From: Edison Ortiz (edisonmortiz@gmail.com)
Date: Fri Feb 23 2007 - 12:09:08 ART
Try
summary-address 172.9.4.0 255.255.252.0
You are supposed to aggregate a route into one, not subnet it.
----- Original Message -----
From: "Kim" <support@isolvesystems.com>
To: "Eric Leung" <eric.lwc@gmail.com>
Cc: "Cisco certification" <ccielab@groupstudy.com>
Sent: Friday, February 23, 2007 9:08 AM
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:
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>
> _______________________________________________________________________
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