From: kevin gannon (kevin@gannons.net)
Date: Wed Oct 26 2005 - 09:27:53 GMT-3
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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