Generating A Default Route (Asbr) - HP ProCurve Secure Router 7203 dl Advanced Management And Configuration Manual

Using the Web Browser Interface for Advanced Configuration Tasks
Routing
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4. If so desired, check the Redistribute Static box to enable the router to
advertise routes manually added to its route table.
5. Check the Redistribute RIP box to redistribute routes discovered by RIP
into the OSPF protocol.
6. After you have selected the types of routes that you want to redistribute,
click Apply.

Generating a Default Route (ASBR)

An ASBR distributes external routes to routers in an OSPF network. Typically,
ASBR runs two routing protocols. For example, an ASBR that provides a
connection to the Internet could run BGP on its WAN interface and OSPF on
its LAN interfaces. A router that receives a default route from an external
network can also act as an ASBR.
If the ASBR provides the only external exit for your network, then it does not
need to send out a separate route for each external network. It can simply
advertise a default route for all external traffic.
The router can either advertise a default route that it receives from a server
in the external network, or it can advertise a default route that has been
manually added to its route table.
You should enable your router to advertise the default route when it provides
your network its exit to an external network such as the Internet.
A remote site is not an external network as long as it is part of your organiza-
tion's private network.
For example, when your router connects to a remote site that is part of your
private network, it does not have to be an ASBR. When your router connects
to the Internet, it should be an ASBR.
Follow these steps to advertise a default route:
1. Access the OSPF screen. (Select Routing under Router/Bridge in the
lefthand navigation bar. Click the Configure button for OSPF.)
2. Check the Default Information Originate box in the OSPF Configura-
tion window that displays. (See Figure 14-91 on page 14-119.)