Configuration Guidelines; Enabling Ospf On A Network - HP FlexFabric 12900E Series Configuration Manual

Configuration guidelines

To enable OSPF on an interface, you can enable OSPF on the network where the interface resides
or directly enable OSPF on that interface. If you configure both, the latter takes precedence.
You can specify a global router ID, or specify a router ID when you create an OSPF process.
•
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. As
a best practice, specify 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.

Enabling OSPF on a network

Step
1. Enter system view.
2. (Optional.)
global router ID.
3. Enable an OSPF process
and enter OSPF view.
4. (Optional.)
description for the OSPF
process.
5. Create an OSPF area and
enter OSPF area view.
6. (Optional.)
description for the area.
7. Specify
enable
attached to the network to
run the OSPF process in
the area.
Command
system-view
Configure a
router id router-id
ospf [ process-id | router-id
router-id
vpn-instance-name ] *
Configure a
description text
area area-id
Configure a
description text
a network to
the interface
network
wildcard-mask
Remarks
N/A
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,
interface
regardless of the interface status (up
or down).
vpn-instance
| By default, OSPF is disabled.
By default, no description is configured
for the OSPF process.
As a best practice, configure a
description for each OSPF process.
By default, no OSPF areas exist.
By default, no description is configured
for the area.
As a best practice, configure a
description for each OSPF area.
By default, no network is specified.
ip-address
A network can be added to only one
area.
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the highest physical
IP address is used,