S Lafredo> When I boot and tried to configure de0 and tlp0 w/no luck. 

S Lafredo> There is something very simple that we are missing on these PB which is
S Lafredo> stopping them from working correctly.

I have overlooked the important information relating the Ethernet i/f
of PB3400c.

http://mail-index.netbsd.org/port-macppc/2000/10/02/0001.html
>        de0 at pci0 dev 13 function 0
>        de0: interrupting at irq 27
>        de0: Asante 21041 [10Mb/s] pass 2.1
>        de0: address 00:00:94:78:67:f3

http://mail-index.netbsd.org/port-macppc/2000/10/04/0005.html
>>       Could you try 'options        TLP_MATCH_21041' to see if the newer
>>       'tlp' driver handles your card better than the 'de' driver.

> Somebody else suggested that off list, so I tried it.  It doesn't
> work either, and I get this repeating error:

> tlp0: filter setup and transmit timeout

Could you try not having 'autoselect' word on /etc/ifconfig.de0 ?
say, for example,
inet 192.168.1.1 netmask 0xffffff00 media 10Base-T
or just
192.168.1.1 netmask 0xffffff00 media 10Base-T

I don't believe the case matters on argument of media.

---
(Makoto Fujiwara)
http://www.ki.nu/software/NetBSD/iBook2/
http://www.ki.nu/software/namazu/tutorial/