THere shouldn't be any issues here. If you've set up both interfaces to auto-negotiate speed and duplex, and that's not working, try hard-coding them and see how that goes. Does the interface actually come up on the PIX and router? What does a "sho int" on both devices say (up/up or up/down)?
You can hard code the speed/duplex settings on the PIX with the following:
We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...