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Voice VLAN assignment modes
A port connected to a voice device, an IP phone for example, can be assigned to a voice VLAN in one
of the following modes:
•
Automatic mode
—The system matches the source MAC addresses in the protocol packets
(untagged packets) sent by the IP phone upon its power-on against the OUI list. If a match is found,
the system automatically assigns the receiving port to a voice VLAN, issues ACL rules and
configures the packet precedence. You can configure an aging timer for the voice VLAN. The
system will remove the port from the voice VLAN when the aging timer expires if no voice packet is
received on the port during the aging timer. The system automatically assigns ports to, or removes
ports from, a voice VLAN. 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 simultaneously
transmit both voice traffic and data traffic, as shown in
Figure 153
. When the voice VLAN works
correctly, if the system reboots, the system reassigns ports in automatic voice VLAN assignment
mode to the voice VLAN after the reboot, making sure existing voice connections can work correctly.
In this case, voice traffic streams do not trigger port assignment to the voice VLAN.
Figure 153
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
Figure 154
. In this mode, ports assigned to a voice VLAN transmit voice traffic
exclusively, which prevents the impact of data traffic on the transmission of voice traffic.
Figure 154
Only IP phones access the network
Both modes forward tagged packets according to their tags.
Table 46
and
Table 47
list the configurations required for ports of different link types to support tagged
or untagged voice traffic sent from IP phones when different voice VLAN assignment modes are
configured.
Содержание Compaq Presario,Presario 1910
Страница 35: ...22 Figure 16 Sort display based on MAC address in the ascending order ...
Страница 54: ...41 Figure 27 Configuration finishes ...
Страница 70: ...57 Figure 42 Configuring idle timeout period 3 Set the idle timeout period for logged in users 4 Click Apply ...
Страница 98: ...85 Figure 67 Displaying the rate settings of ports ...
Страница 114: ...101 Figure 82 Port traffic statistics NOTE When the bandwidth utilization is lower than 1 1 is displayed ...
Страница 158: ...145 Field Description OutErrors Number of invalid packets sent through the interface ...
Страница 202: ...189 Figure 177 Creating a static MAC address entry ...
Страница 230: ...217 Figure 193 Configuring MSTP globally on Switch D ...
Страница 359: ...346 5 View the operation result in the Summary area Figure 316 IPv6 traceroute operation result ...