Fix your routing or just use one prefix. Yes.... it isn't unfortunatly. Linux does have it for IPv4 also but not for IPv6.

All right, I understood Jeroen's answer as "if you need it, code it!" - so I coded :) On ftp://ftp.sniff.de/pub/ipv6/ I've stored "FBSD48-PBR-v10patch" which is the patch for the "ip6fw" program and the kernel. See also the README file. The new code allows the use of the "forward" statement in the ip6fw packet filter for outgoing packets and thus allows source-based routing (or "policy-based routing" if you are marketing-empowered). The new kernel runs stable for two days now on my "production" server. The code (and the server ;-) survived several tests. Still be aware that this is not official FBSD code, two days are not much time and if you don't need it then don't change your running system. Also the code allows you to do some stupid things like configuring routing loops. On the other hand it allows you to "multi-home" a server in a propper manner. One can implement "virtual servers" on layer3. I was able to test applications with packets traversing the network although start and end address was on the same server (!) Anyway, like it or leave it ;) Marc