i have SF300-48P switch and some ip phone, all configuration seems OK, i have many type of IP Phone one of them was 3905, when i plug the phone to the switch, it only got data vlan not join in voice vlan i have created in the switch, i see that others ip phone going OK.
FYI : data vlan should have IP address :192.168.9.x and voice vlan should have IP : 192.168.4..x
i attach the pic LLDP and CDP neighbor status,also vlan table from the switch.
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The switch configuration seems to be ok to me therefore I would point to the phone as the problem, particularly considering other IP phones work just fine on the given setup. I would anyways suggest you to contact the Small Business Support Center to figure this out;
When you check the Dynamic MAC address table of the switch, do you see the phone MAC address associated with the voice vlan along with the data vlan? Also, if it is not required, turn off the LLDP on the switch and let the devices explore each other using CDP only and see if that helps.
CP-3905 is connected to Cisco Small Business SF300-24P. LLDP-MED is enabled in the switch port with a network policy advertising the voice VLAN.
CP-3905 fails to learn and change the operational VLAN value from 4095 to the advertised vlan id. Please see attached packet captures. The phone advertises its own capabilities and the switch replies back with the network policy. It seems that CP3905 is not processing it.
After disabling LLDP Tx in the switch port, CP3905 learns the vlan id via CDP.
-Tom Please mark answered for helpful posts
Please mark answered for helpful posts
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