In MPLS VPN, where must MP-BGP peering be configured?
A.
in all CE routers within a VPN community
B.
in all CE routers across a VPN community
C.
in all PE routers within a VPN community
D.
in all PE routers across a VPN community
E.
in all PE and CE routers within a VPN community
F.
in all PE and CE routers across a VPN community