We have just ordered couple of MPLS circuit from our ISP. The ISP will provide the MPLS hand-off to our router i.e. edge router for MPLS cloud is going to be of ISP and from that router it is providing a serial connectivity to our router. At the hub side it is providing one T3/DS3 serial link of mpls hand-off. At remote/spoke site we have a PPP multilink configured (multiple T1's) and this multilink interface is carrying the IP address provided by service provider.
My confusion/question is:
At the hub site we have T3 link, is it like we have to make subinterfaces out of DS3 serial interface and make tunnel interface using those subinterfaces? As we have PPP multilink configured at remote site, we should have multilink interface at hub site too, is it so?
Your response and help is highly appreciated.