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• Advertise Default Route
the autonomous system (AS). (Options: NotAlways, Always; Default: NotAlways)
• Always – The router will advertise itself as a default external route for the local
AS, even if a default external route does not actually exist. (To define a default
route, see "Configuring Static Routes" on page 19-21.)
• NotAlways – It can only advertise a default external route into the AS if it has
been configured to import external routes through RIP or static routes, and such
a route is known. (See "Redistributing External Routes" on page 20-35.)
• External Metric Type
route. Type 1 route advertisements add the internal cost to the external route
metric. Type 2 routes do not add the internal cost metric. When comparing Type 2
routes, the internal cost is only used as a tie-breaker if several Type 2 routes have
the same cost. (Default: Type 2)
• Default External Metric
(Range: 1-65535; Default: 10)
The metric for the default external route is used to calculate the path cost for traffic
passed from other routers within the AS out through the ASBR.
Configuring the Open Shortest Path First Protocol
22
– The router can advertise a default external route into
22
– The external link type used to advertise the default
22
– The Metric assigned to the default route.
20
20-17
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