5G port on BGW320-500 receives DNS timeouts
I just upgraded to AT&T Fiber 300 Internet from DSL 50. They replaced my BGW210-700 router which always worked fine with a BGW320-500 router.
The router has a Blue Port which is 5G. I asked the AT&T guy who installed it if I could connect any device with a 1G ethernet adapter to it and he said sure, that it would negotiate the speed down to 1G. I connected my Windows 10 desktop to it and have been having lots of very weird problems for over the past 2 days. Things like cameras not working well with live view but recording fine, timeouts when I boot my desktop to Linux, Synology DSM backup client not working etc. I was able to browse the internet fine, but every once in a while, there would be a weird problem or slowdown. I have 3 other switches connected to the BGW320-500 (TP Link 16 port switch and 2 TP Link 5 port POE switches for cameras). My entire setup worked fine before the fiber upgrade.
I was finally able to determine that the problem was related to DNS timeouts on my Desktop. I could see it repeatedly in a command window doing nslookup commands. The address of the DNS server was IPv6 Prefix::1 (i.e. 2600:xxxx:yyyy:zzzz::1). Now my device is connected directly to the router and the DNS server is running on the router - yet it gets a 2 second timeout one or 2 times before it resolves the hostname.
I switched my device to a port on the TP link switch and all the problems went away. DNS lookups were fast. Live view on the cameras worked fine etc.
Is there a problem with the 5G port on the BGW320-500 ?