Re: Possible TCP Problem with RH6.2 talking to Solaris2.6/2.7 (f

From: Anton Ivanov (aivanov@eu.level3.net)
Date: Thu May 04 2000 - 07:20:42 EST


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It is rumored that on 04-May-2000 shane wrote:
> OK to answer all the questions:
>
>> (snip)
>> > The Sun used a larger window (64K versus 32K).
>>
>> Check that Networking options ... IP: Allow large windows is enabled in
>> your kernel build. This could be related to case 2?
>
> I will check again, but I am sure that it is.
>
>>
>> Using a larger receive window on the Linux end could help, anyway. Any
>> ideas WHY those packets were dropped, BTW?
>
> Funny thing, I tried changing the window sizes on the sparc to be 32K,
> It actually performed worse in general tests with freeBSD and linux.
> But I can do some further tests, will let ya know later today.

Check to make sure that you are not recieving any errs on the linux side. I had
absolutely the same picture that finally appeared to be bad cabling. In btw,
the eepro driver at least in some 2.2.x kernels erroneously reports some errors
as "collisions".

[snip]

- ----------------------------------
Anton R. Ivanov
IP Engineer Level3 Communications
RIPE: ARI2-RIPE E-Mail: Anton Ivanov <aivanov@eu.level3.net>
@*** Clarke's Laws (No 3 of 3) ***
      Any sufficiently advanced technology is indistinguishable from magic.

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