From: Khalid Siddiq (khalid@xxxxxxxxxx)
Date: Wed Aug 28 2002 - 11:02:46 GMT-3
Chech the next-hop ip address 192.68.6.1 on R10 router, it should be in routing
table.
khalid
-----Original Message-----
From: Colin Barber [mailto:Colin.Barber@telewest.co.uk]
Sent: Wednesday, August 28, 2002 3:14 PM
To: 'Graham, John'; 'ccielab@groupstudy.com'
Subject: RE: Page 376 of Internet Routing by Halabi
MED is being sent from R5 in AS3 to two routers (R7 and R10) in AS1.
Therefore the two routes being compared on R7 and R10 have MED values from a
single AS.
Colin
-----Original Message-----
From: Graham, John [mailto:john.graham@cgey.com]
Sent: 28 August 2002 10:54
To: 'Colin Barber'; 'Robert Miller'; 'ccielab@groupstudy.com'
Subject: RE: Page 376 of Internet Routing by Halabi
Isn't he trying to prefer one route to a destination over another on a local
basis ?
-----Original Message-----
From: Colin Barber [mailto:Colin.Barber@telewest.co.uk]
Sent: 27 August 2002 14:32
To: 'Robert Miller'; 'ccielab@groupstudy.com'
Subject: RE: Page 376 of Internet Routing by Halabi
You shouldn't need 'always-compare-med' as the route is being advertised by
only one AS (AS3)
Colin
-----Original Message-----
From: Robert Miller [mailto:rmiller@absitech.com]
Sent: 27 August 2002 14:17
To: ccielab@groupstudy.com
Subject: RE: Page 376 of Internet Routing by Halabi
Refer to the rules for comparing Med for external
vs. internal AS's
"always-compare-med"
Robert
------------------------------------------------
On Tue, 27 Aug 2002 05:22:36 -0700 (PDT), Angelo De Guzman
<ghie_pogi@yahoo.com> wrote:
> Hi to All,
>
>
> R10 ------R7
> | /
> | /
> | /
> R5
>
> R10 and R7 in AS 1.
> R5 in AS 3
>
> My objective is for R10 to prefer the path to R7
> going into AS 5. I'm only allowed to change the metric
> to make this work. The link between R5 and R10 will
> only be used when R5 to R7 link fails.
>
> Here's my Config.
>
> R5
>
> router BGP 3
> network 172.16.220.0 mask 255.255.255.0
> neighbor 172.16.20.1 remote-as 1
> neighbor 172.16.20.1 route-map setmetric out
> neighbor 192.68.6.2 remote-as 1
> neighbor 192.68.6.2 route-map setmetric1 out
> no auto-summary
>
> route-map setmetric permit 10
> set metric 100
>
> route-map setmetric1 permit 10
> set metric 50
>
> These are the sh ip bgp for R7 and R10
>
> R10#sh ip bgp
> BGP table version is 3, local router ID is 192.68.11.1
> Status codes: s suppressed, d damped, h history, *
> valid, > best, i - internal
> Origin codes: i - IGP, e - EGP, ? - incomplete
>
> Network Next Hop Metric LocPrf Weight
> Path
> *> 172.16.220.0/24 172.16.20.2 100 0 3 i
> * i 192.68.6.1 50 100 0 3 i
> *> 192.68.11.0 0.0.0.0 0 32768 i
>
>
> R7#sh ip bgp
> BGP table version is 7, local router ID is 192.68.9.2
> Status codes: s suppressed, d damped, h history, *
> valid, > best, i - internal
> Origin codes: i - IGP, e - EGP, ? - incomplete
>
> Network Next Hop Metric LocPrf
> Weight Path
> * i172.16.220.0/24 172.16.20.2 100 100 0 3
> i
> *> 192.68.9.1 50 0 3
> i
> *>i192.68.11.0 192.68.6.2 0 100 0 i
>
> Why does R10 still prefers the link between R10 and
> R5. Eventhough the network 172.16.220.0/24 has a
> metric of 100.
> Thanks,
> Angelo
>
>
This archive was generated by hypermail 2.1.4 : Sat Sep 07 2002 - 19:48:40 GMT-3