H3C Technologies H3C SecPath F1000-E - Manual (Page 420)

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Configuration procedure
To enable OSPF on a router, create an OSPF process and specify areas with which the process is
associated, and the network segments contained in each area. If an interface's IP address resides on a
network segment of an area, the interface belongs to the area and is enabled with OSPF, and OSPF
advertises the direct route of the interface.
To run OSPF, a router must have a router ID, which is the unique identifier of the router in the AS.
• You can specify a router ID when creating the OSPF process. Any two routers in an AS must have
different router IDs. In practice, the ID of a router is the IP address of one of its interfaces.
• If you specify no router ID when creating the OSPF process, the global router ID is used. H3C
recommends you to specify a router ID when you create the OSPF process.
OSPF can run multiple processes and supports VPNs:
• When a router runs multiple OSPF processes, you need to specify a router ID for each process,
which takes effect locally and has no influence on packet exchange between routers. Two routers
having different process IDs can exchange packets.
• OSPF support for VPNs enables an OSPF process to run in a specified VPN.
To enable OSPF:
Step Command Remarks
1. Enter system view. system-view N/A
2. Configure a global router ID. router id router-id
Optional.
Not configured by default.
If no global router ID is
configured, the highest
loopback interface IP address,
if any, is used as the router ID.
If no loopback interface IP
address is available, the
highest physical interface IP
address is used, regardless of
the interface status.
3. Enable an OSPF process and
enter OSPF view. ospf [ process-id | router-id router-id
| vpn-instance vpn-instance-name ] * Not enabled by default.
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
OSPF on the interface attached
to the network.
network ip-address wildcard-mask Not configured by default.