666 BigIron RX Series Configuration Guide53-1001810-01Configuring RIP parameters24Enabling RIPRIP is disabled by default. To enable RIP, you must enable it globally and also on individualinterfaces on which you want to advertise RIP. Globally enabling the protocol does not enable it onindividual interfaces. You can enable the protocol on physical interfaces as well as virtual routinginterfaces. When you enable RIP on a port, you also must specify the version (version 1 only,version 2 only, or version 1 compatible with version 2).To enable RIP globally, enter the following command.BigIron RX(config)# router ripSyntax: [no] router ripAfter globally enabling the protocol, you must enable it on individual interfaces. To enable RIP on aninterface, enter commands such as the following.BigIron RX(config)# interface ethernet 1/1BigIron RX(config-if-e1000-1/1)# ip rip v1-onlySyntax: [no] ip rip v1-only | v1-compatible-v2 | v2-onlyConfiguring metric parametersBy default, a BigIron RX port increases the cost of a RIP route that is learned or advertised on theport by one. You can configure individual ports to add more than one to a learned or advertisedroute’s cost.Changing the cost of routes learned or advertised on a portBy default, a device port increases the cost of a RIP route that is learned on the port. The deviceincreases the cost by adding one to the route’s metric before storing the route.You can change the amount that an individual port adds to the metric of RIP routes learned on theport.To increase the metric for learned routes, enter commands such as the following.BigIron RX(config-if-e1000-1/1)# ip rip metric-offset 5 inThe command configures port 1/1 to add 5 to the cost of each route it learns.Syntax: [no] ip rip metric-offset in | outThe number is 1-16. A route with a metric of 16 is unreachable. Use 16 only if you do not want theroute to be used. In fact, you can prevent the device from using a specific port for routes learnedthough that port by setting its metric to 16.In applies to routes the port learns from RIP neighbors.Out applies to routes the port advertises to its RIP neighbors.Changing the administrative distanceBy default, the device assigns the default RIP administrative distance (120) to RIP routes. Whencomparing routes based on administrative distance, the device selects the route with the lowerdistance. You can change the administrative distance for RIP routes.
