North American Network Operators Group
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Re: Policies: Routing a subset of another ISP's address block
- From: Randy Bush
- Date: Wed Apr 05 19:31:18 2000
> You're going to have to exempt multihomed downstream customers from your
> anti spoofing filters anyway, whether they use your space, someone else's
> or their own.
indeed this seems to be the case. which breaks the schemes for ingress
filtering based on forwarding table entries <sigh>.
> To put it another way, if you have clueful downstreams, you should
> delegate anti spoofing to them, they will do it closer to the edge where
> there is no asymetrical routing.
one of the rare bits of positive feedback here. multi-homed customers do
tend to be a bit more clued. so, in this too rare instance, the pain is
near some clue to fix it.
randy
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