Configuring the ECN330-switch
458 1553-KDU 137 365 Uen D 2006-06-16
CLI - This example configures the backbone area and one transit area.
6.20.10.7 Configuring Summary Addresses (for External AS Routes)
An Autonomous System Boundary Router (ASBR) can redistribute routes
learned from other protocols into all attached autonomous systems. (See
6.20.10.8 "Redistributing External Routes" 460) To reduce the amount of
external LSAs imported into the local routing domain, configure the router to
advertise an aggregate route that consolidates a broad range of external
addresses.
Command Usage
• If it is not clear which address ranges can be consolidated, first enable
external route redistribution through the Redistribute Configuration
screen, view the routes imported into the routing table, and then
configure one or more summary addresses to reduce the size of the
routing table and consolidate these external routes for advertising into
the local domain.
• To summarize routes sent between OSPF areas, use the Area Range
Configuration screen (page 446).
Console(config-router)#network 10.0.0.0 255.0.0.0 area 0.0.0.0
Console(config-router)#network 10.1.1.0 255.255.255.0 area 0.0.0.1
Console(config-router)#end
Console#show ip ospf
Routing Process with ID 10.1.1.253
Supports only single TOS(TOS0) route
Number of area in this router is 4
Area 0.0.0.0 (BACKBONE)
Number of interfaces in this area is 1
SPF algorithm executed 8 times
Area 0.0.0.1
Number of interfaces in this area is 1
SPF algorithm executed 5 times
Area 0.0.0.2 (STUB)
Number of interfaces in this area is 1
SPF algorithm executed 13 times
Area 0.0.0.3 (NSSA)
Number of interfaces in this area is 1
SPF algorithm executed 12 times
Console#
To Next Page
Loading...
