andrewgroup Posted August 3, 2010 Report Share Posted August 3, 2010 We have recently upgaded 5 instock CS410's (BLACK) to the latest Firmware & MSP, and were planning an installation. The staff was having their buttocks kicked trying to get PNP operational. We engaged support (thanks) but the internal problems continued. The CS410 was configured with the PUBLIC IP and the internal LAN. Many hours passed, and PNP was non functional as configured. one thing that was said, in the process, was they saw PNP work with the CS410 provided DHCP services. On a hunch, Step 1. assigned the LAN Interface a common local IP address (NO GATEWAY), and assigned a scope to the CS410 DHCP server. We also assigned another STATIC IP to the WAN interfce (NO GATEWAY). With the CS410 and a fresh SNOM phone plugged into a HUB, we were able to get PNP working. We were successful getting several more phones operational too.. NOTE, We also had a PC attached and have captured for reference purposes using WIRESHARK the entire PNP sequence. Step 2. We disabled the CS410 DHCP and using a simple DHCP server on the PC, we were able to duplicate our successes, and again capturing the entire sequence with wireshark. Step 3. We replaced the HUB with a few switches and confirmed the success. The hunch is that whenever a GATEWAY IP is assigned to the CS410, this might be interfering with the PNP processes, by replying on the wrong interface. Remember the CS410 has three interfaces - LAN, WAN, and the 4 port analog gateway. Our next step, is to assign a gateway and work towards making the PNP process fail. (It was consistently failing on all units) We also want to make sure any routers that may have been involved in the earlier testing did not have UPNP enabled. This might interfere too.. We will know (with 100% assurance) what was causing this problem, and we will share the results, any LAB diagrams, traces and tips to anyone interested.... One possibility that might come of this is to not assign any gateways, but only use the ROUTES settings in the CS410. this might offer better security too.... Cheers Quote Link to comment Share on other sites More sharing options...
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