2002-03-15 10:54:22

by Ian Carr-de Avelon

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Subject: 3com switch with 2.4.17

I have a 486 which runs as a router, and I want to change to 2.4. After
boot and working out which order the ether cards are now found in, everything
is OK except I can't ping PCs connected to a 3com switch, which connects
to a ne2k-pci RTL-8029 card in the 486 via a hub. PCs directly connected to
the hub ping OK.
Does this ring any bells as to why this could be OK with a 2.2.13 kernel
but broken with 2.4.17?
My troubleshooting is normally a) check it electricaly (obviously OK as
it has worked with 2.2.13 for months) then check it pings.
How can I look further into this? eg looking at ethernet packets instead
of TCP/IP packets?
Yours
Ian


2002-03-15 14:11:11

by Ian Carr-de Avelon

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Subject: Re: 3com switch with 2.4.17

Sebastian Heidl <[email protected]> wrote:
>On Fri, Mar 15, 2002 at 11:54:38AM +0100, Ian Carr-de Avelon wrote:
>> I have a 486 which runs as a router, and I want to change to 2.4. After
>> boot and working out which order the ether cards are now found in, everything
>> is OK except I can't ping PCs connected to a 3com switch, which connects
>> to a ne2k-pci RTL-8029 card in the 486 via a hub. PCs directly connected to
>> the hub ping OK.
>> Does this ring any bells as to why this could be OK with a 2.2.13 kernel
>> but broken with 2.4.17?
>
>might be related to ECN (just a guess). Have a look at this:
>http://www.kernel.org/pub/linux/docs/lkml/#s14-2
Well that fixed it. Many thanks I'd never have found that.
Yours
Ian