HP ProCurve Secure Router 7203 dl Advanced Management And Configuration Manual page 713

4. Select the set of routes using a match command. You can use various
attributes to select routes, including the destination network address and
prefix length or community.
Classifying routes according to their destination address is the typical way
to group routes to one section of your network. Use a prefix list to select
these routes and then associate the prefix list with the route map entry.
Enter:
Syntax: match ip address prefix <listname>
5. Set the metric for the routes you have selected:
Syntax: set metric <value>
Enter a value between 0 and 429467295. Configure a lower metric than
that set for these routes in any other route map.
6. Configure a route map entry with the same name but different sequence
number for the set of routes to the next section of the network. Repeat
steps 3 through 5. You should configure a higher metric for these routes
than that you configured for the first set of routes.
Configure a route map entry for each section of the network.
7. Configure a route map with a new name for the second external neighbor.
Repeat steps 3 through 6. In this second route map, the set of routes that
received the higher metric in the first route map should receive a lower
metric, and one of the sets of routes that received the lower metric in the
first route map should now receive a higher metric.
Configure a separate route map for each neighbor.
If the secondary Internet connections are on different routers, simply
configure the route maps on these routers.
8. Apply the corresponding route map to each neighbor. Move to the config-
uration mode context for the BGP neighbor and enter this command:
Syntax: route-map <mapname> out
For example, your ProCurve Secure Router provides two Internet connections
to your network, which uses variable length subnets in the 10.1.0.0 /16 range.
You should enter these commands to set the multi-exit discriminators:
ProCurve(config)# ip prefix-list MultiExit1 seq 10 permit 10.1.0.0/17 le 24
ProCurve(config)# ip prefix-list MultiExit2 seq 10 permit 10.1.128.0/17 le 24
ProCurve(config)# route-map ISP1 10
ProCurve(config-route-map)# match ip address prefix MultiExit1
ProCurve(config-route-map)# set metric 160
ProCurve(config-route-map)# route-map ISP1 20
IP Routing—Configuring RIP, OSPF, BGP, and PBR
Configuring BGP
13-99