RE: Regarding IPv6 prefix filtering
Gert,
Gert Doering wrote: Currently there is no other working and implemented way to get v6 multihoming. Multiple /48s obviously do not work (think failover of established TCP sessions and routing policy decisions), regional addressing isn't here (and I'm unsure how that is supposed to work concerning non-rationality of upstream networks), so what else do we have?
There is no current v6 multihoming solution, and we know it. It will not be ready for months at best and we also know that. I repeatedly voiced loudly my dissatisfaction about the lack of progress towards a v6 multihoming solutions. We are actively working on it. Nevertheless, no matter how good the reasons, even tacitly allowing /48s in the routing table does create a terrible precedent. Michel.
Hi, On Thu, May 02, 2002 at 10:16:26AM -0700, Michel Py wrote:
Nevertheless, no matter how good the reasons, even tacitly allowing /48s in the routing table does create a terrible precedent.
Maybe. But I'm not so sure whether this is so terrible - if you do not want to see /48s, filter them out, and live with potentially non-perfect routing (to the aggregate and find the more-specific there). Later on this can be combined with "announce to the next two AS hops only" advertising techiques (as soon as they become available). This is faaaar better than giving those entities that really need multihoming today their own address space, which definitely will be unfilterable and in the routing table for ever - like the RIPE NCC (ip6.arpa reverse DNS over v6 transport), the DENIC (.DE ccTLD), and so on. Those entities want IPv6 space *now*, and I think we all agree that they are no more special than everybody else and should not have an allocation of their own (or "PI"). ARIN, btw, is just working on "IPv6 microallocations", which I consider worse than "announce a /48 from an aggregate". Gert Doering -- NetMaster -- Total number of prefixes smaller than registry allocations: 47584 (44543) SpaceNet AG Mail: netmaster@Space.Net Joseph-Dollinger-Bogen 14 Tel : +49-89-32356-0 80807 Muenchen Fax : +49-89-32356-299
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Gert Doering -
Michel Py