LevelOne GTL-2691 - Manual (Page 1478)

C HAPTER 49 | IP Routing Commands
Open Shortest Path First (OSPFv2)
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◆ 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.
◆ When you use this command to redistribute routes into a routing
domain (i.e., an Autonomous System, this router automatically
becomes an Autonomous System Boundary Router (ASBR). However,
an ASBR does not, by default, generate a default route into the routing
domain.
■
If you use the always keyword, the router will advertise itself as a
default external route into the AS, even if a default external route
does not actually exist. To define a default route, use the ip route
command.
■
If you do not use the always keyword, the router can only
advertise a default external route into the AS if the redistribute
command is used to import external routes via RIP or static routing,
and such a route is known.
◆ 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.
◆ This command should not be used to generate a default route for a stub
or NSSA. To generate a default route for these area types, use the area
stub or area nssa commands.
E XAMPLE
This example assigns a metric of 20 to the default external route
advertised into an autonomous system, sending it as a Type 2 external
metric.
Console(config-router)#default-information originate metric 20 metric-type 2
Console(config-router)#
R ELATED C OMMANDS
ip route (1448)
redistribute (1524)