HP VPN Firewall Appliances Network Management Configuration Guide

390
Ste
p
Command Remarks
4. Configure a description for
the OSPF process.
description description
Optional.
Not configured by default.
5. Configure an OSPF area
and enter OSPF area view.
area area-id Not configured by default.
6. Configure a description for
the area.
description description
Optional.
Not configured by default.
7. Specify a network to enable
the interface attached to the
network to run the OSPF
process in the area.
network ip-address
wildcard-mask
Not configured by default.
A network segment can belong to only one
area.
Configuring OSPF areas
After you split an OSPF AS into multiple areas, you can configure some areas as stub areas or NSSA
areas as needed.
If no connectivity can be achieved between the backbone and a non-backbone area, or within the
backbone itself, configure virtual links to solve it.
Configuration prerequisites
Before you configure an OSPF area, complete the following tasks:
• Configure IP addresses for interfaces to ensure IP connectivity between neighboring nodes.
• Enable OSPF.
Configuring a stub area
You can configure a non-backbone area at an AS edge as a stub area. To do so, issue the stub command
on all the routers attached to the area. The routing table size is reduced because Type-5 LSAs are not
flooded within the stub area. The ABR generates a default route into the stub area so all packets destined
outside of the AS are sent through the default route.
To further reduce the routing table size and routing information exchanged in the stub area, configure a
totally stub area by using the stub no-summary command on the ABR. AS external routes and inter-area
routes are not distributed into the area. All the packets destined outside of the area are sent to the ABR
for forwarding.
To configure an OSPF stub area:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter OSPF view.
ospf [ process-id | router-id
router-id | vpn-instance
vpn-instance-name ] *
N/A
3. Enter area view.
area area-id N/A