[cisco-voip] Switch port configs

[Shine Joseph]

If you are connecting a non-Cisco IP phone to a switch, you will need to configure the port as trunk. As Cisco phones/switches uses CDP to work out voice VLAN trunk configuration is not required, though it works well. Due to the management overhead and the security concerns this configuration is not recommended.

When configured with the second option, the switch port gets configured as trunk, internally, but allows only two VLANs - Voice VLAN and the access VLAN.

HTH

Cheers,
Shine


e the port as

From: Scott Voll 
Sent: Tuesday, October 12, 2010 1:10 AM
To: cisco-voip at puck.nether.net 
Subject: [cisco-voip] Switch port configs


is there anything wrong with having your switch ports configured as follows? 


 switchport trunk encapsulation dot1q
 switchport trunk native vlan 14
 switchport mode trunk
 switchport voice vlan 146


Normally I would have them set like:


switchport access vlan 14
switchport voice vlan 146


These are 3560's running 12.2 code.


TIA


Scott


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