H3C Technologies H3C S12500-X Series Switches - Manual (Page 82)

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• If you specify a router ID when you create an OSPF process, any two routers in an AS must have
different router IDs. A common practice is to specify the IP address of an interface as the router ID.
• If you specify no router ID when you create the OSPF process, the global router ID is used. H3C
recommends specifying a router ID when you create the OSPF process.
OSPF supports multiple processes and VPNs:
• To run multiple OSPF processes, you must specify an ID for each process. The process IDs take effect
locally and has no influence on packet exchange between routers. Two routers with different
process IDs can exchange packets.
• You can configure an OSPF process to run in a specified VPN instance. For more information about
VPN, see MPLS Configuration Guide.
188B
Enabling OSPF on a network
Step Command Remarks
1. Enter system view. system-view N/A
2. (Optional.) Configure a
global router ID.
router id router-id
By default, no global router ID is configured.
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 (up or
down).
3. Enable an OSPF process
and enter OSPF view.
ospf [ process-id | router-id
router-id | vpn-instance
vpn-instance-name ] * By default, OSPF is disabled.
4. (Optional.) Configure a
description for the OSPF
process.
description description
By default, no description is configured for
the OSPF process.
H3C recommends configuring a description
for each OSPF process.
5. Create an OSPF area and
enter OSPF area view.
area area-id By default, no OSPF area is created.
6. (Optional.) Configure a
description for the area.
description description
By default, no description is configured for
the area.
H3C recommends configuring a description
for each OSPF area.
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 By default, no network is specified.
A network can be added to only one area.
189B
Enabling OSPF on an interface
Step Command Remarks
1. Enter system view. system-view N/A