpecMgmtSnrThres2	1.3.6.1.4.1.9.9.114.1.3.1.1.3	Integer32	read-write	The Signal to Noise (SNR) threshold. This object is applicable for modulation profile 2. Refer to ccsUpSpecMgmtCriteria on how ccsUpSpecMgmtSnrThres2 can trigger a change in frequency, modulation or channel width. A value 0 indicates to bypass the threshold check. Note: The SNMP SET is rejected if both ccsUpSpecMgmtSnrThres1, ccsUpSpecMgmtSnrThres2 are non-zero and ccsUpSpecMgmtSnrThres2 is higher than ccsUpSpecMgmtSnrThres1.
U32 ccsUpSpecMgmtSpecGroup	1.3.6.1.4.1.9.9.114.1.3.1.1.24	Unsigned32	read-only	The spectrum group assigned to the upstream. The value of 0 for the object indicates that the upstream has no spectrum group assigned.
ccsUpSpecMgmtTable	1.3.6.1.4.1.9.9.114.1.3.1		not-accessible	This table contains the attributes of the cable upstream interfaces, ifType of docsCableUpstream(129), to be used for improving performance and proactive hopping. Proactive hopping is achieved by setting the SNR polling period over the in-use band without CM signals.
U32 ccsUpSpecMgmtToBandWidth	1.3.6.1.4.1.9.9.114.1.3.1.1.13	Unsigned32	read-only	Current bandwidth.
U32 ccsUpSpecMgmtToCenterFreq	1.3.6.1.4.1.9.9.114.1.3.1.1.11	Unsigned32	read-only	Current center frequency. A value 0 indicates that the interface has no frequency assigned.
I32 ccsUpSpecMgmtToModProfile	1.3.6.1.4.1.9.9.114.1.3.1.1.15	Integer32	read-only	The current modulation profile index. It is the index identical to the docsIfModIndex in the docsIfCmtsModulationTable. For the detailed descriptions, see the docsIfCmtsModulationTable and docsIfCmtsModIndex DESCRIPTIONS.
CCS ccsUpSpecMgmtUpperBoundFreq	1.3.6.1.4.1.9.9.114.1.3.1.1.17	CCSFrequency	read-only	Upper bound frequency that the upstream supports.
ciscoCableSpectrumMIB	1.3.6.1.4.1.9.9.114			This is the MIB Module for Cable Spectrum Management for DOCSIS-compliant Cable Modem Termination Systems (CMTS). Spectrum management is a software/hardware feature provided in the CMTS so that the CMTS may sense both downstream and upstream plant impairments, report them to a management entity, and automatically mitigate them where possible. The CMTS directly senses upstream transmission errors.It may also indirectly monitor the condition of the plant by keeping a record of modem state changes. It is desireable to perform these functions without reducing throughput or latency and without creating additional packet overhead on the RF plant. The purpose of cable Spectrum Management is to prevent long term service interruptions caused by upstream noise events in the cable plant. It is also used for fault management and trouble shooting the cable network. When modems are detected to go on-line and off-line by flap detectors, the cable operators can look at the flap list and spectrum tables to determine the possible causes.
ciscoCableSpectrumMIBCompliances	1.3.6.1.4.1.9.9.114.3.1
ciscoCableSpectrumMIBConformance	1.3.6.1.4.1.9.9.114.3
ciscoCableSpectrumMIBGroups	1.3.6.1.4.1.9.9.114.3.2
ciscoCableSpectrumMIBNotificationPrefix	1.3.6.1.4.1.9.9.114.2
ciscoCableSpectrumMIBObjects	1.3.6.1.4.1.9.9.114.1

RFC description

Monitors cable spectrum health, upstream noise, and modem flap detection on DOCSIS CMTS systems.

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