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I used VRF to separate witch routers or customers should be routed (connected) throw MPLS Cloud network infrastructure. In VRF I used RD (Route Distinguisher) to distinguish (mark) set of routes. VRF’s RD (Route Targets) we used to choose witch VRF’s routes to export and witch to import in VRF.
OSPF we use as internal connection between routers P in MPLS Core network and PE routers, so we can later use MP-BGP. MP-BGP we must use to connect distance locations (routers) in MPLS Cloud network. That is because MP-BGP is used to exchange VPNv4 routes with other PE devices. MP-BGP propagates virtual routing and forwarding (VRF) reachability information to all members of a VPN community. EIGRP we use to advertise routes on CE routers. Then we use those routes to redistribute in MP-BGP and send to other side of MPLS Cloud, there other MP-BGP PE router redistribute that routers in EIGRP so other CE router have that routes. In that way CE router can communicate with other CE router on other side of MPLS Cloud network.
MPLS for IPsec we must use GRE with IPsec. GRE tunnel is encapsulating MPLS packets, and send it to other side of tunnel. Then other side of tunnel takes of encapsulation and sends to customer. If we want encryption with MPLS we use IPsec in GRE.
For security all routers are protected from not authorized staff with password and with warning for people who try to connect....

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