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GVRP forbidden registration mode configuration example ············································································ 181
Configuring loopback detection ···························································································································· 183
Overview ······································································································································································· 183
Basic concepts in loopback detection ··············································································································· 183
How loopback detection works ························································································································· 184
Loopback detection configuration task list ················································································································ 185
Enabling loopback detection ······································································································································ 185
Enabling loopback detection in system view···································································································· 185
Enabling loopback detection in VLAN view ····································································································· 186
Configuring the loopback detection action ··············································································································· 186
Configuring the loopback detection interval ············································································································· 186
Displaying and maintaining loopback detection ······································································································ 187
Loopback detection configuration example ·············································································································· 187
Network requirements ········································································································································· 187
Configuration procedure ···································································································································· 187
Verifying the configuration ································································································································· 189
Configuring VLAN termination ······························································································································· 191
Overview ······································································································································································· 191
VLAN termination types ······································································································································ 191
Application scenarios ········································································································································· 191
VLAN termination networking solutions ············································································································ 192
VLAN termination configuration task list ··················································································································· 194
Configuring QinQ termination ··································································································································· 194
Configuring unambiguous QinQ termination ·································································································· 194
Configuring ambiguous QinQ termination ······································································································· 195
Enabling a VLAN termination-enabled interface to transmit broadcast and multicast packets ··························· 195
Configuring the TPID for VLAN-tagged packets ········································································································ 196
VLAN termination configuration examples ················································································································ 196
Unambiguous QinQ termination configuration example ················································································ 196
Ambiguous QinQ termination configuration example ···················································································· 198
Ambiguous QinQ termination configuration example (lite solution) ····························································· 201
Configuration example for QinQ termination supporting DHCP relay ························································· 203
Configuring MAC-in-MAC ······································································································································ 207
Overview ······································································································································································· 207
Basic concepts ····················································································································································· 207
MAC-in-MAC frame encapsulation ··················································································································· 208
MAC-in-MAC frame forwarding ························································································································ 209
Protocols and standards ····································································································································· 210
MAC-in-MAC configuration task list ··························································································································· 210
Enabling L2VPN ··························································································································································· 210
Creating a MAC-in-MAC instance ····························································································································· 210
Configuring a B-VLAN ················································································································································· 211
Configuring an uplink port ·········································································································································· 211
Configuring an uplink port in VSI view ············································································································· 212
Configuring an uplink port in interface view ···································································································· 212
Configuring a downlink port ······································································································································· 212
Applying a global CAR action ··································································································································· 213
Displaying and maintaining MAC-in-MAC ··············································································································· 213
MAC-in-MAC configuration example ························································································································ 214
Network requirements ········································································································································· 214
Configuration procedures ··································································································································· 214
Verifying the configuration ································································································································· 215
Troubleshooting ···························································································································································· 215
