ii
Creating a primary VLAN ··········································································································· 32
Creating secondary VLANs ········································································································ 32
Associating the primary VLAN with secondary VLANs······································································ 33
Configuring the uplink port ········································································································· 33
Configuring a downlink port ········································································································ 33
Configuring Layer 3 communication for secondary VLANs ································································ 34
Display and maintenance commands for the private VLAN ······························································· 35
Private VLAN configuration examples ··························································································· 35
Example: Configuring promiscuous ports ················································································ 35
Example: Configuring trunk promiscuous ports ········································································ 38
Example: Configuring trunk promiscuous and trunk secondary ports ············································ 41
Example: Configuring Layer 3 communication for secondary VLANs ············································ 45
Configuring voice VLANs ································································· 48
About voice VLANs ·················································································································· 48
Working mechanism ·········································································································· 48
Methods of identifying IP phones ·························································································· 48
Advertising the voice VLAN information to IP phones ································································ 49
IP phone access methods ··································································································· 49
Voice VLAN assignment modes ··························································································· 50
Cooperation of voice VLAN assignment modes and IP phones ··················································· 51
Security mode and normal mode of voice VLANs ····································································· 52
Restrictions and guidelines: Voice VLAN configuration ····································································· 52
Voice VLAN tasks at a glance ····································································································· 53
Configuring the QoS priority settings for voice traffic ········································································ 53
Configuring voice VLAN assignment modes for a port ······································································ 54
Configuring a port to operate in automatic voice VLAN assignment mode ······································ 54
Configuring a port to operate in manual voice VLAN assignment mode ········································· 55
Enabling LLDP for automatic IP phone discovery ············································································ 56
Configuring LLDP or CDP to advertise a voice VLAN ······································································· 56
Configuring LLDP to advertise a voice VLAN ··········································································· 56
Configuring CDP to advertise a voice VLAN ············································································ 57
Display and maintenance commands for voice VLANs ····································································· 57
Voice VLAN configuration examples ···························································································· 58
Example: Configuring automatic voice VLAN assignment mode ·················································· 58
Example: Configuring manual voice VLAN assignment mode ····················································· 59
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