Thanks Priscilla, as always thanks for your well informed answer. I think I was confused about "race condition". In this case to me it seems that if iBGP continues to show reachability while the IGP session is down it will send traffic even though without IGP there will be no means for this traffic to reach it's destination. Am I correct in saying that ? ""JohnZ"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > "IP connectivity has to be achieved via a protocol different from BGP; > otherwise, the session will be in a race condition. An example of a race > condition follows: neighbors can reach one another via some IGP, the BGP > session gets established, and the BGP updates get exchanged. The IGP > connection goes away for some reason, but still the BGP TCP session is up > because neighbors can still reach each other via BGP. Eventually the session > will go down because the BGP session cannot depend on BGP itself for > neighbor reachability" > > > > Wouldn't the same condition occur if reachability is acheived via a > different protocol. If the route becomes unreachable then BGP conectivity > will still be lost.What's the advantage of making sure that "race condition" > is avoided. > > > > Thanks. > > JZ
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