The value of tmnxOamTrCtlTgtAddrType specifies the type of host
address to be used as the destination for performing a OAM Trace
Route operation. Only 'ipv4', 'ipv6' and 'dns' address types are
supported.
This object indicates the type of address stored in the
corresponding tmnxOamTrCtlTgtAddress object.
The 'dns' address type is valid only for 'icmpTraceRoute'.