126Configuring a port to operate in manual voice VLANassignment modeFollow these steps to set a port to operate in manual voice VLAN assignment mode:To do... Use the command... RemarksEnter system view system-view —Enable the voice VLAN securitymode voice vlan security enable OptionalEnabled by default.Add a recognizable OUI address voice vlan mac-address oui maskoui-mask [ description text ]OptionalBy default, each voice VLAN hasdefault OUI addresses configured.For the default OUI addresses ofdifferent vendors, see Table 14.Enter Layer 2 Ethernet interfaceviewinterface interface-typeinterface-number —Configure the port to operate inmanual voice VLAN assignmentmodeundo voice vlan mode auto RequiredDisabled by defaultAssign the port (access, trunk, orhybrid) in manual voice VLANassignment mode to the voiceVLANFor how to assign a port to aVLAN, see the chapter "VLANconfiguration."RequiredAfter you assign an access port tothe voice VLAN, the voice VLANbecomes the default VLAN of theport automatically.Configure the voice VLAN as thedefault VLAN of the port (trunk orhybrid)For how to assign a port to aVLAN, see the chapter "VLANconfiguration."OptionalThis operation is required foruntagged inbound voice trafficand prohibited for tagged inboundvoice traffic.Enable voice VLAN on the port voice vlan vlan-id enable RequiredNOTE:• Only one VLAN is supported and only an existing static VLAN can be configured as the voice VLAN.• Voice VLAN cannot be enabled on a port with Link Aggregation Control Protocol (LACP) enabled.• To make voice VLAN take effect on a port that is enabled with voice VLAN and operates in manual voiceVLAN assignment mode, you need to assign the port to the voice VLAN manually.Enabling LLDP to automatically discover IP phonesIn a traditional voice VLAN network, the switch maps the source MAC addresses of IP phones to a limitednumber of OUI addresses to allow them to access the network. This method restricts the types of IPphones on the network, if the IP phones with the source MAC addresses match the same OUI address arecategorized as a type.To break the restriction, you can enable the switch to automatically discover IP phones through LLDP. Withthis function, the switch can automatically discover the peer, and exchange LLDP TLVs with the peer. If the
