From: Rich Collins (nilsi2002@gmail.com)
Date: Mon Oct 22 2007 - 14:29:39 ART
What does "sh ip route rip" of rip database show before you add the offset
lists?
On 10/21/07, Jo Knight <joknight@gmail.com> wrote:
>
> Hi GS,
>
> I am working through this task, and am having trouble with the task to
> get SW2 to use the optimal routing paths. Can someone who knows this lab
> please offer some assistance.
>
>
> SW2
>
> R 204.12.1.0/24 [120/2] via 163.1.18.1, 00:00:01, FastEthernet0/21
> R 163.1.35.0/24 [120/2] via 163.1.18.1, 00:00:01, FastEthernet0/21
> R 163.1.45.0/24 [120/2] via 163.1.18.1, 00:00:01, FastEthernet0/21
> R 163.1.54.0/24 [120/2] via 163.1.18.1, 00:00:01, FastEthernet0/21
> R 163.1.57.0/24 [120/2] via 163.1.18.1, 00:00:01, FastEthernet0/21
> R 163.1.6.0/24 [120/2] via 163.1.18.1, 00:00:02, FastEthernet0/21
> R 163.1.4.0/24 [120/2] via 163.1.18.1, 00:00:02, FastEthernet0/21
> R 163.1.5.0/24 [120/2] via 163.1.18.1, 00:00:02, FastEthernet0/21
> R 163.1.13.3/32 [120/2] via 163.1.18.1, 00:00:02, FastEthernet0/21
> R 163.1.15.0/24 [120/2] via 163.1.18.1, 00:00:02, FastEthernet0/21
> R 163.1.12.0/24 [120/2] via 163.1.18.1, 00:00:02, FastEthernet0/21
> R 163.1.13.0/24 [120/2] via 163.1.18.1, 00:00:02, FastEthernet0/21
> R 192.10.1.0/24 [120/2] via 163.1.18.1, 00:00:03, FastEthernet0/21
> R 150.1.6.0/24 [120/2] via 163.1.18.1, 00:00:03, FastEthernet0/21
> R 150.1.4.0/23 [120/2] via 163.1.18.1, 00:00:03, FastEthernet0/21
> R 150.1.3.0/24 [120/2] via 163.1.18.1, 00:00:03, FastEthernet0/21
> R 150.1.2.0/24 [120/2] via 163.1.18.1, 00:00:03, FastEthernet0/21
> R 150.1.1.0/24 [120/2] via 163.1.18.1, 00:00:03, FastEthernet0/21
>
> offset-list 1 in 2 FastEthernet0/20
> offset-list 0 in 1 FastEthernet0/21
>
> access-list 1 permit 150.1.6.0
> access-list 1 permit 150.1.2.0
> access-list 1 permit 150.1.1.0
> access-list 1 permit 163.1.6.0
> access-list 1 permit 163.1.12.0
> access-list 1 permit 204.12.1.0
>
> I have the offset lists configured on SW2 that matches networks behind
> R1. My understanding of this is that all routes that match access-list 1
> will be offset by 2 for these routes recieved on interface F0/20 (which
> is connected to R3), which in turn will prefer them to be sent via F0/21
> through R1. All other routes will be offset by 1 so should be preferred
> via F0/20 and be sent to R3.
>
> My problem seems to be that by default all routes are preferred from R1
> (via F0/21) so whatever I do it never prefers the routes via R3 (F0/20).
>
> Thanks,
> Jo
>
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