C
HAPTER
28
| Voice VLAN Commands
– 491 –
voice vlan discovery
protocol
This command displays or sets the method used to detect VoIP traffic on a
port.
SYNTAX
voice vlan discovery protocol [port-list] [oui | lldp | both]
port-list - A specific port or a range of ports. (Range: 1-28, or all)
oui - Traffic from VoIP devices is detected by the Organizationally
Unique Identifier (OUI) of the source MAC address.
lldp - Uses LLDP to discover VoIP devices attached to the port.
both - Both OUI table lookup and LLDP are used to detect VoIP
traffic on a port.
DEFAULT SETTING
OUI
COMMAND USAGE
◆ When OUI is selected, be sure to configure the MAC address ranges in
the Telephony OUI list (see the voice vlan oui add command. MAC
address OUI numbers must be configured in the Telephony OUI list so
that the switch recognizes the traffic as being from a VoIP device.
◆ LLDP checks that the “telephone bit” in the system capability TLV is
turned on. See "LLDP Commands" on page 441 for more information on
LLDP.
EXAMPLE
The following example enables the OUI method on port 1 for detecting
VoIP traffic.
Voice/VLAN>discovery protocol 2 lldp
Voice/VLAN>
voice vlan mode This command displays or sets the global Voice VLAN mode for the switch.
SYNTAX
voice vlan mode [enable | disable]
enable - Enables Voice VLAN operation on the switch.
disable - Disables Voice VLAN operation on the switch.
DEFAULT SETTING
Disabled
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