Brocade Multi-Service IronWare Routing Configuration Guide (Supporting R05.6.00) - Manual (Page 809)

Multi-Service IronWare Routing Configuration Guide 781
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Overview of VRRP
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
For backward compatibility, VRRP can use simple passwords to authenticate VRRP packets. The
VRRP authentication type is not a parameter specific to the VRID. Instead, VRRP uses the
authentication type associated with the interfaces on which you define the VRID. For example, if
you configure your router interfaces to use a simple password to authenticate traffic, VRRP uses
the same simple password, and VRRP packets that do not contain the password are dropped. If
your interfaces do not use authentication, neither does VRRP.
NOTE
The MD5 authentication type is not supported by VRRP.
NOTE
Authentication is not supported by VRRP v3.
Forcing a Master router to abdicate to a standby router
You can force a VRRP Master router to abdicate (give away control) of a virtual router to a Backup
router by temporarily changing the Master router’s priority to a value of the Backup router. When
you change the priority of a VRRP Owner, the change takes effect only for the current power cycle.
The change is not saved to the startup configuration file when you save the configuration and is not
retained across a reload or reboot. Following a reload or reboot, the VRRP Owner again has priority
255.
VRRP alongside RIP, OSPF, and BGP4
VRRP operation is independent of the RIP, OSPF, and BGP4 protocols. Their operation is unaffected
when VRRP is enabled on a RIP, OSPF, or BGP4 interface.