In short: the driver sends out packets, but it can't receive. 

I'm trying to install netbsd/sparc64 on an old netra t1.  Aside from the 
problem with ifconfig that I reported earlier, I noticed that the driver
itself doesn't quite work.  It sends out packets (I can see them with
tcpdump), but it does not appear to be receiving; it does not respond to
pings, and does not even receive the arp replies to the arps it sends out.

openbsd-current has the same problem with the driver (but not with ifconfig).

/ji