From: James Jones \(jamesjon\) (jamesjon@cisco.com)
Date: Fri Feb 23 2007 - 12:02:28 ART
Looks like the summary address should have a mask of 255.255.252.0 not
255.255.255.252
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Kim
Sent: Friday, February 23, 2007 8:09 AM
To: Eric Leung
Cc: Cisco certification
Subject: Re: OSPF - Summarize external route
R6 and R9 are in area 0. Summary-address is done on R9 to summarize
external routes. Please see below.
-----------------------------------------------------------
R9
interface Loopback0
ip address 9.9.9.9 255.255.255.0
!
interface Loopback1
ip address 172.9.4.9 255.255.255.0
!
interface Loopback2
ip address 172.9.5.9 255.255.255.0
!
interface Loopback3
ip address 172.9.6.9 255.255.255.0
!
interface Loopback4
ip address 172.9.7.9 255.255.255.0
router ospf 1
router-id 9.9.9.9
log-adjacency-changes
area 0 authentication message-digest
summary-address 172.9.4.0 255.255.255.252 redistribute connected
subnets route-map loopback network 9.9.9.0 0.0.0.255 area 0 network
150.50.69.0 0.0.0.255 area 0
-------------------------------------------------------
sh ip rou on R6
172.9.0.0/16 is variably subnetted, 4 subnets, 2 masks
O E2 172.9.5.0/24 [110/20] via 150.50.69.9, 00:42:52, Multilink1
O E2 172.9.4.0/30 [110/20] via 150.50.69.9, 00:42:52, Multilink1
O E2 172.9.7.0/24 [110/20] via 150.50.69.9, 00:42:52, Multilink1
O E2 172.9.6.0/24 [110/20] via 150.50.69.9, 00:42:52, Multilink1
-------------------------------------------------------
On 2/23/07, Eric Leung <eric.lwc@gmail.com> wrote:
>
> Hi Kim,
>
> Can you post your config? summary-address command should only
> advertise one external route as an aggregate for all more specific
routes.
>
> HTH,
> Eric Leung
>
>
> 2007/2/23, Kim <support@isolvesystems.com>:
> >
> > I issued the "summary-address 172.9.4.0 255.255.255.252" to
> > summarize external route. I got the summary route, but the more
> > specific routes are still advertised from the ASBR. Is it normal?
> >
> > Thank.
> > Kim
> >
> > ____________________________________________________________________
> > ___ Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
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