From: Brian (briane@surewest.net)
Date: Wed May 10 2006 - 07:49:59 ART
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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