Setting The Router Id - HP 7102dl - ProCurve Secure Router Configuration Manual

IP Routing—Configuring RIP, OSPF, BGP, and PBR
Configuring BGP
N o t e
15-74
Therefore, when you advertise a network or range of networks, you must
verify that the routing table includes the exact route that you have specified
(including the same subnet mask or corresponding prefix length.)
If the routing table does not include this route, you must configure a null route.
For example, Router A's routing table only includes routes to the 24-bit
networks, not to the 20-bit network that contains them all. You must manually
add a route to network 10.1.0.0 /20 so that the BGP interface can advertise it.
Enter the route from the global configuration mode context. Use the null
keyword for the next-hop address:
ProCurve(config)# ip route 10.1.0.0 /20 null 0
You do not have to worry about the router misdirecting local traffic because
the router always uses the most specific entry in the table to route packets.
If you want to send certain routes to one neighbor but not another, you must
apply an outbound prefix list filter to the neighbor. (See "Creating Prefix Lists:
Configuring Filters for Route Exchange" on page 15-81 or "Defining the Routes
that a Router Can Advertise" on page 15-92.)

Setting the Router ID

The BGP interface identifies itself to neighbors with its router ID. Often this
ID is the IP address of the logical interface that connects to each neighbor. It
can also be the address of a loopback interface used as the update source.
(Having a loopback interface as the update source ensures that a BGP session
stays open even if one connection goes down.)
To specify the router ID, enter the following command from the BGP config-
uration mode context:
Syntax: bgp router-id <A.B.C.D>
For example:
ProCurve(config-bgp 1)# bgp router-id 10.1.1.1