Yesterday our customer lost internet connectivity on their lease line at about 4:30pm. After about an hour the router was rebooted and internet connectivity was restored. The customer is requesting an RFO (reason for outage).
Upon looking at the cisco logs I get the following:
It can be normal to see the Dead process holding memory. The Dead process is simply a holding area for memory that was allocated by a process that was released and the memory is still being used. A good example of Dead memory usage is when you telnet into a router, make a config change then kill the telnet session. When you initually telnet into the router a Virtual Exec process is created to deal with the telnet session. While telneted in, if you go into config mode and increase the logging buffered to say 10mb then 10mb of memory will be allocated for the log. The allocation happened under the Virtual Exec process (a show mem proc would show Virtual Exec holding 10mb). When the telnet session is killed, the memory allocated by Virtual Exec is still needed, therefore the 10mb is moved to the Dead process and the Virtual Exec process is removed. Now, if the router is rebooted, the 10mb allocated for the Log will now show up under the Init process (Init allocates memory when the router is booting).
Seeing 1mb in Dead is nothing to be concerned about. If you saw 30mb or more then it may warrent a closer look. As far as the router rebooting, a show version will tell you when the last reboot occurred and the reason for it. If it was a crash, you should see the reboot reason be something like "Bus error" or "Segv". A crash should also result in a crashinfo being produced and saved to the flash.
Just contact with your device provider or Cisco and create a TAC CASE with them.
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