[eepro100] mtu > 1500 packet ?

Donald Becker becker@scyld.com
Wed, 15 Nov 2000 16:41:06 -0500 (EST)

On Thu, 16 Nov 2000 sysadm@CHS.twbbs.org wrote:

> >> Does anybody know that can eepro100 (intel 8255x) NIC handle packet
> >> size > 1500?
> >
> >Only by disabling all packet length checking.
> >Doing this makes the system vulnerable.  If you get a larger packet than
> >you were expecting you might overwrite random parts of memory.
>     thank you for your response..but i wonder whether intel 82557
> NIC and intel Bussiness 10/100 switch support large frames?

Very few switches support large frames.
I only know of the Alteon gigabit Ethernet switches.

> i have
> visited the www.intel.com and www.scyld.com, but there are no articles
> saying about it.

There are an infinite number of possible standards violations... why would I
write about them?

>     btw, i can't find the length checking codes after calling dev_queue_xmit.
> Can you show me that?

It's in the hardware.

Donald Becker				becker@scyld.com
Scyld Computing Corporation		http://www.scyld.com
410 Severn Ave. Suite 210		Second Generation Beowulf Clusters
Annapolis MD 21403			410-990-9993