ECS3510-26P_Management Guide R02

C HAPTER 12 | VoIP Traffic Configuration
Configuring VoIP Traffic Ports
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first ensure that VLAN membership is not set to access mode (see "Adding
Static Members to VLANs" on page 171).
PARAMETERS
These parameters are displayed:
◆ Mode – Specifies if the port will be added to the Voice VLAN when VoIP
traffic is detected. (Default: None)
■
None – The Voice VLAN feature is disabled on the port. The port will
not detect VoIP traffic or be added to the Voice VLAN.
■
Auto – The port will be added as a tagged member to the Voice
VLAN when VoIP traffic is detected on the port. You must select a
method for detecting VoIP traffic, either OUI or 802.1ab (LLDP).
When OUI is selected, be sure to configure the MAC address ranges
in the Telephony OUI list.
■
Manual – The Voice VLAN feature is enabled on the port, but the
port must be manually added to the Voice VLAN.
◆ 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 that discovers 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 vendors 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 "Link Layer Discovery
Protocol" on page 376 for more information on LLDP.
◆ Priority – Defines a CoS priority for port traffic on the Voice VLAN. The
priority of any received VoIP packet is overwritten with the new priority
when the Voice VLAN feature is active for the port. (Range: 0-6;
Default: 6)
◆ Remaining Age – Number of minutes before this entry is aged out.
The Remaining Age starts to count down when the OUI’s MAC address
expires from the MAC address table. Therefore, the MAC address aging
time should be added to the overall aging time. For example, if you
configure the MAC address table aging time to 30 seconds, and the
voice VLAN aging time to 5 minutes, then after 5.5 minutes, a port will