[OmniOS-discuss] flow control with Intel x520da

[Dan McDonald]

> On Jan 8, 2016, at 4:19 PM, Doug Hughes <doug at will.to> wrote:
> 
> Interesting issue with flow control that I can't prove but suspect is ixgbe driver related. I wonder if anybody has seen this. The switch is Dell Force10 S4810. I have enabled bidirectional flow control on the port. (standard broadcomm chipset).
> 
> If I turn on rx flow control in the driver by editing /kernel/drv/ixgbe.conf, everything works just fine.
> 
> If I turn on bidir flow control in the driver, the port doesn't work at all. Instead, what I see on the switch is approximately 1000 multicast packets inbound per second (or something that registers as multicast that is probably some attempt at flow control). Running snoop on the ixgbe interface shows nothing at all in this mode. Not even standard multicast traffic from the switch.

I've seen issues with flow-control before in ixgbe.  Can you take this to the illumos developer's list, as it's better suited for the wider audience?

Thanks,
Dan