3com 5500-ei pwr Installation Instruction

 

1-11 

As shown in

z 

The MAC address of IP phone A is 0011-1100-0001. The phone connects to a downstream device 

named PC A whose MAC address is 0022-1100-0002 and to GigabitEthernet 1/0/1 on an upstream 

device named Device A. 

z 

The MAC address of IP phone B is 0011-2200-0001. The phone connects to a downstream device 

named PC B whose MAC address is 0022-2200-0002 and to Ethernet GigabitEthernet1/0/2 on 

Device A. 

z 

Device A uses voice VLAN 2 to transmit voice packets for IP phone A and IP phone B. 

z 

Configure GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 to work in automatic voice VLAN 

assignment mode. In addition, if one of them has not received any voice packet in 30 minutes, the 

port is removed from the corresponding voice VLAN automatically. 

Figure 1-2 Network diagram for voice VLAN configuration (automatic mode) 

Device A

Device B

GE1/0/1

GE1/0/1

IP phone B
010-1002
MAC: 0011-2200-0001
Mask: ffff-ff00-0000

0755-2002

GE1/0/2

IP phone A

010-1001

MAC: 0011-1100-0001

Mask: ffff-ff00-0000

Internet

PC A

MAC: 0022-1100-0002

PC B

MAC: 0022-2200-0002

 

# Create VLAN 2. 

<DeviceA> system-view 

[DeviceA] vlan 2  

# Set the voice VLAN aging time to 30 minutes.  

[DeviceA] voice vlan aging 30 

# Configure VLAN 2 as a voice VLAN.  

[DeviceA] voice vlan 2 enable 

# Since GigabitEthernet 1/0/1 may receive both voice traffic and data traffic at the same time, to ensure 

the quality of voice packets and effective bandwidth use, configure voice VLANs to work in security 

mode, that is, configure the voice VLANs to transmit only voice packets. (Optional. By default, voice 

VLANs work in security mode.) 

[DeviceA] voice vlan security enable