Version 2.1.92 -> 2.1.101 Ethernet

Richard B. Johnson (root@chaos.analogic.com)
Mon, 18 May 1998 17:53:31 -0400 (EDT)

It seems though something is strange about Linux's Ethernet Protocol.
I just got hooked up to a 3COM SuperStack(r) II Switch 3300. It
works okay for all the machines except Linux machines!

If I ping a Linux machine with a packet length of the default (64 bytes?),
it works okay. As I increase the size up to the normal ~1460 bytes,
nothing gets through! The problems start at a packet size of about
400 bytes. Tcpdump on the source machines show packets being transmitted,
Tcpdump on the destination machine shows no packets received.

If I use SunOs's ping the packets get through, regardless of the length,
and they are answered properly by the Linux machines. The problem occurs
when a Linux machine attempts to send. Its packets are rejected by
3COM

Needless to say, the throughput is terrible.

Anybody else seen this problem with the new 3COM stuff?

Cheers,
Dick Johnson
***** FILE SYSTEM MODIFIED *****
Penguin : Linux version 2.1.101 on an i586 machine (66.15 BogoMips).
Warning : It's hard to remain at the trailing edge of technology.

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