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SG 300-28P changes to excluded

Chris Hein
Level 1
Level 1

I have a SG300-28P that when I plug in a Avaya VOIP phone, changes from tagged to excluded on my VLAN 50 that I have set aside for phones.  The phone that doesn't work until I change it back to tagged.  Then if you reboot the phone, it doesn't change it back again and stays working.  How can I prevent having to do this every time I connect a new phone to my switch?

1 Accepted Solution

Accepted Solutions

Hi Chris, depending on the phone model it may not support the CDP message from the auto-voice VLAN assignment. In some phone deployments, it may be best suited to use the LLDP-MED to consistently feed the telephone VLAN tag.

 

Assuming your phone supports LLDP-MED, set up the policy and apply it. If this also does not work then your next option would be telephony OUI where you'd register the phone MAC address to assign the VLAN tag based off that MAC registration.

 

Here's a document to help with LLDP-MED

https://supportforums.cisco.com/document/112876/how-configure-lldp-med-sx300

 

Here's another document to configure the Telephony OUI

https://supportforums.cisco.com/document/112881/how-configure-telephony-oui-sx300

-Tom Please mark answered for helpful posts http://blogs.cisco.com/smallbusiness/

View solution in original post

7 Replies 7

mpyhala
Level 7
Level 7

Chris,

 

Under VLAN Management-> Voice VLAN-> Auto Voice VLAN, is the Voice VLAN ID: set to 50?

 

- Marty

Yes, it is set to 50. 

Hi Chris,

what is your running config (in particularly for the affected port) and mac address table for this problematic port?

Regards,

Aleksandra

It affects all ports.

Hi Chris,

can you share with us?

Aleksandra

What would you like to know?  I use the GUI, so I can't cut and paste.

Hi Chris, depending on the phone model it may not support the CDP message from the auto-voice VLAN assignment. In some phone deployments, it may be best suited to use the LLDP-MED to consistently feed the telephone VLAN tag.

 

Assuming your phone supports LLDP-MED, set up the policy and apply it. If this also does not work then your next option would be telephony OUI where you'd register the phone MAC address to assign the VLAN tag based off that MAC registration.

 

Here's a document to help with LLDP-MED

https://supportforums.cisco.com/document/112876/how-configure-lldp-med-sx300

 

Here's another document to configure the Telephony OUI

https://supportforums.cisco.com/document/112881/how-configure-telephony-oui-sx300

-Tom Please mark answered for helpful posts http://blogs.cisco.com/smallbusiness/
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