I have a situation where I have configured switchport to access access vlan 4 and voice vlan 12. Need less to say I have all the necessary vlan configured. I am using Sangoma S500 phones. So When I plug the phone in Its pulling ip from the Data/access vlan.
Phones are capable of doing lldp and I have that enabled. I have tried using being that enabled as well but no different result being seen.
I know this work for Cisco phones but why not any other phones. I have seen similar issue on aastra phones. Due to short time to do research I interchange the vlan value and it worked. I don't want to do this for learning purposes.
Switch is cisco 3750G and below is the switchport configuration.
"switchport access vlan 12
switchport mode access
switchport voice vlan 3
switchport port-security maximum 2
switchport port-security maximum 1 vlan access
switchport port-security violation restrict
srr-queue bandwidth share 1 30 35 5
mls qos trust device cisco-phone
mls qos trust cos
auto qos trust
Hopefully I will get this clear with your help.