Prerequisites for BFD IPv6 Encapsulation Support
When using Bidirectional Forwarding Detection over IPv6 (BFDv6), IPv6 Cisco Express Forwarding and IPv6 unicast routing must be enabled on all participating routers.
When you configure BFD IPv6 software sessions, you should configure the following CLI command:
no ipv6 nd nud igp
If the peer is also an ASR device, the above command should be configured on the peer device too.