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PowerConnect B-Series FCX Configuration Guide 911
53-1002266-01
Configuring RIP parameters
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PowerConnect(config)#interface ethernet 0/6/1
PowerConnect(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).
The software adds the offset value to the routing metric (cost) of the routes that match the ACL. If
a route matches both a global offset list and an interface-based offset list, the interface-based
offset list takes precedence. The interface-based offset list metric is added to the route in this
case.
You can configure up to 24 global RIP offset lists and up to 24 RIP offset lists on each interface.
To configure a global RIP offset list, enter commands such as the following.
PowerConnect(config)#access-list 21 deny 160.1.0.0 0.0.255.255
PowerConnect(config)#access-list 21 permit any
PowerConnect(config)#router rip
PowerConnect(config-rip-router)#offset-list 21 out 10
The commands in this example configure a standard ACL. The ACL matches on all IP networks
except 160.1.x.x. When the Layer 3 Switch advertises a route that matches ACL 21, the offset list
adds 10 to the route metric.
Syntax: [no] offset-list <ACL-number-or-name> in | out [ethernet <port>]
Specify the <port> variable in the following formats:
• PowerConnect B-Series FCX stackable switches – <stack-unit/slotnum/portnum>
In the following example, the Layer 3 Switch uses ACL 21 to add 10 to the metric of routes received
on Ethernet port 0/2/1.
PowerConnect(config-rip-router)#offset-list 21 in 10 ethernet 0/2/1
Changing the administrative distance
By default, the Layer 3 Switch assigns the default RIP administrative distance (120) to RIP routes.
When comparing routes based on administrative distance, the Layer 3 Switch selects the route with
the lower distance. You can change the administrative distance for RIP routes.