Ticket 10 Not working without global addresses
I found the issue with CoPP on R2, but this still did not resolve the issue with R4 being unable to ping FF05::1. I saw with debug ipv6 mfib pak that R3 was dropping the packets received from R4 on Serial0/0.34. However, when I put a global address on the link using 2001:34::/64, the pings started to work. I did not change any of the other links, though.
I'm wondering if it should have worked with link-local addressing between R3 and R4 and if so, why this would have failed. Anyone have any thoughts on this?