Q:

Server went to sleep mode

I've setup a new Dell Poweredge R410 server with debian squeeze. If the server is idle for a longer time it seems to go to sleep mode. If I ping the server, it doesn't answer for 10-20 seconds and then comes up again. In in /var/log/messages I can see:
Oct 13 12:54:56 localhost kernel: [74420.949520] device eth0 entered promiscuous mode
Oct 13 12:55:49 localhost kernel: [74473.200155] device eth0 left promiscuous mode

There is nothing configured in /etc/acpi that the server should go to sleep mode if there is no activity for a longer time. 
Does anyone know what else can cause the issue?  

A:

The problem was caused by the bnx2 network driver. After upgrading from version 2.0.2 to 2.0.23b the problem is solved.

