POLYCOM VVX 411 not getting IPv4 address from SF200-24FP

[AEGTOperations22615]

Hello,

I have 10 Polycom VVX 411 phones that are connected to our Cisco SF200-24FP switch that is stand alone from our network. The phones receive power over ethernet from the switch. We had somebody install all the phones onto the Switch and everything was working fine until 3 of our phones suddenly lost their IPv4 address.  I was able to plug the 3 phones directly into our network DHCP server and the phones connected and received IPv4 addresses just fine. So it is not the phones.

We rebooted the Cisco switch and the phones are still not receiving an IP address.  We do not have the admin password for the switch so the next thing to do is to reset the switch to Factory, but I do not know if there was a special configuration for setting up these phones.

I do not know why the Cisco switch is not giving the phones an IPv4 address.

Please Help!

[Gregory Brunn]

This is more a question for the small business support group.  Think your posting in the wrong place.

My experience with the small business switches it is probably a VLAN issue or something of that matter.

What happens when you plug a pc into the same port do you get DHCP?

If not can you manually assign yourself to the subnet space and ping the gateway or any other host on that subnet. If not vlan is my guess.

https://www.cisco.com/c/en/us/support/switches/sf200-24fp-24-port-10-100-full-poe-smart-switch/model.html

[AEGTOperations22615]

Thank You for this.