Issue with voice vlan on 3560G-48PS code 12.2(35)SE5

Unanswered Question
Jul 16th, 2008

I have an issue where I will add switchport voice vlan x on to the switchport, the ip phone (polycom talking cdp) will work fine on some occasions but not others. If I reboot switch the vlans will not come up automatically on the voice vlan, however if I add the voice vlan one interface at a time they will work but only after the reboot. If a phone gets disconnected for any reason, it will only pick up the data vlan! Also, it wont seem to work if I use the range command, I have to do it one at a time. As you can see results are not consistent. A sho arp on the mac will tell you it has mapped the mac with the new address on the voice vlan but I wont be able to ping it and it is down.

The config is :-

interface GigabitEthernet0/1

description data/phones

switchport access vlan 2

switchport mode access

switchport voice vlan 4

mls qos vlan-based

spanning-tree portfast

I also have tried clear the arp cache doesnt make any difference.

I have this problem too.
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garytayl Wed, 07/16/2008 - 08:06

I experienced something similar in the past with a 3550 and polycom ip phones and at that time I had to upgrade the firmware of the ip phones to resolve my problem.

f.fnlaspect Thu, 07/17/2008 - 01:21

I have checked and the firmware is the same in any other site where it works. They are also using 3560. Although slightly more recent code.

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