HP 5820X Series

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system automatically assigns the receiving port to the voice VLAN, issues ACL rules and configures
the packet precedence.
Configure voice VLAN aging time on the device. The system will remove a port from the voice
VLAN if no packet is received from the port during the aging time. Assigning/removing ports
to/from a voice VLAN are automatically performed by the system.
The automatic mode is suitable for scenarios where PCs and IP phones connected in series access
the network through the device and ports on the device transmit both voice traffic and data traffic
at the same time, as shown in Figure 44.
When the voice VLAN works normally, in case of a
system reboot, the system reassigns ports in automatic voice VLAN assignment mode to the voice
VLAN after the reboot, ensuring that existing voice connections can work normally. In this case,
port assignment to the voice VLAN is not triggered by voice traffic streams.
Figure 44 PCs and IP phones connected in series access the network
• In manual mode, you need to manually assign an IP phone accessing port to a voice VLAN. Then,
the system matches the source MAC addresses carried in the packets against the device’s OUI
addresses. If a match is found, the system issues ACL rules and configures the packet precedence. In
this mode, assigning/removing ports to/from a voice VLAN are performed manually.
The manual mode is suitable for scenarios where only IP phones access the network through the
device and ports on the device only transmit voice traffic, as shown in Figure 45. In this mode,
ports assigned to a voic
e VLAN transmit voice traffic exclusively, which prevents the impact of data
traffic on the transmission of voice traffic.
Figure 45 Only IP phones access the network
Both modes forward tagged packets according to their tags.
Table 17 and
Table 18 list the required configurations on ports of different link types in order for these
ports to support tagged or untagged voice traffic sent from IP phones when different voice VLAN
assignment modes are configured.
• IP phones send tagged voice traffic