Chapter 19
| Unicast Routing
Configuring the Open Shortest Path First Protocol (Version 2)
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Parameters
These parameters are displayed:
◆ Process ID – Process ID as configured in the Network Area configuration screen
(see page 717).
◆ Area ID – Identifier for a stub.
◆ Default Cost – Cost for the default summary route sent into a stub from an area
border router (ABR). (Range: 0-16777215; Default: 0)
Note that he the default cost is set to “0,” the router will not advertise a default
route into the attached stub.
◆ Summary – Controls the use of summary routes.
■
Summary – Allows an Area Border Router (ABR) to send a summary link
advertisement into the stub area.
■
No Summary – Stops an ABR from sending a summary link advertisement
into a stub area.
Routing table space is saved in a stub by blocking Type-4 AS summary LSAs
and Type 5 external LSAs. This option can be used to completely isolate the
stub by also stopping an ABR from sending Type-3 summary LSAs that
advertise the default route for destinations external to the local area or the
autonomous system.
Define an area as a totally stubby area only if routers in the area do not
require summary LSAs from other areas.
Web Interface
To configure protocol settings for a stub:
1. Click Routing Protocol, OSPF, Area.
2. Select Configure Area from the Step list.
3. Select Configure Stub Area from the Action list.
4. Select a Process ID, and modify the routing behavior for a stub.
5. Click Apply
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