Configuring Ospf Basic Functions; Prerequisites; Configuration Procedure - 3Com MSR 50 Series Configuration Manual

Configuring OSPF
Basic Functions

Prerequisites

Configuration Procedure

Task
"Configuring OSPF Graceful
Restart" on page 952
You need to enable OSPF, specify an interface and area ID first before performing
other tasks.
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.
To ensure OSPF stability, you need to decide on router IDs and configure them
manually. Any two routers in an AS must have different IDs. In practice, the ID of a
router is the IP address of one of its interfaces.
The system supports OSPF multi-process. When a router runs multiple OSPF
processes, you need to specify an ID for each process, which takes effect locally
and has no interference on packet exchange between routers. Therefore, two
routers having different process IDs can exchange packets.
The system supports OSPF multi-instance. You can configure an OSPF process to
run in a specified VPN instance to configure an association between the two.
The configurations for routers in an area are performed on the area basis. Wrong
configurations may cause communication failures, even routing information block
or routing loops between neighboring routers.
Follow these steps to configure OSPF basic functions:
To do...
Enter system view
Enable OSPF and enter its
view
Configure a description for
the OSPF process
Configure an OSPF area and
enter OSPF area view
Configure a description for
the area
Specify a network for the area
to enable OSPF on the
interface attached to the
network

Configuring OSPF Basic Functions

"Configuring the OSPF GR
Restarter" on page 952
"Configuring the OSPF GR
Helper" on page 953
"Triggering OSPF Graceful
Restart" on page 953
Use the command...
system-view
ospf [ process-id | router-id
router-id | vpn-instance
instance-name ] *
description description
area area-id
description description
network ip-address
wildcard-mask
939
Description
Optional
Optional
Optional
Remarks
-
Required
Not enabled by default
Optional
Not configured by default
Required
Not configured by default
Optional
Not configured by default
Required
Not configured by default