Chapter 14 OSPF Configuration
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1. To configure area route aggregation, use area <area-id>
range <ip-address> <net-mask> [advertise|not-
advertise] command in OSPF route mode as shown in
Table
245.
TABLE 245 INTER AREA ROUTE AGGREGATION COMMAND
Command Format
Command
Mode
Command
Function
area <area-id> range
<ip-address> <net-
mask> [advertise|not-
advertise]
Route
This configures the
range of summary
address in an area
Result: This sets range of summary address in an area.
Configuring Route Aggregation upon
Route Redistribution
After routes of other routing protocols are redistributed into the
OSPF, each independent route is advertised as an external LSA.
By means of aggregation, these external routes can be
advertised as an independent route, which will greatly reduce
the size of the link state database of the OSPF.
This below procedure describes how to configure inter area route
aggregation in OSPF.
îš„ Router Command Line Interface has been accessed.
îš„ OSPF is running on a network as described in above basic
OSPF configuration.
1. To configure route aggregation for route redistribution, use
summary-address <ip-address> <net-mask> command in
OSPF route mode as shown in
Table 246.
TABLE 246 SUMMARY ADDRESS COMMAND
Command
Format
Command
Mode
Command Function
summary-
address <ip-
address> <net-
mask>
OSPF Route
This sets up summary
address for OSPF and
summarizes other routing
protocol paths being
redistributed to the OSPF
Result: This defines summary address for OSPF and
summarizes other routing protocol paths being redistributed
to the OSPF.
Steps
Introduction
Purpose
Prerequisite
Steps
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