Gigabit Ethernet Switch User's Manual

WGS3 Layer 3 Switch User’s Manual
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Parameter Description
Area ID An OSPF area identifier configured for a group of OSPF routers. (For information
on how to assign this identifier to a specific interface, see4.5.6.1.5 Configuring
OSPF.)
Type Indicates area type:
Normal – An area which can send or receive external route information.
Stub – An area which cannot send or receive external route information. It relies
on a single default route provided by its Area Border Router (ABR) to access
destinations outside of the stub. A stub can be used to reduce the amount of
topology data that has to be exchanged over the network.
NSSA – A not so stubby area cannot send but can receive external route
information. The ABR imports external routes and floods this information to all
routers within the NSSA.
An Autonomous System Boundary Router (ASBR) can import external routes and flood this information
to the entire Autonomous System.
NOTE: To add a new Area ID, use the <Add> button. (The default 0.0.0.0 indicates the OSPF
backbone.) To modify or delete an existing Area ID, highlight the table entry with the cursor and
select Enter.