Device driver problem

[Michael Davison]

I am writing a device driver for the Western Digital 8003e ethernet card 
on an IBM RT running AOS4.3 (the BSD4.3 port) and its coming along well but I 
have run into a problem.  When the new interface (wd0) is ifconfiged 
and the existing interface (un0) is ifconfiged down all TCP traffic dies,
and the only UDP traffic (NFS and NTP) is to/from machines listed in the
"/etc/hosts" file.  ICMP traffic is unaffected - in fact ping to/from this
machine works great.  I have traced this problem in the telnet code to the
"connect" call - this guy fails with a timeout error.  Any suggestions???

Thanks again.

Mike