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THE
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3-310
Redistributing External Routes
You can configure this router to import external routing information from
other routing protocols into the autonomous system.
Command Usage
• This router supports redistribution for both RIP and static routes.
• When you redistribute external routes into an OSPF autonomous
system (AS), the router automatically becomes an autonomous system
boundary router (ASBR).
• However, if the router has been manually configured as an ASBR via
the General Configuration screen, but redistribution is not enabled, the
router will only generate a “default” external route into the AS if it has
been configured to “always” advertise a default route even if an
external route does not actually exist (page 3-287).
• Metric type specifies the way to advertise routes to destinations outside
the autonomous system (AS) via External LSAs. Specify Type 1 to add
the internal cost metric to the external route metric. In other words, the
cost of the route from any router within the AS is equal to the cost
associated with reaching the advertising ASBR, plus the cost of the
external route. Specify Type 2 to only advertise external route metric.
• The metric value specified for redistributed routes supersedes the
Default External Metric specified in the OSPF / General
Configuration screen (page 3-287).
Command Attributes
• Redistribute Protocol – Specifies the external routing protocol type
for which routing information is to be redistributed into the local
routing domain. (Options: RIP, Static; Default: RIP)
OSPF
AS
RIP, or
static routes
Router
ASBR