Max Prefix Out, was Re: Verizon 701 Route leak?

Leo Bicknell bicknell at
Thu Aug 31 15:24:30 UTC 2017

In a message written on Thu, Aug 31, 2017 at 12:50:58PM +0200, J??rg Kost wrote:
> What about adding an option to the BGP session that A & B do agree on a 
> fixed number of prefixes in both directions, so Bs prefix-in could be As 
> prefix-out automatically?

As others have pointed out, that's harder to do, but there's a
different reason it may not be desireable.

If a peer sets a limit to tear down the session with no automatic
reset, forcing a call to their NOC to get a human to reset it then
it may be advantageous to set your side to tear down at N-1 prefixes.
That way you can insure restoration at the speed of your NOC, and
not at the speed of your peer's.

Leo Bicknell - bicknell at
PGP keys at
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