Satellite Earth Stations and Systems (SES); Broadband Satellite Multimedia (BSM); Multi-Protocol Label Switching (MPLS) interworking over satellite; Part 2: Negotiation and management of MPLS labels and MPLS signalling with attached networks (V1.1.1)
The BSM/MPLS technical specifications extend and complement the existing BSM functional architecture ([1] to [3]) and the SI-SAP interface [4] to enable transport of MPLS signalling and data flows over a BSM network@ in a way such that MPLS networks connected by different STs can communicate as if they were connected by standard terrestrial LSRs (label switched routers). In this general scope@ TS 102 856-1 [13] clarifies the main architectural issues@ including operational scenarios and protocol stacks@ and discusses how BSM-compliant STs can be designed and configured to address MPLS-specific tasks. The present document@ clarifies the signalling issues related to the use of MPLS in BSM systems@ with a particular focus on the case when the LSR is completely integrated in an ST; in this case the ST still acts in a BSM-compliant manner over the satellite@ but it also behaves as a classical LSR on its terrestrial interface to external networks. The setup of multicast MPLS paths is considered out of scope.