Brocade Communications Systems Layer 3 Routing Configuration ICX 6650 - Manual (Page 169)

Brocade ICX 6650 Layer 3 Routing Configuration Guide 151
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RIP parameter configuration
To disable split horizon and enable poison reverse on an interface, enter commands such as the
following.
Brocade(config)#interface ethernet 1/1/1
Brocade(config-if-e10000-1/1/1)#ip rip poison-reverse
Suppressing RIP route advertisement on a VRRP or
VRRP-E backup interface
NOTE
This section applies only if you configure the Layer 3 Switch for Virtual Router Redundancy Protocol
(VRRP) or VRRP Extended (VRRP-E). Refer to
Chapter 9, “VRRP and VRRP-E” .
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 rather
than the path to the master.
You can prevent the backups from advertising route information for the backed-up interface by
enabling suppression of the advertisements.
To suppress RIP advertisements for the backed-up interface, enter the following commands.
Brocade(config)#router rip
Brocade(config-rip-router)#use-vrrp-path
Syntax: [no] use-vrrp-path
The syntax is the same for VRRP and VRRP-E.
Configuring RIP route filters
You can configure RIP route filters to permit or deny learning or advertising of specific routes.
Configure the filters globally, then apply them to individual interfaces. When you apply a RIP route
filter to an interface, you specify whether the filter applies to learned routes (in) or advertised
routes (out).
NOTE
A route is defined by the destination IP address and network mask.
NOTE
By default, routes that do not match a route filter are learned or advertised. To prevent a route from
being learned or advertised, you must configure a filter to deny the route.
To configure RIP filters, enter commands such as the following.
Brocade(config-rip-router)#filter 1 permit 192.168.4.1 255.255.255.0
Brocade(config-rip-router)#filter 2 permit 192.168.5.1 255.255.255.0
Brocade(config-rip-router)#filter 3 permit 192.168.6.1 255.255.255.0
Brocade(config-rip-router)#filter 4 deny 192.168.7.1 255.255.255.0
These commands explicitly permit RIP routes to three networks, and deny the route to one network.
Because the default action is permit, all other routes (routes not explicitly permitted or denied by
the filters) can be learned or advertised.