Alcatel Unleashed

Can someone please explain the differences between spoke-SDP and mesh-SDP in terms of MPLS VPNs?

Does one specifically relate to point-to-point (epipe, VPWS, VLL etc) and the other mesh for VPLS?

Why are they used when configuring SDP? the word just seems to be thrown into the config without any explanantion?

Hi.
Short explaination:

SPOKE-SDP is the only one you can configure on an E-PIPE.

A MESH SDP is a loop-prevention type of SDP and is used in VPLS services.
Remember, you are creating a distributed MPLS based layer 2 topology.

Here are the differences when it comes to packet-handling:

A packet entering a service where it is recived from a MESH SDP will _NOT_ be forwarded towards other MESH-SDP's, only towards a SAP or a SPOKE-SDP.

A packet entering a service where it is recieved from a SPOKE-SDP will be forwarded towards any SAP, SPOKE-SDP and MESH-SDP.

A packet entering a service where it is recieved from a SAP will be forwarded towards any SAP, SPOKE and MESH-SDP.

Hope this helps!