i 
Table of Contents 
1 Voice VLAN Configuration························································································································1-1 
Voice VLAN Overview·····························································································································1-1 
How an IP Phone Works ·················································································································1-1 
How Switch S4210 Identify Voice Traffic·························································································1-3 
Setting the Voice Traffic Transmission Priority ···············································································1-3 
Configuring Voice VLAN Assignment Mode of a Port·····································································1-4 
Support for Voice VLAN on Various Ports·······················································································1-4 
Security Mode of Voice VLAN·········································································································1-6 
Voice VLAN Configuration ······················································································································1-7 
Configuration Prerequisites·············································································································1-7 
Configuring QoS Priority Settings for Voice Traffic on an Interface················································1-7 
Configuring the Voice VLAN to Operate in Automatic Voice VLAN Assignment Mode··········1-8 
Configuring the Voice VLAN to Operate in Manual Voice VLAN Assignment Mode·········1-9 
Displaying and Maintaining Voice VLAN·······························································································1-11 
Voice VLAN Configuration Example ·····································································································1-12 
Voice VLAN Configuration Example (Automatic Voice VLAN Assignment Mode) ·······························1-12 
Voice VLAN Configuration Example (Manual Voice VLAN Assignment Mode)···································1-13