Virtual Private Routed Network Services
7750 SR OS Services Guide Page 857
Figure 1: Virtual Private Routed Network
Routing Prerequisites
RFC2547bis requires the following features:
• Multi-protocol extensions
• LDP support
• Extended BGP community support
• BGP capability negotiation
• Parameters defined in RFC 2918, BGP Route Refresh and RFC 2796, Route Reflector
• 4-byte autonomous system (AS) number
Tunneling protocol requirements are as follows:
• RFC2547, BGP/MPLS VPNs, recommends implementing Label Distribution Protocol
(LDP) to set up a full mesh of LSPs based on the IGP
• MPLS RSVP-TE tunnels can be used instead of LDP
• Generic Router Encapsulation (GRE) tunnels can also be alternatively used
OSSG024
PE PE
PE
PE
PP
PP
IP/MPLS Cloud
CE5
VPN:Red
CE6
VPN:Green
CE1
VPN:Red
CE2
VPN:Green
CE4
VPN:Green
CE3
VPN:Red
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