Brocade FastIron Ethernet Switch Layer 3 Routing Configuration Guide - Manual (Page 591)

feature, make sure the track priorities are always lower than the VRRP priorities. The default track
priority for the router that owns the VRID IP addresses is 2. The default track priority for Backup routers
is 1. If you change the track port priorities, make sure you assign a higher track priority to the Owner of
the IP addresses than the track priority you assign on the Backup routers.
Suppression of RIP advertisements for backed-up interfaces
The Brocade implementation also enhances VRRP by allowing you to configure the protocol to
suppress RIP advertisements for the backed-up paths from Backup routers. Normally, a VRRP Backup
router includes route information for the interface it is backing up in RIP advertisements. As a result,
other routers receive multiple paths for the interface and might sometimes unsuccessfully use the path
to the Backup router rather than the path to the Master router. If you enable the Brocade
implementation of VRRP to suppress the VRRP Backup routers from advertising the backed-up
interface in RIP, other routers learn only the path to the Master router for the backed-up interface.
Authentication
The Brocade implementations of VRRP and VRRP-E can use simple passwords to authenticate VRRP
and VRRP-E packets. VRRP-E can also use HMAC-MD5-96 to authenticate VRRP-E packets.
VRRP and VRRP-E authentication is configured on the router interfaces. The VRRP authentication
configuration of every router interface must match. For example, if you want to use simple passwords to
authenticate VRRP traffic within a router, you must configure VRRP simple password authentication
with the same password on all of the participating router interfaces.
NOTE
The HMAC-MD5-96 authentication type is supported for VRRP-E, but not supported for VRRP.
NOTE
Authentication is not supported for VRRP v3.
Independent operation of VRRP alongside RIP, OSPF, and BGP4
VRRP operation is independent of RIP, OSPF, and BGP4; therefore, RIP, OSPF, and BGP4 are not
affected if VRRP is enabled on one of these interfaces.
Dynamic VRRP configuration
All VRRP global and interface parameters take effect immediately. You do not need to reset the system
to place VRRP configuration parameters into effect.
VRRP-E overview
The most important difference between VRRP and VRRP-E is that all VRRP-E routers are Backup
routers; there is no Owner router. VRRP-E overcomes the limitations in standard VRRP by removing
the Owner.
The following points explain how VRRP-E differs from VRRP:
• Owners and Backup routers
Suppression of RIP advertisements for backed-up interfaces
FastIron Ethernet Switch Layer 3 Routing Configuration Guide 591
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