C
HAPTER
36
| VLAN Commands
Configuring Voice VLANs
– 869 –
DEFAULT SETTING
OUI: Enabled
LLDP: Disabled
COMMAND MODE
Interface Configuration
COMMAND USAGE
◆ When OUI is selected, be sure to configure the MAC address ranges in
the Telephony OUI list (see the voice vlan mac-address 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 951 for more information on
LLDP.
EXAMPLE
The following example enables the OUI method on port 1 for detecting
VoIP traffic.
Console(config)#interface ethernet 1/1
Console(config-if)#switchport voice vlan rule oui
Console(config-if)#
switchport voice
vlan security
This command enables security filtering for VoIP traffic on a port. Use the
no form to disable filtering on a port.
SYNTAX
[no] switchport voice vlan security
DEFAULT SETTING
Disabled
COMMAND MODE
Interface Configuration
COMMAND USAGE
◆ Security filtering discards any non-VoIP packets received on the port
that are tagged with the voice VLAN ID. VoIP traffic is identified by
source MAC addresses configured in the Telephony OUI list, or through
LLDP that discovers VoIP devices attached to the switch. Packets
received from non-VoIP sources are dropped.
◆ When enabled, be sure the MAC address ranges for VoIP devices are
configured in the Telephony OUI list (voice vlan mac-address).
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