In some email I received from Ben Elliston, sie wrote:
> I'm using the iy (Intel EtherExpress PRO/10) driver.  After periods of heavy
> traffic through this interface, the interface stops responding--ping, the
> works.  If I `ifconfig iy0 down' and then reconfigure the interface, it's
> fine again.
> 
> Is this a known problem?  Should I just get a different model of net card?

Familiar problem to me, at least.  That was with NetBSD-1.4.  What version
of NetBSD are you using ?

Darren