Can you use default vlan 1 for data vlan?

[mark l]

Most of the online setup guide describes: vlan10 for data, vlan 20 for voice and there is a default vlan 1.

Can I use default vlan 1 for data? so I only have two vlans instead of three.. vlan 1 for data, vlan 20 for voice? Is there a reason we don't setup like this?

Thanks,

[Julio E. Moisa · Accepted solution]

Hi Mark

The vlan 1 is the default vlan, it is included on the factory settings on the switches and it cannot be deleted. You can use this vlan 1 for data but this vlan should be shutdown as good practice for security purposes. You can create vlans for data and voice. 

You can create many vlans on the switches using the following command:

configure terminal

vlan <vlan id to create>

example:

vlan 100
name IT

vlan 107
name WIFI

vlan 205
name VOICE-SUBNET1

vlan 157
name VOICE-SUBNET2

Now they can be assigned to switchports, example:

interface fa1/0/1
switchport mode access
switchport access vlan 100   <--- for data
switchport voice vlan 157   <---- for voice
no shutdown

You can see the created vlans and the interface assigned to them, using the command: show vlan brief

This link could be useful: 

http://www.ciscopress.com/articles/article.asp?p=2181837&seqNum=11

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/12-2_55_se/configuration/guide/scg_2960/swvlan.html

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