LDP IPv6 is supported only on the 7210 SAS-Mxp.
7210 SAS extends the LDP control and data planes to support the LDP IPv6 adjacency and session using 128-bit LSR-ID.
The implementation provides concurrent support of independent LDP IPv4 (32-bit LSR-ID) and IPv6 (128-bit LSR-ID) adjacencies and sessions between peer LSRs and over the same or different set of interfaces.