Switch Working - 4: Voice Vlan and It's Configuration

In This section we focused on the following questions

• what is voice vlan?
• How voice vlan is differ from data vlan?
• How to configure a voice vlan?

In previous section we have discussed about normal and extended vlan, which is used to send the normal data packets over the internet while voice vlan have some special feature which allow user to send voice data packets.
in this section we will discuss the features and configuration of voice vlan 

For this scenario if we have a ip phone connected in our network, sending the voice signal to the switch, so the switch have to be configured with separate vlan, called voice vlan which Is going to carry only your voice traffic

Requirement for Voice vlan and ip phone :-

v  voice vlan feature enables access ports to carry ip voice traffic form an ip phone

v  switch can connect to ip phone to Carry ie  voice traffic

v  cisco ip phone contains an integrated three-port 10/100 switch

• one is like a access port connected with switch
• another connected with computer system
• port of switch connected with ip phone it can be part of both the vlan (data/voice vlan)
• which will allow the traffic from pc-phone-switch

Default vlan configuration:-

• Voice vlan feature is disabled by default
• Voice vlan can be configured on switch’s access port
• The voice vlan should be present and active on switch for ip phone to correctly communicate with voice vlan
• Port fast feature is enabled automatically when the voice vlan is configured

Voice vlan configuration:-

•  In our scenario we are taking three switch port.
• One for a dedicated data port
• One for a dedicated voice port
• And one for both data and voice vlan
• Create vlan 20 for DaTA and Vlan 30 for Voice
• Assign port connected with pc  to the data vlan and one port to voice vlan for ip phone

Switch>en

Switch#config t

Enter configuration commands, one per line. End with CNTL/Z.

           Switch(config)#vlan 20

Switch(config-vlan)#name Data

Switch(config-vlan)#vlan 30

Switch(config-vlan)#name Voice

Switch(config-vlan)#in fa 0/3

Switch(config-if)#switchport mode access

Switch(config-if)#switchport access vlan 20

Switch(config-if)#interface fa 0/4

Switch(config-if)#switchport mode access

Switch(config-if)#switchport voice vlan 30

Switch(config-if)#in fa 0/5

Switch(config-if)#switch mode access

Switch(config-if)#switchport access vlan 10

Switch(config-if)#switchport voice vlan 30

Note :-it’s a basic configuration required on switch ,configuration on router also needed.

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