/proc/sys/net/mpls/* Variables:
  
  platform_labels - INTEGER
  	Number of entries in the platform label table.  It is not
  	possible to configure forwarding for label values equal to or
  	greater than the number of platform labels.
  
  	A dense utliziation of the entries in the platform label table
  	is possible and expected aas the platform labels are locally
  	allocated.
  
  	If the number of platform label table entries is set to 0 no
  	label will be recognized by the kernel and mpls forwarding
  	will be disabled.
  
  	Reducing this value will remove all label routing entries that
  	no longer fit in the table.
  
  	Possible values: 0 - 1048575
  	Default: 0

  
  conf/<interface>/input - BOOL
  	Control whether packets can be input on this interface.
  
  	If disabled, packets will be discarded without further
  	processing.
  
  	0 - disabled (default)
  	not 0 - enabled