1. Label distribution method for distributing a label between a first Multiprotocol Label Switching network element (PE 1 ) and a second peering Multiprotocol Label Switching network element (PE 1 ) in a Multiprotocol Label Switching network (MPLSN), said label identifying a context of a single flow of data-packets, forwarded from said first Multiprotocol Label Switching network elements (PE 1 ) towards said second peering Multiprotocol Label Switching network element (PE 2 ), CHARACTERISED IN THAT said method comprises the steps of: a. said first Multiprotocol Label Switching network element (PE 1 ) adding an unused label to a first data-packet (DP 1 ), of said single flow before the step of forwarding said single flow; b. said second Multiprotocol Label Switching network element (PE 2 ), determining a context of said single flow of data-packets by applying a predetermined algorithm if a label in said first packet of said single flow is said unused label; and c. said second Multiprotocol Label Switching network element (PE 2 ) coupling said unused label and said context, determined by applying said predetermined algorithm.