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Configuration procedure ···································································································································· 156

Dynamically advertising server-assigned VLANs through LLDP ··············································································· 157

Overview ······························································································································································ 157

Example for using 802.1X to authenticate IP phones ····················································································· 157

Displaying and maintaining voice VLAN ·················································································································· 157

Voice VLAN configuration examples ························································································································· 158

Automatic voice VLAN mode configuration example ····················································································· 158

Manual voice VLAN assignment mode configuration example ····································································· 160

Configuring GVRP ··················································································································································· 162

Overview ······································································································································································· 162

GARP ···································································································································································· 162

GVRP ····································································································································································· 165

Protocols and standards ····································································································································· 165

GVRP configuration task list ········································································································································ 165

Configuring GVRP functions ········································································································································ 166

Configuration restrictions and guidelines ········································································································· 166

Configuration procedure ···································································································································· 166

Configuring the GARP timers ······································································································································ 167

Displaying and maintaining GVRP ····························································································································· 168

GVRP configuration examples ···································································································································· 168

GVRP normal registration mode configuration example ················································································· 168

GVRP fixed registration mode configuration example ···················································································· 170

GVRP forbidden registration mode configuration example ············································································ 171

Configuring QinQ ··················································································································································· 174

Overview ······································································································································································· 174

Background and benefits ···································································································································· 174

How QinQ works ················································································································································ 174

QinQ frame structure ·········································································································································· 175

Implementations of QinQ ··································································································································· 176

Modifying the TPID in a VLAN tag ···················································································································· 176

Protocols and standards ····································································································································· 177

QinQ configuration task list ········································································································································ 177

Configuring basic QinQ ············································································································································· 178

Enabling basic QinQ ·········································································································································· 178

Configuring VLAN transparent transmission ···································································································· 178

Configuring selective QinQ ········································································································································ 179

Configuring an outer VLAN tagging policy ····································································································· 179

Configuring an inner-outer VLAN 802.1p priority mapping ·········································································· 180

Configuring the TPID value in VLAN tags ·················································································································· 181

QinQ configuration examples ···································································································································· 181

Basic QinQ configuration example ··················································································································· 181

Selective QinQ configuration example ············································································································· 184

Configuring LLDP ····················································································································································· 187

Overview ······································································································································································· 187

Background ·························································································································································· 187

Basic concepts ····················································································································································· 187

How LLDP works ·················································································································································· 191

Protocols and standards ····································································································································· 192

LLDP configuration task list ·········································································································································· 192

Performing basic LLDP configuration ·························································································································· 192

Enabling LLDP ······················································································································································ 192

Setting the LLDP operating mode ······················································································································· 193

Setting the LLDP re-initialization delay ·············································································································· 193