ACT Led lights Off and Cause the whole network DOWN

[wilfredodedase]

Hi Everyone !

Sorry to ask but I am new to Cisco.

I recently had an issue regarding on our router that ACT and SYS LED turn off and cause the network down. Can someone explain to me the cause and solution to resolve this issue ? 

Cause after it happen I just restart the router and works and after I search the problem stated " No packet transfers are occurring" "The router CPU is not operating."

Please I really need you help

Regards

Wilfredo Dedase

[Peter Paluch]

Wilfredo,

It is quite possible that the router experienced a hardware malfunction. Unfortunately, such a problem is usually solved only by having the router replaced.

What I suggest is to take the router out of the network and bring it to a silent room, then power it up and check whether the fan is rotating and whether any LEDs come up. If the router remains completely dark and silent, its power supply might be shot.

If the router does seem to come up at least partially, I would suggest connecting a console cable to it and with a PC running PuTTY or HyperTerminal checking whether there are any messages logged on the console (9600 bits per second, 8 data bits, no parity, 1 stop bit, no flow control). Where to go from there depends on what you see on the console connection.

What is the exact router type, anyway?

Best regards,
Peter

[wilfredodedase]

Hi peter,

router is 3900 series, We did what u have suggested, After we reboot the router everything works well,  Im just wondering why out of the blue our router hang and ACT LED turn off.

Regards

Wilfredo Dedase