ipv6AddrPfxLength 1.3.6.1.2.1.55.1.8.1.2

The length of the prefix (in bits) associated with the IPv6 address of this entry. This object is obsoleted by the IP-MIB::ipAddressPrefixLength in the row of the IP-MIB::ipAddressPrefixTable to which the IP-MIB::ipAddressPrefix points.