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Displaying and maintaining isolation groups ············································································································· 93
Port isolation configuration example···························································································································· 93
Configuring QinQ ······················································································································································ 95
Introduction to QinQ ······················································································································································ 95
Background and benefits ······································································································································ 95
How QinQ works ·················································································································································· 95
QinQ frame structure ············································································································································ 96
Implementations of QinQ ····································································································································· 97
Modifying the TPID value in a VLAN tag ············································································································ 97
Protocols and standards ······································································································································· 98
QinQ configuration task list ·········································································································································· 98
Configuring basic QinQ ··············································································································································· 98
Setting the TPID value in VLAN tags ···························································································································· 99
Basic QinQ configuration example ····························································································································· 99
Configuring BPDU tunneling ··································································································································· 102
Introduction to BPDU tunneling ··································································································································· 102
Background ·························································································································································· 102
BPDU Tunneling implementation ························································································································ 103
Configuring BPDU tunneling ······································································································································· 104
Configuration prerequisites ································································································································ 104
Enabling BPDU tunneling for a protocol ··········································································································· 104
Configuring destination multicast MAC address for BPDUs ··········································································· 105
BPDU tunneling configuration example ····················································································································· 105
Configuring GVRP ··················································································································································· 107
Introduction to GVRP ···················································································································································· 107
GARP ···································································································································································· 107
GVRP ····································································································································································· 110
Protocols and standards ····································································································································· 111
GVRP configuration task list ········································································································································ 111
Configuring GVRP functions ········································································································································ 111
Configuring GARP timers ············································································································································ 112
Displaying and maintaining GVRP ····························································································································· 113
GVRP configuration examples ···································································································································· 114
GVRP normal registration mode configuration example ················································································· 114
GVRP fixed registration mode configuration example ···················································································· 115
GVRP forbidden registration mode configuration example ············································································ 117
Configuring VLAN termination ······························································································································· 119
Overview ······································································································································································· 119
Introduction to VLAN termination ······················································································································ 119
VLAN termination types ······································································································································ 119
Application scenarios ········································································································································· 119
VLAN termination configuration task list ··················································································································· 121
Configuring TPID for VLAN-tagged packets ·············································································································· 121
Configuring TPID on a Layer 3 Ethernet/aggregate subinterface ································································· 123
Configuring TPID on a Layer 2 Ethernet or aggregate interface ···································································· 123
Configuring QinQ termination ··································································································································· 125
Configuring unambiguous QinQ termination ·································································································· 125
Configuring ambiguous QinQ termination ······································································································· 126
VLAN termination configuration examples ················································································································ 126
Unambiguous QinQ termination configuration example ················································································ 126
Ambiguous QinQ termination configuration example ···················································································· 128
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