MPLS VPN Components 7. MPLS Forwarding
VPN B10.3.0.0
VPN A10.1.0.0
VPN A11.5.0.0
PE
PE
CE
CE
CE
VPN B10.1.0.0
VPN B10.2.0.0
VPN A11.6.0.0
PE
VPN A10.2.0.0
CE
CE
CE
CE
PE
Ingress PE receives normal IP Packets from CE router
PE router does “IP Longest Match”from VPN_B FIB , find iMBGP nexthop PE2 and impose a stack of labels: inner (BGP) label 2 + outer (IGP) label 8
10.3.0.0
P
P
P
P
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