Configuration Guide User guide

FastIron Configuration Guide 1203
53-1002494-01
RIP parameter configuration
Enabling ECMP for routes in RIP
ECMP for routes in RIP is disabled by default. Use the ecmp-enable command to enable the feature
at the router rip level.
Brocade(config-rip-router)#ecmp-enable
Syntax: [no] ecmp-enable
Configuring metric parameters
By default, a Brocade Layer 3 Switch port increases the cost of a RIP route that is learned on the
port by one. You can configure individual ports to add more than one to a learned route cost. In
addition, you can configure a RIP offset list to increase the metric for learned or advertised routes
based on network address.
Changing the cost of routes learned on a port
By default, a Brocade Layer 3 Switch port increases the cost of a RIP route that is learned on the
port. The Layer 3 Switch increases the cost by adding one to the route metric before storing the
route.
You can change the amount that an individual port adds to the metric of RIP routes learned on the
port. To do so, use the following method.
NOTE
RIP considers a route with a metric of 16 to be unreachable. Use this metric only if you do not want
the route to be used. You can prevent the Layer 3 Switch from using a specific port for routes learned
though that port by setting its metric to 16.
To increase the cost a port adds to RIP routes learned in that port, enter commands such as the
following.
Brocade(config)#interface ethernet 0/6/1
Brocade(config-if-0/6/1)#ip metric 5
These commands configure port 6/1 to add 5 to the cost of each route learned on the port.
Syntax: ip metric <1-16>
Configuring a RIP offset list
A RIP offset list allows you to add to the metric of specific inbound or outbound routes learned or
advertised by RIP. RIP offset lists provide a simple method for adding to the cost of specific routes
and therefore biasing the Layer 3 Switch route selection away from those routes.
A RIP offset list consists of the following parameters:
• An access control list (ACL) that specifies the routes to which to add the metric.
• The direction:
- In applies to routes the Layer 3 Switch learns from RIP neighbors.
- Out applies to routes the Layer 3 Switch is advertising to its RIP neighbors.
• The type and number of a specific port to which the RIP offset list applies (optional).