Ospf Area Attribute Configuration - Huawei Quidway S5600 Series Operation Manual

Operation Manual – Routing Protocol
Quidway S5600 Series Ethernet Switches-Release 1510
Table 4-2 Basic OSPF configuration
Enter system view
Configure the router ID
Enable OSPF and enter OSPF
view
Enter OSPF area view
Configure the network segments
in the area
Note:
The ID of an OSPF process or OSPF multi-instance is unique. That is, the ID of
OSPF multi-instance must be different from any in-use process ID.
One segment can belong to only one area and you must specify each OSPF
interface to belong to a particular area.

4.4 OSPF Area Attribute Configuration

Area partition in OSPF reduces the number of LSAs in the network and enhances
OSPF scalability. To further reduce routing table size and the number of LSAs in some
non-backbone areas on the edge of the AS, you can configure these areas as stub
areas.
A stub area cannot import any external route. For this reason the concept of NSSA area
is introduced. Type7 LSAs can be advertised in an NSSA area. Type7 LSAs are
generated by ASBRs of the NSSA area, and will be transformed into AS-external LSAs
whey reaching ABRs in the NSSA area, which will then be advertised to other areas.
After area partition, the OSPF route updates between non-backbone areas are
exchanged by way of the backbone area. Therefore, OSPF requires that all the
Operation
Huawei Technologies Proprietary
Command
system-view
router id router-id
ospf [ process-id
[ router-id router-id ] ]
area area-id
network address
wildcard-mask
4-11
Chapter 4 OSPF Configuration
Description
—
Optional
If multiple OSPF
processes run on a
router, you
recommended to use
the router-id keyword
in the following
command to specify
different router IDs for
different processes.
Required
Enter OSPF view.
Required
Required
By default,
interface does
belong to any area.
are
an
not