Diference btw Spoke and TLDP

[speedmann]

Hello all,
Could someone please help me out about the differences between spoke-SDP and targeted LDP (TLDP)?.
Secondly I would like to know why some SDps are configured iunder interfaces rather than under services?.
Thanks

[vasudha202]

Spoke sdp is the configuration you use to bind an sdp to a service. Technically a mesh-sdp also does the same thing. The difference between calling them spoke-sdp or mesh-sdp is in the way traffic is flooded through them.
T-LDP is a type of LDP protocol that is used to send messages between the end-points of the spoke-sdp, including signaling service labels, which is needed for the spoke-sdp to come up.
The basic sequence is:
- configure the sdp and bring it up
- configure spoke-sdp at both ends using the sdp (spoke-sdp <sdp-id>:<vc-id>)
- make sure targeted LDP session is created (either use signaling tldp under the spoke-sdp or configure targeted-peer under ldp on both ends
- the tLDP session is used to exchange service labels
- spoke-sdp comes up