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| Configuring the Switch
C
4
HAPTER
Managing VoIP Traffic
Auto
– The port will be added as a tagged member to the Voice
3
■
VLAN when VoIP traffic is detected on the port. You must select a
method for detecting VoIP traffic, either OUI or LLDP (802.1ab).
When OUI is selected, be sure to configure the MAC address ranges
in the Telephony OUI list.
Forced
– The Voice VLAN feature is enabled on the port.
3
■
◆
Security – Enables security filtering that 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 which is used to discover VoIP
devices attached to the switch. Packets received from non-VoIP sources
are dropped. (Default: Disabled)
Discovery Protocol – Selects a method to use for detecting VoIP
◆
traffic on the port. (Default: OUI)
OUI – Traffic from VoIP devices is detected by the Organizationally
■
Unique Identifier (OUI) of the source MAC address. OUI numbers
are assigned to manufacturers and form the first three octets of a
device MAC address. 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 – Uses LLDP (IEEE 802.1ab) to discover VoIP devices
■
attached to the port. LLDP checks that the "telephone bit" in the
system capability TLV is turned on. See
Protocol"
for more information on LLDP.
Both – Both OUI table lookup and LLDP are used to detect VoIP
■
traffic on a port.
This option only works when the detection mode is set to "Auto." LLDP
should also be enabled before setting the discovery protocol to "LLDP"
or "Both." Note that changing the discovery protocol to "OUI" or "LLDP"
will restart auto detection process.
W
I
EB
NTERFACE
To configure VoIP traffic settings:
Click Configuration, Voice VLAN, Configuration.
1.
Configure any required changes to the VoIP settings for the switch or
2.
for a specific port.
Click Save.
3.
– 170 –
"Link Layer Discovery
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