3Com 7700 Configuration Manual page 88

80 C 5: R P
HAPTER OUTING
O
ROTOCOL PERATION
By default, OSPF is not enabled.
Enter OSPF Area View
Perform the following configurations in OSPF view.
Table 23 Enter OSPF Area View
Operation
Enter an OSPF area view
Delete a designated OSPF area
Specify Interface
OSPF divides the AS into different areas. You must configure each OSPF interface
to belong to a particular area, identified by an area ID. The areas transfer routing
information between them through the ABRs.
In addition, parameters of all the routers in the same area should be identical.
Therefore, when configuring the routers in the same area, please note that most
configurations should be based on the area. An incorrect configuration can disable
the neighboring routers from transmitting information, and lead to congestion or
self-loop of the routing information.
Perform the following configuration in OSPF Area view.
Table 24 Specify Interface
Operation
Specify an interface to run OSPF
Disable OSPF on the interface
You must specify the segment to which the OSPF will be applied after enabling the
OSPF tasks.
Configure Router ID
A router ID is a 32-bit unsigned integer that uniquely identifies a router within an
AS. A router ID can be configured manually. If a router ID is not configured, the
system selects the IP address of an interface automatically. When you set a router
ID manually, you must guarantee that the IDs of any two routers in the AS are
unique. A common undertaking is to make the router ID the same as the IP
address of an interface on the router.
Perform the following configurations in system view.
Table 25 Configure Router ID
Operation
Configure router ID
Remove the router ID
To ensure the stability of OSPF, the you must determine the division of router IDs
and manually configure them when implementing network planning.
Command
area area-id
undo area area-id
Command
network ip-address ip-mask
undo network ip-address ip-mask
Command
router id router-id
undo router id