The value of the object tmnxL2tpTuMlpppMaxLinks specifies
the maximum number of MLPPP links.
The value of this object is only relevant for tunnels where this system
performs the LNS role.
The value zero specifies that the actual value must be used
of the object tmnxL2tpTgMlpppMaxLinks of the tunnel group
this tunnel configuration belongs to.