From: Leigh Harrison (ccileigh@gmail.com)
Date: Wed Oct 26 2005 - 09:51:27 GMT-3
Chaps,
I've figured out why it's doing it:-
I've got a virtual link in there to a router behind R1, i.e:-
R4 -- area 2 -- R1 -- area 1 -- R2 -- area 0 -- R3
------virt------
in the ospf database - R3 is seeing the routes advertised via R1 from
Area 0.
Any thoughts on how to stop it sending them in to area 0 ?
LH
kevin gannon wrote:
>I tested what I think your topology is and I only get the summary
>on R3.
>
>R5#sh ip os int | i Are|is up
>Serial0/1 is up, line protocol is up
> Internet Address 35.35.35.5/24, Area 0
>Serial0/0 is up, line protocol is up
> Internet Address 25.25.25.5/24, Area 1
>R5#
>R5#sh ip rou osp
> 2.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
>O 2.2.2.2/32 [110/65] via 25.25.25.2, 00:03:04, Serial0/0
>O 2.0.0.0/8 is a summary, 00:03:04, Null0
> 33.0.0.0/32 is subnetted, 1 subnets
>O 33.33.33.33 [110/65] via 35.35.35.3, 00:03:04, Serial0/1
>R5#
>R5#sh run | i area 1
> area 1 range 2.0.0.0 255.0.0.0
> network 25.25.25.0 0.0.0.255 area 1
>R5#
>
>The route in question is 2.2.2.2/32 and is seen from Area 0
>via Serial 0/0. Then on another router in Area 0 this is what
>I see:
>
>R3#sh ip os int | i Area|is up
>Loopback33 is up, line protocol is up
> Internet Address 33.33.33.33/32, Area 0
>Serial0/1 is up, line protocol is up
> Internet Address 35.35.35.3/24, Area 0
>R3#
>R3#sh ip rou os
>R3#sh ip rou ospf
>O IA 2.0.0.0/8 [110/129] via 35.35.35.5, 00:04:58, Serial0/1
> 25.0.0.0/24 is subnetted, 1 subnets
>O IA 25.25.25.0 [110/128] via 35.35.35.5, 00:05:53, Serial0/1
>R3#
>
>I only see the summary on other routers in Area 0. Maybe you
>can post the configs.
>
>
>Regards
>Kevin
>
>On 10/26/05, Lee Donald <Lee.Donald@t-systems.co.uk> wrote:
>
>
>>Hi Leigh,
>>
>>R3 would get this summary and the /24 as it is part of area 0. The injected
>>network and the summary would go into area 0 as all lsa's do. Another area
>>would receive only the summary.
>>For example your topology
>>
>>R1 -- area 1 -- R2 -- area 0 -- R3 -- area 4 -- R4
>>
>>Router 3 will see both routes but R4 will only see the summary.
>>
>>Regards
>>
>>Lee.
>>
>>
>>
>>-----Original Message-----
>>From: Leigh Harrison [mailto:ccileigh@gmail.com]
>>Sent: Wednesday, October 26, 2005 1:08 PM
>>To: FORUM
>>Subject: OSPF area range
>>
>>Anyone,
>>
>>I've put in a area range on a router.
>>
>>It sends it out to the correct boxes attached to it, BUT!! It also send
>>out the routes that I'm trying to summerise !!!
>>
>>I can't seem to see why. Any thoughts ?
>>
>>R1 -- area 1 -- R2 -- area 0 -- R3
>>
>>R1 has the addresses 12.12.8.0 - 9.0 - 10.0 - 11.0
>>On R2 I put the command:-
>>area 1 range 12.12.8.0 255.255.252.0
>>
>>In the routing table of R3 I get:-
>>
>>O IA 12.12.8.0/24 [110/139] via 12.12.23.3, 00:34:18, Serial0
>>O IA 12.12.8.0/22 [110/65] via 12.12.23.3, 00:34:23, Serial0
>>O IA 12.12.9.0/24 [110/87] via 12.12.23.3, 00:34:23, Serial0
>>O IA 12.12.10.0/24 [110/85] via 12.12.23.3, 00:34:23, Serial0
>>O IA 12.12.11.0/24 [110/86] via 12.12.23.3, 00:34:23, Serial0
>>O IA 12.12.13.0/24 [110/129] via 12.12.23.3, 00:36:30, Serial0
>>
>>It sends out the summary, as per, but also sends out the routes too.
>>
>>I wanted to cut down the table, not add to it !!!!
>>
>>Time for a cup of tea methinks....
>>
>>LH
>>
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