Error messages during booting

[RG <giorgetti@bancaimi.it>]

During booting kernel 2.2.17 on my SPARC Ultra5
I see these error messages:

1-Configuring network interfaces: /etc/network/interfaces: Function not implemented
ifup: couldn't read interfaces file "/etc/network/interfaces"

2-Unimplemented SPARC system call 155
Unimplemented SPARC system call 44

Could anybody help me to understand them?

With regard to the first message the file
/etc/network/interfaces
exists and it is consistent (with all adresses and so on).
Due to this failure after the boot 
I have to run manually the commands
ifconfig
route
and the the network is OK.

Thank you in advance.

Roberto Giorgetti
Milan -Italy