It's not difficult to find even home users with multiple ISP links. Both ISP's send RA's with different prefixes (A=1).
Host sees now two default routers on link and will have multiple global addresses. By current rules, host can use either router for outgoing packets regardless of the selected source address. I think it would be more sensible to pick the default router from the set of routers that actually advertised the prefix matching the selected source address? This would be a simple way to avoid hitting the filters of the ISP's, when wrong source address (for that ISP) is used. The IPv6 architecture assumes all routers on link "co-operate", but I think that is too much to expect from simple "home routers", the ISP would be supplying... it's better to put some intelligence into host requirements? -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
