On Thursday, 02/14/2002 at 12:17 EST, "Scully, William" <[EMAIL PROTECTED]> wrote: > Restating what I think you mentioned earlier, it seems that TCP/IP on VM is > limited to a 32K buffer. I've looked in the TCP/IP for VM doc and I don't > see any records which control the size of that buffer. Have I misunderstood > you or misread the doc?
Bill, the VM doc doesn't discuss how to write a CTC device driver and the 32K I/O buffer is an artifact of driver implementation. You would have to read the VM TCP/IP CTC driver source code to figure it out. All CTC driver implementations must assume that a 32K chunk of data could be received, containing multiple packets of MTU-size bytes and CTC frame headers. There is no buffer size negotiation. I would think that the Linux CTC driver would default to 32K, but I don't know. Regards, Alan IBM Senior Software Engineer z/VM Development, Endicott, NY Phone 607.752.6027 fax 607.752.1497 t/l 852
