In a VPLS service, the mesh-sdp vc-id is identical to the service id by default.

In Nokia's Service Router Operating System (SR OS), when configuring a VPLS service, a mesh Service Distribution Path (SDP) is used to create a full mesh of pseudowires between all Provider Edge (PE) routers in the service. Each pseudowire requires a unique Virtual Circuit Identifier (VC-ID) for signaling with its peer. To simplify configuration, if the network administrator does not explicitly define a vc-id for the mesh-sdp, the system automatically and by default uses the VPLS service-id as the vc-id.

This is a True/False question. The statement is factually correct based on the default behavior of the SR OS, so "False" would be incorrect.

1. Nokia 7750 SR OS Services Configuration Guide, Release 21.10.R1, VPLS Command Reference. In the section describing the mesh-sdp command, the parameter vc-id is detailed. The documentation states: "If the vc-id is not specified, the service-id of the VPLS is used as the vc-id."

2. Nokia Virtual Private LAN Service (VPLS) Fundamentals, Student Guide, WB1033-1-001. Module 3: VPLS Configuration. This courseware explains that the vc-id must match between PEs for the pseudowire to be established and notes that its default value is inherited from the service ID.