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

Randy Bush randy at
Sat Sep 2 03:40:33 UTC 2017

>>> i have 142 largish bgp customers, a large enough number that the number
>>> of prefixes i receive from them varies annoyingly.  how do i reasonably
>>> automate setting of my outbound prefix limit?
>> First, it seems you know the inbound so automating the outbound is simple
>> arithmetic.
> I would have said the same... i ought to know high-water marks for your
> inbound peer count(s), and can work out a +20% outbound...

you just assumed that the transitive closure of everybody's cones
implement and propagate count.  ain't gonna happen.

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