Update: After much fiddling, I finally got these devices to work stably (one in the switch mentioned below, another in the Intel x520-DA2). The most important thing to note is NO JUMBO FRAMES - yes you are limited to 1500 byte frames. That being said, I can transfer around 7.5 Gbps in a single thread, and "full" 10 Gbps with multi-threaded iperf. They're also very picky about resetting and auto-negotiating speed (x520 always reports 10 Gb/s even when connected at 1 Gb/s). If you have trouble connecting, try physically reinstalling the module. A reboot is not enough to reset, a full physical shutdown is required (especially on the switch side). I was only able to get 1Gbps and 10Gbps modes to work over Cat6a (about 20m). First check: Two S+RJ10 modules tested with a 317-1G-16S+RMOS 6.43 router However, they keep dropping packets and any client connected through these modules cannot reliably connect to anything. The modules bridge 1 and 10Gbps depending on whether they are communicating with another 1Gb or 10Gb network adapter on the other end; However, the connection is unstable in all cases. Often modules need to be reset before clients can establish a Layer 3 connection (I can reliably get a Layer 2 connection, but often a client sits there and never gets an IP address from a DHCP server despite the correct connection speed ).
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