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