Re: Network very very slow... was iSCSI and jumbo frames

[BERTRAND Joël <joel.bertrand%systella.fr@localhost>]

RVP a écrit :
> On Mon, 8 Feb 2021, BERTRAND Joël wrote:
> 
>>     I have captured tcpdump output on both adapters (I post only one
>> second) :
>>
>> wm0 (to euclide) :
>> 14:06:09.014969 IP legendre.systella.fr.65508 >
>> euclide.systella.fr.iscsi-target: Flags [.], seq 107229888:107238836,
>> ack 78529, win 6528, options [nop,nop,TS val 642769 ecr 43049463],
>> length 8948
>>
> 
> Can you turn off jumbo frames on wm0 and on the NAS? Seeing a window
> size smaller than the frame size is a bit weird.

	Today, I cannot. But when this nas was connected to a Realtek adapter,
I have the same throughput with a standard MTU (driver raises panic when
MTU was greater than 1500).

	Regards,

	JKB