Bill
 
Which version of lwIP are you using? I think there has been a change in
CVS recently that fits your problem (remote mss not used for sending).
Could you try to use the v1.3.0 release candidate?
 
Simon
 


________________________________

        Von:
[EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]
Im Auftrag von Bill Auerbach
        Gesendet: Donnerstag, 31. Januar 2008 16:54
        An: 'Mailing list for lwIP users'
        Betreff: [lwip-users] Jumbo frame questions
        
        

        Hello,

         

        I made changes to support Jumbo Frames (9k).  Besides the driver
changes, I used TCP_MSS of 9000.  All is good with about 100Mb/S speed
increase.

         

        I dropped back to a connection that doesn't support jumbo frames
and I have connection problems because of TCP_MSS not being e.g. 1512.

         

        I cannot use something like: #define TCP_MSS (UseJumbo ? 9000 :
1512).

         

        How can I adjust TCP_MSS when I'm on a "normal" network?  Or...
what else do I need to look at for supporting Jumbo frames
transparently?  Shouldn't my lwIP side see the other end's MSS on
connection and downsize accordingly?

         

        If this is a basic networking or TCP question and off topic,
please let me know where to find what I need.

         

        Thank you,

         

        Bill Auerbach

         

         

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