thanks Jifl.

On Mon, Nov 3, 2008 at 8:57 PM, Jonathan Larmour <[EMAIL PROTECTED]>wrote:

> Bandu wrote:
> > Thank you very much, Jifl.
> >
> > The links is reliable using network switch. I can transfer data the
> > whole day without data loss.
> > Ethernet driver is set to Multicast Reception mode.
>
> Maybe your ethernet hardware isn't very intelligent and has to be set into
> promiscuous mode to be able to do multicast. You'd have to look at the
> driver (which isn't part of lwip, so people here are unlikely to be able to
> help much as we won't know anything about the code).
>
> > When tcp_sndbuf become lowering, the data are not going out anymore. It
> > might be retries like you said.
> > Is there any advise how would I debug those retries?
>
> Using a packet sniffer like wireshark, ethereal, tcpdump.
>
> Jifl
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-- 
Bandu
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