A problem on TCP in High RTT Environment.

[Eggert, Lars]

Hi,

On 2014-8-10, at 5:48, Niu Zhixiong <kaiaixi at gmail.com> wrote:
> I am using Intel I350-T4 NIC.

igb driver?

I've been having weird issues with this driver under 10-RELEASE, too. On one machine, I had to limit hw.igb.num_queues=2 in order to get any sort of useful connectivity. On another machine, I had to severely bump kern.ipc.nmbclusters & friends. I'm not sure this is the issue here, since SCTP seems to be working OK, but I'm not trusting igb NICs at the moment.

Lars
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