Re: [lwip-users] pbuf pool size / mss size in low memory environment and routing to slow link

[Marco Jakobs]

Hi Kieran,

the 36 pbufs with 256 bytes each and 1200 byte MSS did not work ;-)

Is there a recommendation of the relation between pbuf size and MSS? I did not find anything about this is the documentation ...

Marco



Kieran Mansley schrieb:

On Thu, 2009-11-19 at 13:15 -0800, fepgmbh wrote:
  

First of all, 6 pbufs seems not to be very much, and as i understood
they
can be chained together, i changed this to 36 pbufs with 256 bytes
each -
noticing that now the TCP connections won't work with the 1200 byte
MSS.
    

I wonder if your driver can handle that case correctly?  It has to know
to split the received packet across pbufs.  A naive driver might ignore
pbuf chains (on send as well as receive).

Kieran



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