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Re: do bogon filters still help?
On Wed, 11 Jan 2006, Florian Weimer wrote:
You should move 220.127.116.11/24 from SPECIAL to YES (although you shouldn't see source addresses from that prefix, no matter what the folks at bit.nl think). 169.254.0.0/16 should be NO (otherwise it wouldn't be link-local).I think you just explained it yourself why this is "SPECIAL", i.e. routing of it depends on local policies and setup. Anything where it is not clear from RFCs if it should be routable or not and where it depends on local decisions & policy is what I called SPECIAL.Uhm, no. 6to4 anycast only works without hickups when the prefix is NOT treated in any special way. 8-) That's part of its charm. If operators start to install special filters, they break this functionality for no real gain.
I think this is still quite a bit of a special case as opposed to for example 24/8 block which is ultimately used same as regular RIR blocks. Nevertheless I changed routing to "YES" and leave explanation for future. I also did update and listed comment for reserved blocks with explanation that either regularly updated filters should be used or blocks should be left fully routable. -- William Leibzon Elan Networks firstname.lastname@example.org