Brocade FastIron Ethernet Switch Layer 3 Routing Configuration Guide - Manual (Page 609)

Suppression of RIP advertisements
NOTE
Suppression of RIPng advertisements on Backup routers for the backup interface is not supported by
IPv6 VRRP v3 and IPv6 VRRP-E v3.
Normally, a VRRP or VRRP-E Backup includes route information for the virtual IP address (the backed-
up interface) in RIP advertisements. As a result, other routers receive multiple paths for the backed-up
interface and might sometimes unsuccessfully use the path to the Backup router rather than the path to
the Master.
You can prevent the Backup routers from advertising route information for the backed-up interface by
enabling suppression of the advertisements.
Suppressing RIP advertisements for the backed-up interface in Router 2
To suppress RIP advertisements for the backed-up interface in Router 2, enter the following commands.
device Router2(config)#router rip
device Router2(config-rip-router)#use-vrrp-path
Syntax: use-vrrp-path
The syntax is the same for VRRP and VRRP-E.
Hello interval configuration
The Master periodically sends Hello messages to the Backup routers. The Backup routers use the Hello
messages as verification that the Master is still online. If the Backup routers stop receiving the Hello
messages for the period of time specified by the dead interval, the Backup routers determine that the
Master router is dead. At this point, the Backup router with the highest priority becomes the new Master
router.
NOTE
The default dead interval is three times the Hello interval plus the Skew time. Generally, if you change
the Hello interval, you also should change the dead interval on the Backup routers.
To change the Hello interval on the Master to 10 seconds, enter the following commands.
device Router1(config)#interface ethernet 1/6
device Router1(config-if-1/6)#ip vrrp vrid 1
device Router1(config-if-1/6-vrid-1)#hello-interval 10
Syntax: [no] hello-interval seconds
The seconds variable specifies the Hello interval value from 1 through 84 seconds for IPv4 VRRP,
VRRP-E, and IPv6 VRRP-E and 1 through 40 seconds for IPv4 VRRPv3. The default is 1 second.
To change the Hello interval on the Master to 200 milliseconds for IPv6 VRRP, enter the following
commands.
device Router1(config)# interface ethernet 1/6
device Router1(config-if-1/6)# ipv6 vrrp vrid 1
device Router1(config-if-1/6-vrid-1)# hello-interval 200
Syntax: [no] hello-interval milliseconds
Suppression of RIP advertisements
FastIron Ethernet Switch Layer 3 Routing Configuration Guide 609
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