--- In "ocean_research_jk" <> wrote:
>
> I've been struggling all week with this issue. I have a few instruments
> connected on serial ports. I collect the incoming data and pump it out on a
> tcp port. When there is a packet lost. I see something like this (although
> it varies)-
> packet1
> ack for 2
> packet2
> ack for 3
> packet4
> ack for 3 (DUP)
> (slight pause)
> packet5 (full size)
> ack for 3 (DUP)
> packet6 (full size)
> ack for 3 (DUP)
>
> (pause for 3 to 10 minutes)
>
> packet3
>
> This long long delay really bogs down the system. I've tried changing some
> tcp setting like window_scaling, sack, etc. The only improvement was to up
> the buffer memory, which keeps the connection from getting dropped in some
> instances, depending on how many segments get lost. Any idea how to get a
> quicker retransmit?
>
There were some posts on here, some I think from Technologic staff, about
network problems on the TS7500/7550 series. It is do with the built in NIC,
apparently, it keeps deconfiguring itself. The Technologic guy said that they
had been working with the chip vendor and tried lots of documented and
undocumented internal settings to no avail.
So please feel free to address Technologic directly to ask if they are making
progress on this problem.
Martin
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