Re: Addr: Re: BGP-4 - revised I-D

[Curtis Villamizar <[e-mail]>]

In message <[e-mail]>om>, Tony Li writes:
> 
> If I understand what Curtis is getting at (50% chance, max), there is some
> ambiguity (or at least possibility of misinterpretation) in the MED
> comparison step.  One interpretation is:

Yep.

> - group the routes by neighboring AS
> - within each group, select the routes with the best MED
> 
> which is also what I think is the intended interpretation.  Alternate
> interpretations include:
> 
> i)
> - group the routes by neighboring AS
> - within each group, select _a_ route with the best MED


Interpretation i) is the same as the first.  If there are two routes
with the same AS and the same MED, the next criteria is IGP cost or
advertising router IP address.  Whether you bring one or both into the
next comparison, you end up with the same decision whether you
consider MED and they tie in the first comparison or you ignore MED in
the second comparison.

Did I miss something.  i) is the algorithm I suggested for the draft
based on my understanding of what Rich Woundy has suggesting.

Curtis