Dell FCX624-I Laptop User Manual


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916 PowerConnect B-Series FCX Configuration Guide
53-1002266-01
Configuring RIP parameters
28
These loop prevention methods are configurable on an individual interface basis. One of the
methods is always in effect on an interface enabled for RIP. If you disable one method, the other
method is enabled.
NOTE
These methods may be used in addition to the RIP maximum valid route cost of 15.
To disable poison reverse and enable split horizon on an interface, enter commands such as the
following.
PowerConnect(config)#interface ethernet 0/1/1
PowerConnect(config-if-0/1/1)#no ip rip poison-reverse
Syntax: [no] ip rip poison-reverse
To disable split horizon and enable poison reverse on an interface, enter commands such as the
following.
PowerConnect(config)#interface ethernet 0/1/1
PowerConnect(config-if-0/1/1)#ip rip poison-reverse
Suppressing RIP route advertisement on a VRRP or
VRRPE backup interface
NOTE
This section applies only if you configure the Layer 3 Switch for Virtual Router Redundancy Protocol
(VRRP) or VRRP Extended (VRRPE). Refer to Chapter 31, “Configuring VRRP and VRRPE”.
Normally, a VRRP or VRRPE 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.
PowerConnect(config)#router rip
PowerConnect(config-rip-router)#use-vrrp-path
Syntax: [no] use-vrrp-path
The syntax is the same for VRRP and VRRPE.
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.