iTable of Contents1 Voice VLAN Configuration························································································································1-1Voice VLAN Overview·····························································································································1-1How an IP Phone Works ·················································································································1-1How Switch 4500 Series Switches Identify Voice Traffic ································································1-3Setting the Voice Traffic Transmission Priority ···············································································1-3Configuring Voice VLAN Assignment Mode of a Port ·····································································1-4Support for Voice VLAN on Various Ports·······················································································1-4Security Mode of Voice VLAN ·········································································································1-6Voice VLAN Configuration ······················································································································1-7Configuration Prerequisites ·············································································································1-7Configuring the Voice VLAN to Operate in Automatic Voice VLAN Assignment Mode··········1-7Configuring the Voice VLAN to Operate in Manual Voice VLAN Assignment Mode ·········1-8Displaying and Maintaining Voice VLAN·······························································································1-10Voice VLAN Configuration Example ·····································································································1-10Voice VLAN Configuration Example (Automatic Voice VLAN Assignment Mode) ·······························1-10Voice VLAN Configuration Example (Manual Voice VLAN Assignment Mode) ···································1-13