Enabling Ospf; Prerequisites; Configuration Procedure - 3Com S7906E Configuration Manual

Configuring OSPF
Graceful Restart
Configuring BFD for OSPF

Enabling OSPF

You need to enable OSPF before you can perform other OSPF configuration tasks.

Prerequisites

Before configuring OSPF, you have configured the link layer protocol, and IP addresses for interfaces,
making neighboring nodes accessible with each other at the network layer.

Configuration Procedure

To enable OSPF on a router, you need to 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 will be used. For
details about global Router ID, refer to IP Routing Basics in the IP Routing Volume. You are
recommended to specify a Router ID when creating the OSPF process.
The system supports OSPF multi-process and OSPF multi-instance:
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. Therefore,
two routers having different process IDs can exchange packets.
You can configure an OSPF process to run in a specified VPN instance.
Follow these steps to enable OSPF:
To do...
Enter system view
Enable an OSPF process and
enter its view
Task
Configuring OSPF to Give Priority to Receiving and
Processing Hello Packets
Configuring the LSU Transmit Rate
Configuring the OSPF GR Restarter
Configuring the OSPF GR Helper
Triggering OSPF Graceful Restart
Use the command...
System-view
ospf [ process-id |
router-id router-id |
vpn-instance
instance-name ] *
1-23
Remarks
—
Required
Not enabled by default.
Remarks
Optional
Optional
Optional
Optional
Optional
Optional