"Crooks, Sam" <sam.cro...@experian.com> writes: > Is it permissible, from a policy perspective, for a multi-homed end user > to announce the numbering resource allocation received from one RIR (for > discussion purposes, let's say ARIN) to upstream service providers in a > different region (for example, in the RIPE region)?
Yes. > Is it feasible from a practical perspective? Sure, people advertise prefixes allocated by ARIN in RIPE and APNIC territory all the time. If that didn't work, multinational networks wouldn't work so well would they? > I've looked through IANA and ARIN policy and can't find anything which > covers such a scenario. I have seen some things about transferring > number resources from one RIR to another RIR, which is similar, but not > exactly the same. That's because the Internet is global in scope. > Suppose you are a large global enterprise, truly globalized in practice, > not in mere name, and performance concerns aside, you provide failover > for Internet access of enterprise users in one region by failing over to > internet access in a different region. Since you probably are using > 10/8 addressing within your network and you NAT the private IPv4 > addresses to a public IPv4 address before sending the traffic on.., so > this works. Given lack of NAT66, and the best practice IPv6 numbering > which is purported to use globally routable IPv6 addresses within your > enterprise network, the achievable way to accomplish the same use > possible today in IPv4 would seem to be to advertise the IPv6 addressing > from one RIR to a ISP in a region governed by a different RIR (or LIR). I have worked for multiple companies where this (or something similar, like anycast, multiple discrete networks, or even international pipes) happens. No problemo. -r
