eto without IP on boot

[Bernd Kloss <B_Kloss@web.de>]

Etch
2.6.17-2-k7
different realtek, 3COM, onboards

Hello,

I am having problems with clients on boot. 
Client is booting, but not finding yp-server
This occurs on different clients, sometimes I have to reboot a client a few times and then it works. This behaviour is not reproducable. No rules. 

ifconfig shows description for lo, nothing for eth0.
On
ifconfig eth0 192.168.136.XYZ
/etc/init.d/nis start
everything is working normally.

Has anyone a clue?

Thanks and greetings
Bernd Kloss
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