North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Multiple BGP Routes in FIB
Hi Glenn, Glen Kent wrote: I believe the problem is with the BGP withdrawal mechanism. When BGP withdraws a route it only specifies the prefix being withdrawn and not the path. In this case, if the peer advertised both paths {x y z} and {m n z} for a single prefix it would be impossible to withdraw only one of the paths. I guess, even when using ECMP, BGP still really only considers there to be one best route. Everything else is local FIB manipulations based on local policy (in a similar vein to policy routing - the BGP advertisements don't always reflect which way the traffic will actually be routed).Hi, There is an interesting discussion going on in the IDR WG and i am cross posting a mail on Nanog to hear from the operators, if what is described below, a common practise followed by them:>> I don't think its correct to advertise one while using both for Sam
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