MPLS VPN Topologies Inter-provider VPNs
Green
PE4
Site-4
N4
PE6
Site-3
iMBGP VPN-IPv4 updates exchanged between PEs
N3
PE5
PE1
Site-1
N1
PE3
Site-2
N2
PE2
iMBGP VPN-IPv4 updates exchanged between PEs
Sub-interface per VPN
Routing updates over VRF sub-interfaces
IPv4 updates
ASBR
ASBR
global
Red
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