North American Network Operators Group|
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Re: Why doesn't BGP...
> * 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 - - - - - - - - - - - - - - - - -