FTOS Configuration Guide for the C-Series - Force10 Networks

Control RIP routing updates
By default, RIP broadcasts routing information out all enabled interfaces, but you can configure RIP to
send or to block RIP routing information, either from a specific IP address or a specific interface. To
control which devices or interfaces receive routing updates, you must configure a direct update to one
router and configure interfaces to block RIP updates from other sources.
To control the source of RIP route information, use the following commands, in the ROUTER RIP mode:
Command Syntax Command Mode Purpose
neighbor ip-address ROUTER RIP Define a specific router to exchange RIP
information between it and the Force10 system.
You can use this command multiple times to
exchange RIP information with as many RIP
networks as you want.
passive-interface interface ROUTER RIP Disable a specific interface from sending or
receiving RIP routing information.
Another method of controlling RIP (or any routing protocol) routing information is to filter the information
through a prefix list. A prefix lists is applied to incoming or outgoing routes. Those routes must meet the
conditions of the prefix list; if not, FTOS drops the route. Prefix lists are globally applied on all interfaces
running RIP. Configure the prefix list in the PREFIX LIST mode prior to assigning it to the RIP process.
For configuration information on prefix lists, see Chapter 17, IP Access Control Lists, Prefix Lists, and
Route-maps, on page 333.
To apply prefix lists to incoming or outgoing RIP routes, use the following commands in the ROUTER
RIP mode:
Command Syntax Command Mode Purpose
distribute-list prefix-list-name in ROUTER RIP Assign a configured prefix list to all
incoming RIP routes.
distribute-list prefix-list-name out ROUTER RIP Assign a configured prefix list to all
outgoing RIP routes.
In addition to filtering routes, you can add routes from other routing instances or protocols to the RIP
process. With the redistribute command syntax, you can include OSPF, static, or directly connected
routes in the RIP process.
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