Normally I agree with Randy (cough) but: On Thu, 2 Dec 1999, Randy Bush wrote:
Apparently for their convenience Verio has decided what parts of the Internet I can get to.
verio does not accept from peers announcements of prefixes in classic b space longer than the allocations of the regional registries.
Simply put, thats dumb. I can't imagine a technical reason for this (CPU and/or memory), so it must be politcal.
we believe our customers and the internet as a whole will be less inconvenienced by our not listening to sub-allocation prefixes than to have major portions of the network down as has happened in the past. some here may remember the 129/8 disaster which took significant portions of the net down for up to two days.
I believe that if I have a customer who is multihomed between me and another provider, his punch-throughs to the non-address-space-providing provider should be heard. It's called 'global routability.'
the routing databases are not great, and many routers can not handle ACLs big enough to allow a large to irr filter large peers. and some large peers do not register routes.
There are ways to get around this (as-path filtering, maximum-paths, etc) that aren't as nazi as one would hope, but will prevent stupidity and provide sanity checking.
so we and others filter at allocation boundaries and have for a long time. we assure you we do not do it without serious consideration or to torture nanog readers.
Heh.
With no notification.
verio's policy has been constant and public.
But unfortunate. Will they announce a customer-announced /24?