Voice VLAN Configuration 1​

Topology

Tasks:

A company is setting up a new network and requires separate VLANs for data and voice traffic. This ensures that voice traffic is prioritized, providing better call quality for IP phones. There are two switches, SW1 and SW2, connected to each other. Each switch has one port connected to an IP phone and a PC. The IP phone is configured to pass data to the PC.

  1. Create VLANs for Data and Voice Traffic
    • Configure VLAN 100 for data traffic, named "DATA".
    • Configure VLAN 200 for voice traffic, named "VOICE".
  2. Configure Access Ports for IP Phone and PC Connectivity
    • Configure the ports connected to the IP phones to support both data and voice VLANs, allowing the PCs to connect through the IP phone.
  3. Set Up Inter-Switch Link
    • Configure the link between SW1 and SW2 to allow traffic for both VLANs.

Solution:

Task 1: Create VLANs for Data and Voice Traffic

  • Configure VLAN 100 for data traffic, named "DATA".
  • Configure VLAN 200 for voice traffic, named "VOICE".

We will create two VLANs on both switches. VLAN 100 named "DATA" for data traffic and VLAN 200 named "VOICE" for voice traffic. This will ensure that both VLANs are recognized on both switches.

On SW1:

SW1#configure terminal
SW1(config)#vlan 100
SW1(config-vlan)#name DATA
SW1(config-vlan)#vlan 200
SW1(config-vlan)#name VOICE
SW1(config-vlan)#exit

On SW2:

SW2#configure terminal
SW2(config)#vlan 100
SW2(config-vlan)#name DATA
SW2(config-vlan)#vlan 200
SW2(config-vlan)#name VOICE
SW2(config-vlan)#exit

 

Task 2: Configure Access Ports with Data and Voice VLANs

We need to set FastEthernet0/1 as an access port on both switches and assign VLAN 100 as the data VLAN and VLAN 200 for voice traffic. This allows the IP phone to tag its own voice traffic with VLAN 200, while untagged traffic (from the PC) defaults to VLAN 100.

On SW1:

SW1(config)#interface f0/1
SW1(config-if)#switchport mode access
SW1(config-if)#switchport access vlan 100
SW1(config-if)#switchport voice vlan 200

On SW2:

SW2(config)#interface f0/1
SW2(config-if)#switchport mode access
SW2(config-if)#switchport access vlan 100
SW2(config-if)#switchport voice vlan 200

 

Task 3: Set Up Inter-Switch Link

  • Configure the link between SW1 and SW2 to allow traffic for both VLANs.

We need to configure the link between SW1 and SW2 as a trunk link and allow it to carry both VLAN 100 (Data) and VLAN 200 (Voice).

On SW1:

SW1(config-if)#interface f0/2
SW1(config-if)#switchport trunk encapsulation dot1q
SW1(config-if)#switchport mode trunk
SW1(config-if)#switchport trunk allowed vlan 100,200

On SW2:

SW2(config-if)#interface f0/2
SW2(config-if)#switchport trunk encapsulation dot1q
SW2(config-if)#switchport mode trunk
SW2(config-if)#switchport trunk allowed vlan 100,200

Now exit the configuration mode and save the configuration.

SW1(config-if)#end
SW1#write memory

SW2(config-if)#end
SW2#write memory

Verification:

Verify VLAN and Trunk configurations using:

SW1#show vlan brief
SW1#show interfaces trunk

 

Packet Tracer File

Clicking this button will begin the download of a ZIP file. Inside the ZIP file, you'll find a Packet Tracer Activity (.pka) file, which will automatically track your progress as you configure the network.

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