From: Thomas Larus (tlarus@xxxxxxx)
Date: Thu Dec 13 2001 - 21:08:51 GMT-3
Let me take a stab at this. The reason that the area range command is
used at the area border router is that it is summarizing the addresses
from one area to another area. Therefore, it will have no effect on the
advertisements within the same area as the routes being summarized.
In short, the area range function is working exactly the way it is
supposed to.
Thomas Larus
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Emenike Agbim
Sent: Thursday, December 13, 2001 4:54 PM
To: ccielab@groupstudy.com
Subject: RE: Ospf area range Command
When I configure Ospf area range command, the specific addresses which I
have summarized are sent to the neighbor router within the same area?
This
behavior is revealed both when "....advertised" and ".....not
advertised" is
used with the "area range ...." command. Why? See config below
Router A
interface Loopback20
ip address 10.0.0.1 255.255.0.0
no ip directed-broadcast
!
interface Loopback21
ip address 10.1.0.1 255.255.0.0
no ip directed-broadcast
!
interface Loopback22
ip address 10.2.0.1 255.255.0.0
no ip directed-broadcast
!
interface Loopback23
ip address 10.3.0.1 255.255.0.0
no ip directed-broadcast
!
interface Loopback24
ip address 10.4.0.1 255.255.0.0
no ip directed-broadcast
!
interface Loopback25
ip address 10.5.0.1 255.255.0.0
no ip directed-broadcast
!
interface Loopback26
ip address 10.6.0.1 255.255.0.0
no ip directed-broadcast
!
interface Loopback27
ip address 10.7.0.1 255.255.0.0
no ip directed-broadcast
area 192.168.10.0 range 10.0.0.0 255.248.0.0 not-advertise
Router B show ip route
O 10.3.0.1 [110/2] via 192.168.10.1, 00:03:04, FastEthernet0/0
O 10.2.0.1 [110/2] via 192.168.10.1, 00:03:06, FastEthernet0/0
O 10.1.0.1 [110/2] via 192.168.10.1, 00:03:06, FastEthernet0/0
O 10.0.0.1 [110/2] via 192.168.10.1, 00:03:06, FastEthernet0/0
O 10.7.0.1 [110/2] via 192.168.10.1, 00:03:06, FastEthernet0/0
O 10.6.0.1 [110/2] via 192.168.10.1, 00:03:06, FastEthernet0/0
O 10.5.0.1 [110/2] via 192.168.10.1, 00:03:06, FastEthernet0/0
O 10.4.0.1 [110/2] via 192.168.10.1, 00:03:06, FastEthernet0/0
Thanks for your response
Emenike Agbim, PE, CCNP
Network Engineer
Adelphia Business Solution
(814) 260 3123
emenike.agbim@adelphia.com <mailto:emenike.agbim@adelphia.com>
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