Background:  We have VS21 and SR1621 appliances connected over a pair of dedicated switches to 5 Linux hosts.  All Linux hosts use jumbo frames and version 7.5 of the aoe driver.  Each host has two interfaces for aoe traffic, plugged into separate switches, as do the VS21 and SR1621.

 

We see about 0.2% packet loss regularly (judging from the rate of retransmits), so I’m trying to understand why.  We’ve already enabled hardware flow control on all host and switch ports carrying aoe traffic.

 

The aoe driver