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Trunk
—A trunk port can forward packets from multiple VLANs. Except packets from the port
VLAN ID (PVID), packets sent out of a trunk port are VLAN-tagged. Assign a trunk port to the
untagged port list of the PVID of the port, and to the tagged port lists of other VLANs.
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Hybrid
—A hybrid port can forward packets from multiple VLANs. You can assign a hybrid port
to the untagged port lists of some VLANs, and to the tagged port lists of other VLANs. An
untagged hybrid port of a VLAN forwards packets from the VLAN without VLAN tags. A tagged
hybrid port of a VLAN forwards packets from the VLAN with VLAN tags.
VLAN interface
For hosts of different VLANs to communicate at Layer 3, you can use VLAN interfaces. VLAN
interfaces are virtual interfaces used for Layer 3 communication between different VLANs. They do
not exist as physical entities on devices. For each VLAN, you can create one VLAN interface and
assign an IP address to it. The VLAN interface acts as the gateway of the VLAN to forward packets
destined for another IP subnet.
Voice VLAN
A voice VLAN is used for transmitting voice traffic. The device can configure QoS parameters for
voice packets to ensure higher transmission priority of the voice packets.
OUI addresses
A device identifies voice packets based on their source MAC addresses. A packet whose source
MAC address complies with an Organizationally Unique Identifier (OUI) address of the device is
regarded as a voice packet. OUI addresses are the logical AND results of MAC addresses and OUI
masks.
The following table shows the default OUI addresses.
Number OUI
address
Vendor
1 0001-E300-0000
Siemens
phone
2 0003-6B00-0000
Cisco
phone
3 0004-0D00-0000
Avaya
phone
4
000F-E200-0000
H3C Aolynk phone
5 0060-B900-0000
Philips/NEC
phone
6 00D0-1E00-0000
Pingtel
phone
7 00E0-7500-0000
Polycom
phone
8 00E0-BB00-0000
3Com
phone
QoS priority setting mode for voice traffic
The QoS priority settings carried in voice traffic include the CoS and DSCP values. You can
configure the device to trust or modify the QoS priority settings for voice traffic. If the device trusts the
QoS priority settings in incoming voice VLAN packets, the device does not modify their CoS and
DSCP values.