link to the server is down after sometime
 

Hi,
I installed CentoOS in one machine with AMD opetron processor. I am using static DHCP to assign its IP address 192.168.0.100. I can ssh to this machine from other machines. But after several hours, I cannot ssh to that machine anymore. But after I login that machine, run firefox and access internet once, then I can access that machine from other machines.
How can I debug this issue? Is it because after several hours, this machine is hibernating or my router issue?
Best,
Alfred

Sounds like power management. Is apmd running? Read up more about apmd. Another thing to check is your BIOS settings for power management. If you verified that everything looks correct for those two, then it's time to look at the system logs in /var/log and see what's going on.

-twantrd

Hi twantrd,
Thanks for the info. I am new to linux and I could not apmd command in my machine and I also don't have /etc/sysconfig/apmd file. Can you give me more detailed info?
Best,
Alfred

try

chkconfig --list | grep apmd

Hi,
No. I don't have apmd running. The interesting thing is that from that machine (192.168.0.100), I can ping 192.168.0.101. But from 101 machine, I cannot ping 192.168.0.100 when that happens.
-- Alfred