On Wed, 30 Mar 2005, Nikhil Bhargava wrote:

> hi Alan,
> 
> Thanks for the information. I have one problem regarding USB modem device 
> driver. 
> I am using DSL as layer 1 technology nad ATM as layer 2. I create PPP 
> connections over Vc and 
> send traffic over these ppp connections on a single DSL line.
> 
> Now when i send a ping packet of 35k and above, there is no reponse coming 
> from server although 
> my packets do reach at server. But when i am sending a ping packet of lesser 
> value replies come.
> 
> Hence i am thinking that some where my splitting of user data packets in usb 
> is causing problem. 
> I am using a packet size of 64k and number of frames as 10 and sending it on 
> ISO pipe.

You need to be a lot more careful about how you use words.  Is the 
"packet" you talk about a DSL packet, an ATM packet, a PPP packet, a USB 
packet, or some other sort?  Likewise for "frame".

> Further is their some kind of bandwidth checking here? I am struck up atthis 
> point and cant think 
> of what could be its cause

There is bandwidth checking, although it's often turned off.  Any errors 
should show up in your system log.

If you want help for this, why don't you ask the maintainer of the USB 
modem driver?

Alan Stern



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