Re: Data sitting and remaining in Send-Q

[Thorsten Kranzkowski]

On Mon, Dec 24, 2001 at 08:44:37PM -0000, Alex Bligh - linux-kernel wrote:
> > That would give a different result: "functional TCP connections" or
> > "non-functional TCP connections". Mine are between that. If data gets
> > sent in small chunks, everything is fine, but if it's a larger
> > transfer (more than one ethernet frame may transport???), write()
> > stalls (or non-blocking write returns), but data is kept in
> > Send-Q rather than being sent down to the client.
> 
> Just to check the completely obvious:
> 
[...]
> 
> If you have an L3 device (router etc.) in the middle, you can get
> a similar effect if the device does not fragment data correctly
> (for instance the Cisco into ip tunnels bug - now fixed I think),
> or, if you are using PMTU discovery (probably), if some evil device,

Jan,
do you have some DSL Modem in between?

Thorsten

-- 
| Thorsten Kranzkowski        Internet: [e-mail]                      |
| Mobile: ++49 170 1876134       Snail: Niemannsweg 30, 49201 Dissen, Germany |
| Ampr: dl8bcu@db0lj.#rpl.deu.eu, [e-mail] [44.130.8.19] |