Every document I find on QoS sidetracks me with apparent requirements of IB or RoCE instead of simply telling me the minimum I need to do beyond creating an Ethernet header containing layer 2 CoS bits in a VLAN tag and/or doing the equivalent in an IP header DSCP sextet. In addition, my first experiment in attempting to do so, without any preliminary switch configuration led to a tcpdump capture on the receiving host with more than 100 ms between frames sent with only a nominal 10-µsec usleep between them. The same code run without a SX6036 issued over 1000 frames in less time than the one in the lab took to complete 100 or fewer. I've found very little about using Ethernet alone and obtaining desired behavior. What documents have I missed?
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