HP FlexNetwork NJ5000 User Manual page 140

IP phones connected in series access the network through the device and ports on the device
simultaneously transmit both voice traffic and data traffic, as shown in
voice VLAN works normally, if the system reboots, 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, voice traffic streams do not trigger port assignment
to the voice VLAN.
Figure 132 PCs and IP phones connected in series access the network
•
Manual mode—You must assign the port to a voice VLAN manually. Then, the system matches
the source MAC addresses in the packets against the OUI addresses. If a match is found, the
system issues ACL rules and configures the packet precedence. In this mode, you must
manually assign ports to, or remove ports from, a voice VLAN. Manual mode is suitable for
scenarios where only IP phones access the network through the device, and ports on the
device transmit only voice traffic, as shown in
voice VLAN transmit voice traffic exclusively, which prevents the impact of data traffic on the
transmission of voice traffic.
Figure 133 Only IP phones access the network
Both modes forward tagged packets according to their tags.
Table 52 and Table 53
tagged or untagged voice traffic sent from IP phones when different voice VLAN assignment modes
are configured.
•
IP phones send tagged voice traffic
Table 52 Required configurations on ports of different link types for them to support
tagged voice traffic
Port link
type
Access
Trunk
list the configurations required for ports of different link types to support
Voice VLAN assignment
mode supported for tagged
voice traffic
Manual
Automatic and manual
128
133. In this mode, ports assigned to a
Figure
Configuration requirements
Configure the PVID of the port as the voice VLAN.
In automatic mode, the PVID of the port cannot
be the voice VLAN.
In manual mode, configure the port to permit
packets of the voice VLAN to pass through.
Figure 132. When the