By summarizing to 206.202.0.0 255.255.252.0 (aka inverse mask 0.0.3.255),
you are including the following networks:
206.202.0.x / 24
206.202.1.x / 24
206.202.3.x / 24
206.202.4.x / 24
into 1 supernetted network.
LAB
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
FREDL L AZARES
Sent: Monday, February 05, 2001 6:02 PM
To: [EMAIL PROTECTED]
Subject: OSPF External Summarization
RouterA---------OSPF Area 0-----------RouterB---------------OSPF Area
0-------------RouterC
206.202.0.1/24 206.202.0.2/24 206.202.1.1/24
206.202.1.2/24
Scenario: You have RIP routing domain and an OSPF Area 0 with
redistribution. To reduce the number of RIP routes, you have to configure
a summary-address in OSPF to only advertise one route to RIP networks.
Configuration for RouterA:
Router-A(config)#router ospf 1
Router-A(config-router)#network 206.202.0.0 0.0.3.255 area 0
I don't understand how they came up with wildcard mask 0.0.3.255. Can
someone elaborate on this.
Thanks in advance.
Fred
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