Wireshark-users: Re: [Wireshark-users] TCP behavior under strict CAR rate-limiting
From: Sake Blok <[email protected]>
Date: Thu, 19 Jun 2008 23:44:52 +0200
On Thu, Jun 19, 2008 at 08:10:17AM -0700, Christopher Hunt wrote:

>     I expected that the cause would be excessive drops by the Cisco 
> interface causing the TCPs on either end to negotiate a low 
> tcp_receive_window, but the packets don't bear that out.  The window 
> sizes are staying high. The cisco interface doesn't show many drops nor 
> does it ever seem to receive the 10mbps rate, even for a second.  I 
> expect that even retransmits, duplicate ACKS etc. would increment packet 
> counters on the Cisco.Any ideas what else could cause low throughput 
> besides a low tcp_receive_window? 

What do you see in the network capture?
Maybe you could supply a small section of your capture file?