- This stub article exists to document how some hardware versions in the WNDR3500-series suffer from a flaw in the DHCP-server design that prevents it from properly assigning IP addresses to devices that properly and strictly implement the DHCP specification - including our phones. This is a known bug in the Netgear firmware for this router, however Netgear has declined to issue a fix.
- Many firmware versions do have an option to disable DNS relay/proxy, causing DNS lookup timeouts on Polycom phones. That setting needs to be disabled to prevent intermittent or frequent phone registration failures.
- Therefore, we do not recommend this router since it's compatibility can be hit or miss, depending on what firmware version you are using.
- This routers also come with SIP ALG enabled by default.
- Also WAN Pings is disabled by default, which is an optional setting that is needed to allow the router to respond to our Call Quality Monitoring and Troubleshooting Ping Server.
- Perform the changes in the article Netgear: Instructions For Many Netgear Routers.
- If IP addressing related issues persist and/or if DNS proxy/relay still cannot be disabled after making the changes above and upgrading the router's firmware:
- Then you will need to replace your Netgear router with a different serviceable or recommended router if you do not have one already.
- Smarsh Hosted Services cannot setup the new router for you, but your IT or the manufacturer of your new router can help you.
- They will need to move settings from the old to the new router to ensure your computers and other devices on the network work properly.