Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

3750X showing MAC address on data and voice vlan

Hi All


I have a 3750X with SP Services software.  What I am seeing is the phone mac address is appearing on the data and voice vlan.  I have other switches 2960 and 3750 and it is not showing MAC address on both VLANs.  Any ideas?  The 3750X LAN base image is not showing on both VLANs.  Is this a bug?

Cisco Employee

From my knowledge it has

From my knowledge it has nothing to do with the lan base or sp services.

Lets look into it together:


Can you please provide me with the following infomration:

1- Show ver from the 3750X Lan base

2- Connect the laptop to the switch directly and check if its learning the mac addres?

3- Once it learn then connect your ip phone to another port and see if the switch is providing power to it and the phone is getting power on ?

4- show log outputs



CreatePlease to create content