A.ASBR1 sends an IPv4 update for prefix 192.168.1.0/27 to ASBR2.

B.PE1 sends an IPv4 update for prefix 192.168.1.0/27 via MP-BGP to ASBR1.

C.ASBR1 transforms an IPv4 update for prefix 192.168.1.0/27 to a VPN-IPv4 route; allocates VPN label V1 and sends the update to ASBR2.

D.ASBR2 accepts a VPN-IPv4 update from ASBR1, then sends the update to PE2 via MP-BGP.

A.Sap 1/1/1 create

B.No shutdown

C.Sap 1/1/1 customer 10 create

D.Neighbor 192.168.1.2

A.ASBR2 sends the IP packet with one label to ASBR1.

B.ASBR1 sends the IP packet with one label to PEL

C.PE2 pushes one label on the IP packet and forwards it to ASBR2.

D.PE1 pops one label off the IP packet and forwards it to CE1.

A.MP-eBGP exchange of VPN-IPv4 routes between PEs residing in different autonomous systems.

B.A VRF-to-VRF connection at the autonomous system border routers.

C.MP-eBGP exchange of labeled IPv4 routes between route reflectors residing in different autonomous systems.

D.MP-eBGP exchange of VPN-IPv4 routes between ASBRs residing in different autonomous systems.

A.Traditional BGP loop detection mechanisms may detect a loop in the VPRN scenario, which in fact is not present.

B.When the CLI command "config>router>bgp# loop-detect discard-route" is used, the Nokia 7750 SR sends a notification to the remote peer and drops the BGP session.

C.In VPRN implementations where the CE-PE protocol is BGP, it is possible for separate sites of the same customer to use the same BGP autonomous system number.

D.The Nokia 7750 SR accepts routes containing AS_PATH loops by default.