Some doubts on large scale BGP/AS design and black hole routing risk

Mark Tinka mark.tinka at
Mon Apr 4 13:07:57 UTC 2016

On 4/Apr/16 14:58, Christopher Morrow wrote:

> ​so (as bill points out) plan to localize subnets to each pop. (do not
> number customers in pop1 in the same /24 as customers in pop2)​


May lead to some global de-aggregation, but can't really avoid that.

> ​be aware of gre / ip-in-ip forwarding limitations​

I wouldn't touch it, myself.

I'd rather devote the sleepless nights to fixing the backhaul.

> ​different providers, different entrance facilities in the
> building(s), different conduits out of the area... and hope that
> somewhere along the path providerA and B didn't share conduit or
> capacity-swap you to a single path :)​



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