[j-nsp] TCP

[John Neiberger]

As others have said, check the TCP receive window on the receiving end of
that slow transfer. There's a good chance that you don't have window
scaling enabled on that device. You may already know this, but here's a
link to the details that I've found to be helpful.

http://www.psc.edu/index.php/networking/641-tcp-tune

John

On Wed, Nov 19, 2014 at 2:18 PM, Johan Borch <johan.borch at gmail.com> wrote:

> Hi!
>
>
> I'm doing some performance troubleshooting between two linux systems, the
> servers are located in each end of an L3VPN, with a bunch of routers
> between them.
>
> Using Iperf and UDP I get ~1Gbps in both directions
> Using iperf and TCP i get ~400Mbps in one direction and ~60Mbps in the
> other direction
>
> Could this still be a network problem or should I dig on the linux side?
>
> Johan
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