CISCO-APPLIANCE-REDUNDANCY-MIB

Description: Manages high-availability redundancy state and failover on Cisco appliance platforms.

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CISCO-APPLIANCE-REDUNDANCY-MIB is a Cisco proprietary MIB that manages high-availability redundancy between an active and standby appliance pair, covering configuration of synchronization timing and the operational redundancy state. Its data spans configuration (sync interval, check interval, virtual/local/peer addresses) and status/fault categories (current redundancy state and notification enablement), making it a software-status MIB centered on failover readiness rather than physical hardware. From a monitoring perspective it is used to confirm the standby appliance is properly synchronized with the active one and to detect a state transition (failover) as soon as it occurs, which is critical since a stale standby means data loss risk on failover. It does not appear to depend heavily on other MIBs, being a self-contained redundancy-management module built around Cisco's appliance HA architecture. It is typically deployed on paired Cisco appliances (such as content or service appliances) configured in an active/standby high-availability cluster, with a CISCO-APPLIANCE-REDUNDANCY-MIB download typically bundled with the appliance's management software for import into standard SNMP tools.

An operator polls carRedundancyState to confirm the pair is in a healthy active/standby state and checks carRedundancySyncInterval against carRedundancyCheckInterval to ensure synchronization is occurring frequently enough for the deployment's tolerance for data loss. Walking carHAAddressTable / carHAAddressEntry reveals the configured carVirtualAddress, carMyAddress, and carPeerAddressType/carPeerAddress bindings, letting an admin verify the HA pair is using the expected virtual IP for client-facing traffic. An unexpected change in carRedundancyState combined with carNotificationEnabled would trigger a trap indicating an unplanned failover event requiring investigation.

Cisco MIB for monitoring failover and redundancy status of Cisco appliances in high-availability deployments. Supports stateless Active/Backup configurations and redundancy facility (RF) subsystem management.