Hello, I have a 7201 and an ASR1000 and they share a link and run ipv4 and bgp over it no problem. I am experimenting and have now added some static ipv6 configuration, and I can't seem to ping across the link. The issue looks like one side us advertising prefixes correctly and the other isn't. Here's my interface configs: ASR1000: interface TenGigabitEthernet0/1/0.110025 encapsulation dot1Q 25 second-dot1q 11 ip address x.x.x.1 255.255.255.248 ipv6 address xxxx:yyyy::1:1/126 end 7201: interface GigabitEthernet0/0.110025 encapsulation dot1Q 25 second-dot1q 11 ip address x.x.x.2 255.255.255.248 ipv6 address xxxx:yyyy::1:2/126 end When I try pinging 7201 from the asr1000, no response. I do see a neighbor entry on the asr1000: sh ipv6 neighbors IPv6 Address Age Link-layer Addr State Interface xxxx:yyyy::1:2 0 xxxx.yyyy.8e1b REACH Te0/1/0.110025 FE80::xxxx:yyyy:FE49:8E1B 0 xxxx.yyyy.8e1b REACH Te0/1/0.110025 On the 7201 however, there seems to only be the link local address neighbor entry for the asr1000: sh ipv6 neighbors IPv6 Address Age Link-layer Addr State Interface FE80::xxxx:yyyy:FE2D:D190 0 xxxx.yyyy.d190 STALE Gi0/0.110025 Can anyone spot what I am doing wrong? Mike-