VRRP: Increasing Reliability and Failover with the Virtual Router Redundance Protocol

2.9. Failure Cases

So far we have been discussing different scenarios to illustrate how VRRP's switchover mechanism kicks in under different configurations. It may also be informative to look at different failure points in our context and indicate in which cases VRRP is of help and in which cases tools other than VRRP are required. To list all possible failure points, we start with our R1 router that acts as the master of the V1 virtual router. Figure 2-10 depicts the points of failure on R1.

Figure 2-10. Points of failure around a router

f0 indicates the failure of the R1 as a whole. Different causes may lead to such a failure: the crash of the ...