M200 DHCP issue with Cisco VoIP phones
We have Cisco 7841 and 8851 phones and they are losing connection randomly and will either come back up if I reboot the firewall itself or if left alone long enough they will just start working again. They are getting the correct dhcp address from the firewalls voice vlan network. traffic is tagged. When the phones go down I start seeing denies on the firewall and when they come back up these denies disappear. I don't have much experience so I am not sure what the firewall is trying to tell me. Has anyone experienced this?
image attached to see the denies.
example = 192.168.14.31 192.168.14.255 54031/udp 50-VOIP_IP firebox denied 316 64 (unhandled internal packet-00)