12-31-2014 07:56 AM
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?
Solved! Go to Solution.
01-05-2015 02:32 PM
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
12-31-2014 04:42 PM
Chris,
Under VLAN Management-> Voice VLAN-> Auto Voice VLAN, is the Voice VLAN ID: set to 50?
- Marty
01-05-2015 08:53 AM
Yes, it is set to 50.
01-05-2015 10:06 AM
Hi Chris,
what is your running config (in particularly for the affected port) and mac address table for this problematic port?
Regards,
Aleksandra
01-05-2015 10:07 AM
It affects all ports.
01-05-2015 10:38 AM
Hi Chris,
can you share with us?
Aleksandra
01-05-2015 11:18 AM
What would you like to know? I use the GUI, so I can't cut and paste.
01-05-2015 02:32 PM
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
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