A redundancy group consists of two or more objects of the same type that are configured in such a way as to provide backup resources for critical network objects. For example, two routers accessing the same host may be modeled as a redundancy group containing the two routers. If one router fails, the redundancy is “at risk.” If both fail, all capability is lost.

IP Availability Manager supports the creation and analysis of redundancy groups for the following objects:

  • CardRedundancyGroup — Consists of two or more Card objects that participate in a redundant configuration.

  • NetworkAdapterRedundancyGroup — Consists of two or more Port or Interface objects that participate in a redundant configuration.

  • NetworkConnectionRedundancyGroup — Consists of two or more NetworkConnection, Cable, or TrunkCable objects that participate in a redundant configuration. NetworkConnectionRedundancyGroups (NCRG) are simply reference classes, they are not created during discovery. There is only one relationshipset: ComposedOf/PartOf between members of the NetworkConnection class. If that is populated, the typical events (ReducedRedundancy, AtRisk, AllComponentsDown) work as expected.

  • SystemRedundancyGroup — Consists of two or more system (Switch, Router, Hub, Bridge, Host) objects that participate in a redundant configuration.

  • HSRPGroup — Consists of two or more Cisco devices that support the Hot Standby Router Protocol (HSRP) and are configured to ensure that user traffic recovers immediately and transparently from first hop failures in network edge devices or access circuits. The devices are connected to the same segment of a network and, using HSRP, work together to present the appearance of a single router on the LAN. The devices in an HSRPGroup share an IP address and a MAC (Layer 2) address.

  • VRRPGroup — Consists of two or more VRRP enabled routers. The VRRPGroup is created for each Virtual Router Identifier (VRID) and is composed of a logical element defined per interface per VRRPGroup on a VRRP router called VRRPEndpoint. VRRPEndpoints belonging to the same VRRPGroup (that is, having the same VRID) have a common virtual IP and a Virtual MAC. The Virtual MAC is defined as xx-xx-xx-xx-xx-VRID.