RDN-CABLE-SPECTRUM-MIB: View SNMP OID List / Download MIB

This is the MIB Module for Cable Spectrum Management for MCNS compliant Cable Modem Termination Systems (CMTS).

This table keeps the status of the flap modems for per CMTS.

List of attributes for an entry in the rdnFlapCmCmtsStatusTable.

The CMTS Interface Index.

The maximum number of flap modems. The user could configure this number according to the number of downstreams and the number of modem line cards in the CMTS. The number can range from 1 to 8191. The default value is 100. When the number of modems exceeds the max flap list size, the additional modems are ignored.

The current number of modems in the flap list. Its value will be less than or equal to flapListMaxSize.

The age out time in minutes for modems in the flap table. The number of minutes range from 1 to 86400. The default value is 1440.

The interval of time that begins when the cable modem initially ranges, reboots, and ends when it starts initial maintenance again. If the interval of time is less than what is specified in flapInsertionTime, the flapCmInsertionFails and cmFlapCounts will increment. The valid range is from 1 to 86400 seconds. The default value is 60.

Specifies the maximum threshold for the number of consecutive miss counts during a polling cycle. If the flap miss counts goes over this threshold, the modem will be added into the flap list. Polling is maintained between the CMTS and the cable modem every 10 seconds. The flapMissThreshold specifies the maximum number of consecutive missed counts during one station maintenance poll interval. If there are more than 16 consecutive miss counts during one polling cycle, the modem will de-insert and attempt to range again. The value ranges from 1 to 12 consecutive counts. The default value is 6.

The power adjustment threshold for a CM to raise and lower it's transmit power during normal operation. When a modem's power adjustment goes above or below the flapPowerAdjThreshold the CM will be added into the flap list. The flapCmPowerAdjustments and cmFlapCounts will be incremented as well. flapPowerAdjThreshold values of 2 dB and below are low enough to continuously increment the flapCmPowerAdjustments under normal conditions. The values range from 1 to 10. The default is 2.

The percentage CM miss threshold. If CM miss percentage goes over this threshold and flapListTrapEnable is set, a flap list trap will be send out to notify this event

This object controls flap list trap. If its value is set to enabled(1), a trap will be sent out when the CM miss percentage goes over the flapListPercentageThreshold; Otherwise no flap list trap will be sent out. By default, this object has the value enabled(1). Enumeration: 'disabled': 2, 'enabled': 1.

This table keeps the records of modem state changes. An entry can be deleted from the table but can not be added to the table.

List of attributes for an entry in the rdnFlapTable.

Index for Cable Modem.

The CMTS Interface Index.

MAC address of the Cable Modem's Cable interface. Identifies a flap-list entry for a flapping Cable Modem.

The ifIndex of the Cable upstream interface whose ifType is docsCableUpstream(129). The CMTS detects a flapping Cable Modem from its Cable upstream interface.

The ifIndex of the Cable downstream interface whose ifType is docsCableDownstream(128).

When the Cable Modem initially ranges, reboots and initially ranges again within the specified insertion time, this counter will increment. The cmFlapCounts increment along with this counter.

The number of times the CMTS receives the Ranging request from the Cable Modem.

The number of times the CMTS misses the Ranging request from the Cable Modem. The CMTS can check up to 16 consecutive times for a ranging request message during one polling cycle. Misses are not desirable since this is usually an indication of a return path problem; however, having a small number of misses is normal. Ideally, the Hit should be much greater than the Miss counts.

When the power adjustment changed above or below the power adjustment threshold this counter will increment. The Flap Count (cmFlapCounts) will increment when this counter increments.

The total number of times a CM flaps Under following three situations, this counter will increase: (1) When flapCmInsertionFails is increased the flap counts will increase. (2) When the CMTS receives the number of consecutive misses specified in the flapMissThreshold, the flap counts will increase. (3) When flapPowerAdjustments is increased the flap counts will increase.

The last time stamp cm flaps

The time stamp when new flap CM is added to the table.

Controls and reflects the status of rows in this table. When a new flap cable modem is detected, and does not exist in flap list and flapListCurrentSize is less than flapListMaxSize, an entry will be created in this table. The 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 if they are aged out. The age out time is defined in flapAgingOutTime When a row is set to destroy(6), it will remove the entry immediately. To prevent an entry from being aged out, the entry should be set to notInService(2). The entry will remain in the table until this instance is set to destroy. The user is allowed set an entry from active to notInService or from notInService to destroy A user is not allowed to change a notInService entry to active. createAndGo(4) and createAndWait(5) are not supported.

a flap list trap signifies that SNMPv2 entity, acting in an agent role, has detected that the percentage of flap cm for one of the cmts board has gone over the flapListPercentageThreshold

Reason for flapping power - The power threshold was exceeded. ranging - Missing ranging requests went beyond threshold insertion - Modem re-ranged within insertion time threshold. This is a place holder for the reason parameter for the modem to go into flap list. This should return ZERO when read. This just allows us to include a flapping reason in the modem flap trap varbind. Enumeration: 'insertion': 3, 'ranging': 2, 'power': 1.

This Trap will be sent whenever the modem goes into the flapping list for some reason. 'flapCmMacAddress' gives the Mac Address of the modem. 'flapTrapType' gives the cause for the modem to go into the flap list.

The compliance statement for devices that implement MCNS compliant Radio Frequency Interfaces and Spectrum Management features.

Group of objects implemented in Cable Modem Termination Systems providing Flap List information.