Cisco Cisco IOS Software Release 12.0(22)S

This section describes the level of synchronization supported by the MIBs Cisco IOS release 12.0(22)S. 
MIBs that are not listed in this section do not synchronize data between the redundant units. MIB 
synchronization for SSO only occurs when the system is in SSO mode.

SSO MIB support has three parts:

SNMP Configuration MIBs

Core MIBs

CISCO-RF-MIB

All the objects in the following MIBs that contain SNMP configuration data are synchronized between 
the active and standby RPs:

SNMP-FRAMEWORK-MIB

SNMP-TARGET-MIB

SNMP-USM-MIB

SNMP-VACM-MIB

SNMPv2-MIB

Core MIBs are as follows:

ENTITY-MIB—After a switchover, there will be no change in the data reported by the 
ENTITY-MIB object. This lack of change is result of the entPhysicalIndex and its associated objects 
being synchronized between the active and the standby RPs. The associated objects of the 
entPhysicalIndex are as follows:

entPhysicalAlias

entPhysicalSerialNum

entPhysicalAssetID 

entLastChangeTime

IF-MIB—The ifIndex is synchronized between the active and standby RPs, along with the 
ifNumber, ifTableLastChange, ifAdminStatus, ifLinkUpDownTrapEnable, ifAlias, ifLastChange, 
and ifStackLastChange objects.

The CISCO-RF-MIB provides configuration control and status for the redundancy facility (RF) 
subsystem. The CISCO-RF-MIB has been modified to support SSO functionality. A new cRFHistory 
subgroup has been added in this release. The subgroup consists of one table 
(cRFHistorySwitchOverTable) and three objects (cRFHistoryTableMaxLength, cRFHistoryColdStarts, 
and cRFHistoryStandbyAvailTime), as follows: