iv
Tunnel selection order configuration example ································································································· 158
Preferred tunnel and tunnel selection order configuration example ······························································ 158
Configuring MPLS L3VPN ······································································································································· 161
Overview ······································································································································································· 161
Basic MPLS L3VPN architecture ························································································································· 161
MPLS L3VPN concepts ········································································································································ 162
MPLS L3VPN route advertisement ······················································································································ 163
MPLS L3VPN packet forwarding ························································································································ 164
MPLS L3VPN networking schemes ····················································································································· 165
Inter-AS VPN ························································································································································ 167
Carrier's carrier ··················································································································································· 172
Nested VPN ························································································································································· 173
HoVPN ·································································································································································· 174
OSPF VPN extension ··········································································································································· 176
BGP AS number substitution ······························································································································· 179
MPLS L3VPN FRR ················································································································································· 179
Protocols and standards ····································································································································· 181
MPLS L3VPN configuration task list ···························································································································· 181
Configuring basic MPLS L3VPN ································································································································· 182
Configuration prerequisites ································································································································ 182
Configuring VPN instances ································································································································ 182
Configuring routing between a PE and a CE ··································································································· 184
Configuring routing between PEs ······················································································································ 189
Configuring BGP VPNv4 route control ············································································································· 190
Configuring inter-AS VPN ··········································································································································· 192
Configuring inter-AS option A ···························································································································· 192
Configuring inter-AS option B ···························································································································· 192
Configuring inter-AS option C···························································································································· 193
Configuring nested VPN ·············································································································································· 197
Configuring HoVPN ····················································································································································· 198
Configuring an OSPF sham link ································································································································· 199
Configuring a loopback interface ····················································································································· 199
Redistributing the loopback interface route ······································································································ 200
Creating a sham link ··········································································································································· 200
Specifying the VPN label processing mode on the egress PE ················································································· 201
Configuring BGP AS number substitution ·················································································································· 201
Configuring MPLS L3VPN FRR ···································································································································· 201
Enabling SNMP notifications for MPLS L3VPN ········································································································· 204
Displaying and maintaining MPLS L3VPN ················································································································ 204
MPLS L3VPN configuration examples ························································································································ 205
Configuring basic MPLS L3VPN ························································································································ 205
Configuring a hub-spoke network ····················································································································· 211
Configuring MPLS L3VPN inter-AS option A ···································································································· 218
Configuring MPLS L3VPN inter-AS option B ····································································································· 223
Configuring MPLS L3VPN inter-AS option C ···································································································· 228
Configuring MPLS L3VPN carrier's carrier ······································································································· 234
Configuring nested VPN ····································································································································· 242
Configuring HoVPN ············································································································································ 251
Configuring an OSPF sham link ························································································································ 259
Configuring BGP AS number substitution ········································································································· 263
Configuring MPLS L3VPN FRR through VPNv4 route backup for a VPNv4 route ········································ 267
Configuring MPLS L3VPN FRR through VPNv4 route backup for an IPv4 route ··········································· 269
Configuring MPLS L3VPN FRR through IPv4 route backup for a VPNv4 route ············································· 271
