From: Sidalo (sidalo@gmail.com)
Date: Tue May 09 2006 - 20:21:25 ART
Analyze the next hop addresses, and see if that shows you anything.
Also post the relevant configs so we can see them and verify some
information.
On 5/10/06, Brian <briane@surewest.net> wrote:
>
> I am working on task IEWB Lab 1 Task 4.3 and have a question. There is
> a prefix that is originated in AS 200. There are 2 EBGP peering
> sessions with AS 100. The goal is to have traffic from AS 100 destined
> to AS 200 to prefer a specific path (i.e. where we are advertising the
> lower MED). I am questioning what I should see when I issue sh ip bgp.
>
>
> In the table for R3 I see both paths and both MED values. However in
> all other routers in AS 100 I only see 1 path with the MED???
>
>
> SW2 (AS200) ---> R5 (AS100) -- Med Set to 100 for specific prefix
> (150.1.11.0)
> R2 (AS200) ---> R3 (AS100) - Med Set to 200 for specific prefix
> (150.1.11.0)
>
> The output is similar to R5 in other routers in AS100. Any help would
> be greatly appreciated.
>
> R3#sh ip bgp
> BGP table version is 33, local router ID is 150.1.3.3
> Status codes: s suppressed, d damped, h history, * valid, > best, i -
> internal,
> r RIB-failure, S Stale
> Origin codes: i - IGP, e - EGP, ? - incomplete
>
> Network Next Hop Metric LocPrf Weight Path
> *>i28.119.16.0/24 54.1.1.254 0 200 0 54 i
> * 204.12.1.254 0 0 54 i
> * 204.12.1.254 0 0 54 i
> * 204.12.1.254 0 0 54 i
> * i112.0.0.0 54.1.1.254 0 100 0 54 50 60 i
> *> 204.12.1.254 0 54 50 60 i
> * i113.0.0.0 54.1.1.254 0 100 0 54 50 60 i
> *> 204.12.1.254 0 54 50 60 i
> *>i114.0.0.0 54.1.1.254 0 200 0 54 i
> * 204.12.1.254 0 54 i
> *>i115.0.0.0 54.1.1.254 0 200 0 54 i
> * 204.12.1.254 0 54 i
> *>i116.0.0.0 54.1.1.254 0 200 0 54 i
> * 204.12.1.254 0 54 i
> *>i117.0.0.0 54.1.1.254 0 200 0 54 i
> * 204.12.1.254 0 54 i
> *>i118.0.0.0 54.1.1.254 0 200 0 54 i
> Network Next Hop Metric LocPrf Weight Path
> * 204.12.1.254 0 54 i
> *>i119.0.0.0 54.1.1.254 0 200 0 54 i
> * 204.12.1.254 0 54 i
> *>i150.1.11.0/24 183.1.0.5 100 100 0 200 i
> * 183.1.123.1 200 0 200 i
> *> 205.90.31.0 183.1.123.1 0 200 254 ?
> *> 220.20.3.0 183.1.123.1 0 200 254 ?
> *> 222.22.2.0 183.1.123.1 0 200 254 ?
>
>
>
>
> R5#sh ip bgp
> BGP table version is 16, local router ID is 150.1.5.5
> Status codes: s suppressed, d damped, h history, * valid, > best, i -
> internal,
> r RIB-failure, S Stale
> Origin codes: i - IGP, e - EGP, ? - incomplete
>
> Network Next Hop Metric LocPrf Weight Path
> *>i28.119.16.0/24 54.1.1.254 0 200 0 54 i
> *>i28.119.17.0/24 54.1.1.254 0 200 0 54 i
> * i112.0.0.0 204.12.1.254 0 100 0 54 50 60 i
> *>i 54.1.1.254 0 100 0 54 50 60 i
> * i113.0.0.0 204.12.1.254 0 100 0 54 50 60 i
> *>i 54.1.1.254 0 100 0 54 50 60 i
> *>i114.0.0.0 54.1.1.254 0 200 0 54 i
> *>i115.0.0.0 54.1.1.254 0 200 0 54 i
> *>i116.0.0.0 54.1.1.254 0 200 0 54 i
> *>i117.0.0.0 54.1.1.254 0 200 0 54 i
> *>i118.0.0.0 54.1.1.254 0 200 0 54 i
> *>i119.0.0.0 54.1.1.254 0 200 0 54 i
> *> 150.1.11.0/24 183.1.58.8 100 0 200 i
> * 205.90.31.0 183.1.58.8 100 0 200 254 ?
> *>i 183.1.123.1 0 100 0 200 254 ?
> * 220.20.3.0 183.1.58.8 100 0 200 254 ?
> *>i 183.1.123.1 0 100 0 200 254 ?
>
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