nanog mailing list archives
Re: metric 0 vs 'no metric at all'
From: "Stephen J. Wilcox" <steve () telecomplete co uk>
Date: Tue, 3 Jan 2006 15:27:43 +0000 (GMT)
On Tue, 3 Jan 2006, Alexander Koch wrote:
I was wondering if someone had done any or some research on this before... basically I am not sure with all the many implementations of BGP and all the vendors if and what those will do when they see a metric of 0 and no metric. I am not an expert knowing the actual protocol's messages exchanged, but I see some routes with nothing in the metric field on the various show commands, and some have explicit '0' metric. I do not trust all the BGP implementations around, and we consider changing the default outbound, with MEDs of course still available on request.
i had this some time ago, cant remember where but i found some answers... basically no metric is undefined, and can be handled either as all-zero or all-ones or anything you want really the best practice was to set med manually to ensure the expected behaviour occurred. Steve
Current thread:
- metric 0 vs 'no metric at all' Alexander Koch (Jan 02)
- Re: metric 0 vs 'no metric at all' Daniel Roesen (Jan 03)
- Re: metric 0 vs 'no metric at all' Danny McPherson (Jan 03)
- Re: metric 0 vs 'no metric at all' Pierfrancesco Caci (Jan 03)
- Re: metric 0 vs 'no metric at all' Stephen J. Wilcox (Jan 03)
- Re: metric 0 vs 'no metric at all' Daniel Roesen (Jan 03)