The Extension MIB module for the CISCO-HSRP-MIB which is based on RFC2281. This MIB provides an extension to the CISCO-HSRP-MIB which defines Cisco's proprietary Hot Standby Routing Protocol (HSRP), defined in RFC2281. The extensions cover assigning of secondary HSRP ip addresses, modifying an HSRP Group's priority by tracking the operational status of interfaces, etc. Terminology: HSRP is a protocol used amoung a group of routers for the purpose of selecting an active router and a standby router. An active router is the router of choice for routing packets. A standby router is a router that takes over the routing duties when an active router fails, or when preset conditions have been met. A HSRP group or a standby group is a set of routers which communicate using HSRP. An HSRP group has a group MAC address and a group IP address. These are the designated addresses. The active router assumes (i.e. inherits) these group addresses. An HSRP group is identified by a ( ifIndex, cHsrpGrpNumber ) pair. BIA stands for Burned In Address.