The value of tmnxBsxTransPrefEntryNetAddrType specifies
the address type of the network address prefix associated
with this transit prefix policy entry.
tmnxBsxTransPrefEntryNetAddrType can be 'unknown(0)' indicating
the network address prefix is not used for matching. If the
value is not 'unknown(0)' and tmnxBsxTransPrefEntrySubAddrType
is not 'unknown(0)', then tmnxBsxTransPrefEntryNetAddrType must
have the same value as tmnxBsxTransPrefEntrySubAddrType.