From: Joseph Brunner (joe@affirmedsystems.com)
Date: Sat Mar 15 2008 - 17:25:01 ARST
Don't stop now, your iq just increased 10 points...
Aren't you glad you didn't go into Microsoft?
LOL
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Matt
Bentley
Sent: Saturday, March 15, 2008 1:21 PM
To: Cisco certification
Subject: Re: Influence OSPF Path Selection
Hi Team:
Finally figured this one out. I think my mistake might be fairly common for
the average person , so I will tell you what the problem was:
I was trying to set influence path selection for the following ip addresses:
20.20.20.20
21.21.21.21
22.22.22.22
23.23.23.23
24.24.24.24
25.25.25.25
Since the router I was trying manipulate path selection from was being
advertised these routes from multiple sources, it showed up in the routing
table as
23.0.0.0/24 is subnetted, 1 subnets
O E2 23.23.23.0 [110/20] via 8.8.8.1, 00:00:20, FastEthernet0/3
[110/20] via 7.7.7.1, 00:00:20, FastEthernet0/2
[110/20] via 6.6.6.1, 00:00:20, FastEthernet0/1
I was matching in my route-map with the following access-list entries
access-list 2 permit 20.20.20.20
access-list 2 permit 21.21.21.21
Once I switched my ACL entries to
access-list 2 permit 20.20.20.0
access-list 2 permit 21.21.21.0
They filtered just fine.
Anyways, just wanted to give something back
On Sat, Mar 15, 2008 at 12:04 PM, Matt Bentley <mattdbentley@gmail.com>
wrote:
> Hi Team:
>
> Odd question for you. I think I am thinking right. What we have (see
> attached picture), is mutual redistribution occurring on three separate
> routers - distance used to prevent route feedback. I am trying to
> accomplish the following:
>
> Get "FIVE" to choose to go to "ONE" to reach 20.20.20.20 and 21.21.21.21
> Get "FIVE" to choose to go to "TWO" to reach 22.22.22.22 and 23.23.23.23
> Get "FIVE" to choose to go to "THREE" to reach 24.24.24.24 and 25.25.25.25
>
> ONE TWO and THREE are all advertising all of the prefixes (20-25) to FIVE
> via OSPF
>
> When I redistributed between RIP and OSPF on ONE, TWO, and THREE, I tagged
> with following:
> ONE tags with 91
> TWO tags with 92
> THREE tags with 93
>
> I have a distribute-list applied to FIVE's OSPF process:
>
> distribute-list route-map TAGS in
>
> route-map TAGS deny 10
> match tag 92 93
> match ip add 2
> !
> route-map TAGS deny 20
> match tag 91 93
> match ip add 3
> !
> route-map TAGS deny 30
> match tag 91 92
> match ip add 4
> !
> access-list 2 permit 20.20.20.20
> access-list 2 permit 21.21.21.21
> !
> access-list 3 permit 22.22.22.22
> access-list 3 permit 23.23.23.23
> !
> access-list 4 permit 24.24.24.24
> access-list 4 permit 25.25.25.25
>
>
>
> Thanks in advance.
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