Thank for your explain. I just want to know ISP PE router can advertise single route or default route to our CE router only ?
I think it is MPLS connection.it is private network.
My CE router config is not too much.DC and branches router are same configuration in my side.Only change AS number for each site.we are using EBGP.
router bgp 65XX
neighbor 198.XX.XX.XX remote-as XXX