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Weird issue with wired connection on XD6

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epyon9283

New Around Here
Just switched from nest wifi to a 3 node XD6 system. Since the router now has three LAN ports instead of one I removed the switch I was using and plugged my intel NUC directly into the router. My NUC is running Fedora server with a VM or two. When I have the machine connected directly to the router I get horrible upload speeds when running iperf or librespeed.

I noticed that the "rx_missed_errors" count shoots up when I run a speed test. I tried increasing the RX ring size from 256 to 4096 to see if maybe it was a buffer issue but same problem occurs.

When I place a dumb l2 switch between the router and the PC the issue disappears.

The only differences I noticed when looking at ethtool on the PC is that when connected directly, MDI-X is on and RX/TX pause is off. When connecting through the switch MDI-X is off and pause is on.

Anyone see this before or know if there's something I can change on the XD6 to fix so I don't have to keep a switch around?
 

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