131
Step Command Remarks
3. Add a recognizable OUI
address.
voice vlan mac-address
oui
mask
oui-mask
[
description
text
]
Optional.
By default, each voice VLAN has
default OUI addresses
configured. For the default OUI
addresses of different vendors,
see Table 14.
4. Enter interface view.
interface
interface-type
interface-number
N/A
5. Configure the port to operate
in manual voice VLAN
assignment mode.
undo voice vlan mode auto
By default, the manual voice
VLAN assignment mode is
disabled.
6. Assign the access, trunk, or
hybrid port in manual voice
VLAN assignment mode to
the voice VLAN.
For the configuration procedure,
see "Configuring port-based
VLANs."
After you assign an access port to
the voice VLAN, the voice VLAN
becomes the PVID of the port
automatically.
7. Configure the voice VLAN as
the PVID of the trunk or
hybrid port.
For the configuration procedure,
see "Configuring port-based
VLANs."
Optional.
T
his operation is required for
untagged inbound voice traffic
and prohibited for tagged inbound
voice traffic.
8. Enable voice VLAN on the
port.
voice vlan
vlan-id
enable
Disabled by default.
Enabling LLDP to automatically discover IP
phones
In a traditional voice VLAN network, the switch maps the source MAC addresses of IP phones to a
limited number of OUI addresses to allow them to access the network. This method restricts the
types of IP phones on the network, if the IP phones with the source MAC addresses match the same
OUI address are categorized as a type.
To break the restriction, you can enable the switch to automatically discover IP phones through LLDP.
With this function, the switch can automatically discover the peer, and exchange LLDP TLVs with the
peer. If the LLDP System Capabilities TLV received on a port shows that the peer can act as a
telephone, the switch sends an LLDP TLV with the voice VLAN configuration to the peer.
When the IP phone discovery process is complete, the port will continue the following voice VLAN
configuration:
• Join the voice VLAN.
• Increase the transmission priority of the voice traffic sent from the IP phone.
To ensure that the IP phone can pass authentication, the device will add the MAC address of the IP
phone to the MAC address table.
Configuration prerequisites
Before you enable the switch to automatically discover IP phones through LLDP, complete the
following tasks:
• Enable LLDP globally and on ports.
• Configure voice VLANs.
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