HPE FlexFabric 5940 SERIES

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When the IP phone 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 Figure
65. 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 15 Configuration requirements for trunk and hybrid ports to support tagged voice
traffic
Port link
type
Voice VLAN
assignment mode
Configuration requirements
Trunk
Automatic The PVID of the port cannot be the voice VLAN.
Manual
The PVID of the port cannot be the voice VLAN.
The port must forward packets from the voice VLAN.
Hybrid
Automatic The PVID of the port cannot be the voice VLAN.
Manual
The PVID of the port cannot be the voice VLAN.
The port must forward packets from the voice VLAN with VLAN
tags.
When IP phones send out untagged packets, you must set the voice VLAN assignment mode to
manual.
Table 16 Configuration requirements for ports in manual mode to support untagged voice
traffic
Port link
type
Configuration requirements
Access The voice VLAN must be the PVID of the port.
Trunk
The voice VLAN must be the PVID of the port.
The port must forward packets from the voice VLAN.
Hybrid
The voice VLAN must be the PVID of the port.
The port must forward packets from the voice VLAN without VLAN tags.