S300 Phones losing IP/Gateway/DNS after extension registration

@sredmond wrote:

I've been fighting with this for a week now and I am at a loss of what to do. I'm trying to deploy S500 and S300 phones the S500 are receiving an IP and Configs and just working. The S300 are receiving and IP, then losing it at receiving Configs. They are configured on a Chan_Sip on port 5160 due to 5060 problems with Spectrum internet.

Barracuda Firewall/Gateway
Cisco S300 managed switch
PBXact 100
7 S500 phones
38 S300 phones

During the initial bootup of the phone, it receives its IP address via DHCP and displays it on the phone then moves on to show "bridge mode" then the Mac address. It proceeds to get the updated firmware and its configurations and does a reboot. After the reboot, it will not show an IP address during the bootup but the DHCP server still shows it active. The Network Info page in the phone shows an IP of 0.0.0.0 but the gateway and DNS are correct. If I reboot the phone again, the DHCP server does not show the phone online and everything in the Network Info page in the phone has been reset to zeros.

It only grabs an IP from a factory reset before it does a firmware update.

I decided to bypass the Cisco switch completely and run a dedicated LAN IP from the Barracuda. The S300 phones would receive the IP from the DHCP Server and attempt to register the extension. after attempting to register the extension, it would reboot and move everything in the IP config on the phone back 0.0.0.0 and the phone would show offline on the DHCP server. I have reverted everything back to yesterday's configuration in the Barracuda System since the switch did not resolve the issue.

S300 phones - I have learned I hate them.
- Will not take an IP via DHCP after configurations and attempted registration of the extension
- will not communicate to firewall/gateway with static IP configured on the phone
- will not a reserved IP that is handed out by the firewall/gateway tied to the phones mac address, although the firewall/gateway will occasionally show it online, the phone itself will never show that it has an IP

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