To configure a distributed service from ALA-A to ALA-B, the SDP ID (4) (Figure: A GRE SDP pointing from ALA-A to ALA-B) must be specified in the service creation process to ‟bind” the service to the tunnel (the SDP). Otherwise, service traffic is not directed to a far-end point and the far-end 7450 ESS and 7750 SR device cannot participate in the service (there is no service).
Figure: A GRE SDP pointing from ALA-A to ALA-B
