Re: [c-nsp] Late night BGP puzzler

2007-08-02 Thread Gert Doering
Hi, On Thu, Aug 02, 2007 at 12:00:50PM +1000, Gunjan GANDHI (BR/EPA) wrote: MED should not be used under this scenario as both the upstream routes are from different providers. Unless both providers have agreed upon a MED benchmark value, it is not wise to use MED for route selection. It is

Re: [c-nsp] Late night BGP puzzler

2007-08-02 Thread Peter Kranz
PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gert Doering Sent: Wednesday, August 01, 2007 11:26 PM To: Gunjan GANDHI (BR/EPA) Cc: Collins, Richard (EXT); cisco-nsp@puck.nether.net Subject: Re: [c-nsp] Late night BGP puzzler Hi, On Thu, Aug 02, 2007 at 12:00:50PM +1000, Gunjan GANDHI (BR/EPA

Re: [c-nsp] Late night BGP puzzler

2007-08-02 Thread Euan Galloway
On Thu, Aug 02, 2007 at 08:38:36AM -0700, Peter Kranz wrote: Unfortunately, MED comes too late in the process for this example (equal as path length routes from 2 different AS#, one IGP and one EGP). The Origin (step 5) of both was IGP. 2914 701 668 128.241.219.33 from 128.241.219.33

Re: [c-nsp] Late night BGP puzzler

2007-08-02 Thread Stephen Wilcox
On Thu, Aug 02, 2007 at 05:25:07PM +0100, Euan Galloway wrote: The difference was at step 7 Prefer eBGP over iBGP paths. Which thankfully comes before step 6 Prefer the path with the lowest multi-exit discriminator (MED). (huge list of med related caveats apply). Unless we changed

Re: [c-nsp] Late night BGP puzzler

2007-08-01 Thread Gert Doering
Hi, On Wed, Aug 01, 2007 at 04:43:20PM +1000, Gunjan GANDHI (BR/EPA) wrote: Because ebgp routes are preferred over ibgp routes. Thats is a tie breaker if the MED is equal. Which it isn't. So indeed this is puzzling. gert -- USENET is *not* the non-clickable part of WWW!

Re: [c-nsp] Late night BGP puzzler

2007-08-01 Thread Gunjan GANDHI (BR/EPA)
Because ebgp routes are preferred over ibgp routes. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Peter Kranz Sent: Wednesday, 1 August 2007 4:33 PM To: cisco-nsp@puck.nether.net Subject: [c-nsp] Late night BGP puzzler I can't for the life of me

Re: [c-nsp] Late night BGP puzzler

2007-08-01 Thread Elmar K. Bins
[EMAIL PROTECTED] (Gert Doering) wrote: Hi, On Wed, Aug 01, 2007 at 04:43:20PM +1000, Gunjan GANDHI (BR/EPA) wrote: Because ebgp routes are preferred over ibgp routes. Thats is a tie breaker if the MED is equal. Which it isn't. So indeed this is puzzling. I'd say his router wants

Re: [c-nsp] Late night BGP puzzler [NC]

2007-08-01 Thread david . ponsdesserre
-- [EMAIL PROTECTED] Sent by: [EMAIL PROTECTED] 01/08/07 08:07 To [EMAIL PROTECTED], cisco-nsp@puck.nether.net cc Subject Re: [c-nsp] Late night BGP puzzler [EMAIL PROTECTED] (Gert Doering) wrote: Hi, On Wed, Aug 01, 2007 at 04:43:20PM

Re: [c-nsp] Late night BGP puzzler

2007-08-01 Thread Stephen Wilcox
On Wed, Aug 01, 2007 at 08:54:16AM +0200, Gert Doering wrote: Hi, On Wed, Aug 01, 2007 at 04:43:20PM +1000, Gunjan GANDHI (BR/EPA) wrote: Because ebgp routes are preferred over ibgp routes. Thats is a tie breaker if the MED is equal. Which it isn't. So indeed this is puzzling. Um

Re: [c-nsp] Late night BGP puzzler

2007-08-01 Thread Manu Chao
eBGP prefer to iBGP On 8/1/07, Peter Kranz [EMAIL PROTECTED] wrote: I can't for the life of me figure out why this won't select path #2 as the best path.. can someone unravel what I'm missing.. My goal is to get it to resolve the equal length AS path dispute using the Cost community. Path #1

Re: [c-nsp] Late night BGP puzzler

2007-08-01 Thread Metz, E.T. (Eduard)
in.. /Eduard -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Manu Chao Sent: woensdag 1 augustus 2007 12:38 To: [EMAIL PROTECTED] Cc: cisco-nsp@puck.nether.net Subject: Re: [c-nsp] Late night BGP puzzler eBGP prefer to iBGP On 8/1/07, Peter

Re: [c-nsp] Late night BGP puzzler

2007-08-01 Thread Gunjan GANDHI (BR/EPA)
- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Collins, Richard (EXT) Sent: Thursday, 2 August 2007 11:24 AM To: cisco-nsp@puck.nether.net Subject: Re: [c-nsp] Late night BGP puzzler What about using the command 'bgp always-compare-med' under the bgp router? If I understand