3Com S7906E Configuration Manual page 1514

1 MPLS L3VPN Configuration ·····················································································································1-1
MPLS L3VPN Overview ··························································································································1-1
Introduction to MPLS L3VPN ··········································································································1-1
MPLS L3VPN Concepts ··················································································································1-2
MPLS L3VPN Packet Forwarding ···································································································1-5
MPLS L3VPN Networking Schemes ·······························································································1-6
MPLS L3VPN Routing Information Advertisement··········································································1-8
Multi-AS VPN···································································································································1-9
Carrier's Carrier ·····························································································································1-12
Nested VPN···································································································································1-14
HoVPN···········································································································································1-16
OSPF VPN Extension····················································································································1-19
BGP AS Number Substitution ·······································································································1-21
MPLS L3VPN Configuration Task List ··································································································1-22
Configuring VPN Instances···················································································································1-23
Creating a VPN Instance ···············································································································1-23
Associating a VPN Instance with an Interface ··············································································1-23
Configuring Route Related Attributes of a VPN Instance······························································1-24
Configuring a Tunneling Policy of a VPN Instance ·······································································1-25
Configuring Basic MPLS L3VPN···········································································································1-26
Configuration Prerequisites ···········································································································1-26
Configuring a VPN Instance ··········································································································1-26
Configuring Route Advertisement between PE and CE································································1-27
Configuring Route Advertisement Between PEs···········································································1-31
Configuring Routing Features for BGP VPNv4 Subaddress Family ·············································1-32
Configuring Inter-Provider VPN ············································································································1-35
Configuration Prerequisites ···········································································································1-35
Configuring Inter-Provider VPN Option A······················································································1-35>
Configuring Inter-Provider VPN Option B······················································································1-36
Configuring Inter-Provider VPN Option C······················································································1-37
Configuring Nested VPN·······················································································································1-39
Configuration Prerequisites ···········································································································1-39
Configuring Nested VPN ···············································································································1-39
Configuring HoVPN·······························································································································1-40
Configuration Prerequisites ···········································································································1-40
Configuring HoVPNs ·····················································································································1-40
Configuring OSPF Sham Link···············································································································1-41
Configuration Prerequisites ···········································································································1-41
Configuring a Loopback Interface ·································································································1-42
Advertising Routes of a Loopback Interface ·················································································1-42
Creating a Sham Link ····················································································································1-42
Configuring BGP AS Number Substitution ···························································································1-43
Configuration Prerequisites ···········································································································1-43
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