IPv6 address for seamless BFD over static segment routing MPLS LSPs

Support IPv6 address family for seamless Bidirectional Forwarding Detection (S-BFD) over static segment-routing MPLS LSPs. The mode of operation for sBFD support for IPv6 in centralised and distributed mode is as follows: 

•  IPv6 support for sBFD over static segment routing MPLS LSP for responder and initiator in distributed mode. 
•  IPv6 support for sBFD over static segment routing MPLS LSP for initiator in centralised mode. 

sBFD IPv6 responder session can only be configured by including the local-ipv6-address configuration statement at the [edit protocols bfd sbfd local-discriminator disc ] hierarchy level as follows: 

user@host# set protocols bfd sbfd local-discriminator disc local-ipv6-address ipv6-address 

The IPv6 address that is configured is used as the source IPv6 address in the reply packet.