[6076] in North American Network Operators' Group
Re: Why doesn't BGP...
daemon@ATHENA.MIT.EDU (Peter Lothberg)
Mon Nov 11 06:21:43 1996
Date: Mon, 11 Nov 96 12:02:43 MET
From: Peter Lothberg <roll@Stupi.SE>
To: Marten Terpstra <marten@BayNetworks.com>
Cc: Ed Morin <edm@halcyon.com>, nanog@merit.edu
In-Reply-To: Your message of Fri, 08 Nov 1996 22:23:17 -0500
> * Why doesn't BGP pick the link with the highest bandwidth, or, better
> * yet, pick the link with the highest bandwidth AND least congestion to
> * label as the "best" available route? The needed information is avail-
>
> The first one is easy, in fact you can do that yourself by fiddling
> with metrics or such on the different BGP sessions. The second one
> would have dramatic consequences in terms of route instability. You
> pick one route now because of load on the link, the load changes and
> you pick the other, now BGP will have to change the announcement of
> this network to other peers. So, now we not only have flaps because of
> links/routers going up and down, we also have flap because of load
> changes on the network. The result: you are dampened out forever, or
> the network falls over.
>
> -Marten
On the radio1::
"101 north is congested, take 280 instead"
Guess what hapens 5 minutes laster;
On the radio2::
"280 north is congested, take 101 instead"
goto on the radio1
--Peter
