vRtrMplsTunnelCHopIpv6PrefixLen 1.3.6.1.4.1.6527.3.1.2.6.12.1.7

If vRtrMplsTunnelCHopAddrType is set to ipV6(2), this value will contain the prefix length for this hop's IPv6 address. This object is otherwise insignificant and should contain a value of 0.