Foundry Networks Switch and Router Installation And Configuration Manual page 827

This chapter describes how to configure Foundry routers to configure the following router redundancy protocols:
• Virtual Router Redundancy Protocol (VRRP) – The standard router redundancy protocol described in RFC
2338.
• VRRP Extended (VRRPE) – An enhanced version of VRRP that overcomes limitations in the standard
protocol.
NOTE: VRRP and VRRPE are separate protocols. You cannot use them together.
NOTE: You can use a Foundry Layer 3 Switch configured for VRRP with another Foundry Layer 3 Switch or a
third-party router that is also configured for VRRP. You can use a Foundry Layer 3 Switch configured for VRRPE
only with another Foundry Layer 3 Switch that also is configured for VRRPE.
Foundry Standby Router Protocol (FSRP), a Foundry router redundancy protocol available before VRRP or
VRRPE, is described in "Configuring FSRP" on page 22-1.
For a summary of how these three router redundancy protocols differ, see "Comparison of VRRP, VRRPE, and
FSRP" on page 21-8.
December 2000
Configuring VRRP and VRRPE
Chapter 21
21 - 1