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Alteon OS Application Guide
176
Chapter 11: Border Gateway Protocol 42C4911, January 2007
Precedence
You can set a priority to a route map by specifying a precedence value with the following
command:
The smaller the value the higher the precedence. If two route maps have the same precedence
value, the smaller number has higher precedence.
Configuration Overview
To configure route maps, you need to do the following:
1. Define network filter.
Enter a filter number from 1 to 256. Specify the IP address and subnet mask of the network that
you want to match. Enable the network filter. You can distribute up to 256 network filters
among 32 route maps each containing eight access lists.
2. (Optional) Define the criteria for the access list and enable it.
Specify the access list and associate the network filter number configured in Step 1.
Steps 2 and 3 are optional, depending on the criteria that you want to match. In Step 2, the net-
work filter number is used to match the subnets defined in the network filter. In Step 3, the
autonomous system number is used to match the subnets. Or, you can use both (Step 2 and Step
3) criteria: access list (network filter) and access path (AS filter) to configure the route maps.
>> /cfg/l3/rmap <x>/pre (Specify a precedence)
>> # /cfg/l3/nwf 1 (Specify a network filter number)
>> IP Network Filter 1#
addr <IP address> (Specify network address)
>> IP Network Filter 1#
mask <IP mask> (Specify network mask)
>> IP Network Filter 1#
ena (Enable network filter)
>> #
/cfg/l3/rmap 1 (Specify a route map number)
>> IP Route Map 1#
alist 1 (Specify the access list number)
>> IP Access List 1#
nwf 1 (Specify the network filter number)
>> IP Access List 1#
metric (Define a metric)
>> IP Access List 1#
action deny (Specify action for the access list)
>> IP Access List 1#
ena (Enable the access list)