Re: [Madwifi-users] NETDEV WATCHDOG: ath0: transmit timed out

[Michael S. <rin...@a-...>]

On Fri, Oct 10, 2003 at 03:29:13PM -0700, silas bennett wrote:
> 
> hello Amit,
> 
> try:
> 
> ifconfig ath0 mtu 1200
> 
> this has worked for some.

Any idea why this should be necessary?

WLAN should handle the normal ethernet MTU and even larger frames (IIRC, the
maximum frame size is ~2300 bytes), so there should be no reason at all to
set a lower MTU. 

At least on my notebook, I get good performance (~2.5MB/s) without any
netdev watchdog timeouts. I am using 802.11a with a LANCOM access point.

Larger packets may get corrupted more often due to noise on the transmission
channel, however, if that really is the problem, then using fragmentation in
the driver would be the better approach. However, I think that a *lot* of
noise would be necessary - I guess we would have to not get an ACK on all
retransmissions of the packet, which seems quite odd.

cu
Michael