Manual Mode; Cooperation Of Voice Vlan Assignment Modes And Ip Phones - H3C S7500E-X Configuration Manual

When the device reboots, the port is reassigned to the voice VLAN to ensure the correct operation of
the existing voice connections. The reassignment occurs automatically without being triggered by
voice traffic as long as the voice VLAN operates correctly.

Manual mode

Use manual mode when only IP phones access the network through the device, as shown in
51. In this mode, ports are assigned to a voice VLAN that transmits voice traffic exclusively. No data
traffic affects the voice traffic transmission.
You must manually assign the port that connects to the IP phone to a voice VLAN. The device uses
the source MAC address of the received voice packets to match its OUI addresses. If the match
succeeds, the device issues ACL rules to set the packet precedence.
To remove the port from the voice VLAN, you must manually remove it.
Cooperation of voice VLAN assignment modes and IP
phones
Some IP phones send out VLAN-tagged packets, and others send out only untagged packets. For
correct packet processing, ports of different link types must meet specific configuration requirements
in different voice VLAN assignment modes.
Access ports do not transmit tagged packets.
Table 11 Configuration requirements for trunk and hybrid ports to support tagged voice
traffic
Port link
type
Trunk
Hybrid
When IP phones send out untagged packets, you must configure the voice VLAN assignment mode
as manual.
Table 12 Configuration requirements for ports in manual mode to support untagged voice
traffic
Port link
type
Access
Trunk
Hybrid
Voice VLAN
assignment mode
Automatic
Manual
Automatic
Manual
Configuration requirements
The voice VLAN must be the PVID of the port.
The voice VLAN must be the PVID of the port.
The port must forward packets from the voice VLAN.
The voice VLAN must be the PVID of the port.
The port must forward packets from the voice VLAN without VLAN tags.
Configuration requirements
The PVID of the port cannot be the voice VLAN.
The PVID of the port cannot be the voice VLAN.
The port must forward packets from the voice VLAN.
The PVID of the port cannot be the voice VLAN.
The PVID of the port cannot be the voice VLAN.
The port must forward packets from the voice VLAN with VLAN
tags.
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Figure