@Its-A-Trap I might have had luck with updating to the latest firmware, ER605(UN)_V2_2.2.5 Build 20240522. I have since decided to go with another vendor, and will be returning my ER605, but about 3...

@Clive_A thanks for picking this up! Some more info, I was able to capture the LAN side of the network at the same time as the WAN and linked the packets back to the source on my network. So the MAC...

@Its-A-Trap we are probably neighbors! That is some great information. I had seen some of that but hadn't put it together. I have read that turning of HW offloading kills the throughput pretty bad....

@Clive_A sorry it has been a while. I have some captured frames from the WAN interface but first let's catch up. I had though things had cleared up after removing VLANs and factory resetting the...

This reconfiguration has been in place for ~12 hours now without issues. I hate to jinx it but I am confident it was something to do with having a device on the WAN/LAN port. One more change I made...

@Clive_A Thanks for responding. The ISP is Astound, formerly Wave-G, a smaller regional ISP. The service is provided via ethernet in a multi-tenant mix use building. Each group of floors has a switch...