discarded oversize frames

[David Malone]

On Fri, Feb 25, 2005 at 10:00:34AM -0500, Jonathan Pater wrote:
> fxp0: discard oversize frame (ether type 800 flags 3 len 1515 > max
> 1514)
> 
> Is this something I should be
> worried about, or is it indicative of something else faulty in the local
> network setup?

This message is produced if the ethernet card receives a packet
that is bigger than permitted by the MTU + the size of the ethernet
header. For normal ethernet this means that packets should be <=
1514 bytes.

So, there are three ways to eliminate the the message:

	1) Find the machine sending oversize packets and stop it.
	2) Change the MTU on your interface using ifconfig, this
	will only work if the other machines on the network expect
	larget frames.
	3) You could edit /usr/src/sys/net/if_ethersubr.c and remove
	the code that prints this error and then recompile your
	kernel.

David.