Information Technology Reference
In-Depth Information
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Passed
00:00:24: %LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
00:00:24: %LINK-3-UPDOWN: Interface FastEthernet0/1, changed state to up
00:00:24: %LINK-3-UPDOWN: Interface Serial0/0, changed state to down
00:00:25: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state
to up
00:00:25: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state
to down
00:00:25: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to down
00:00:58: %LINK-5-CHANGED: Interface BRI0/0, changed state to administratively down
00:00:59: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0/0, changed state to down
00:00:59: %IP-5-WEBINST_KILL: Terminating DNS process
00:01:00: %LINK-5-CHANGED: Interface Serial0/0, changed state to administratively down
00:01:00: %LINK-5-CHANGED: Interface FastEthernet0/0, changed state to administratively
down
00:01:00: %LINK-5-CHANGED: Interface FastEthernet0/1, changed state to administratively
down
Troubleshooting the Power and Cooling Systems
Check the following items to help isolate the problem:
When the power switch is in the on position (|) and the power LED is on, make sure that the fan is
operating. If not, check the fan.
If the router shuts down after being on a short time, check the environmental conditions. The router
might be overheating, resulting in a thermal-induced shutdown. Verify that the chassis intake and
exhaust vents are clear. The operating temperature for the router is 32 Fto 104 F(0 Cto 40 C).If the
router fails to boot but the power LED is on, check the power supply.
If the router constantly or intermittently reboots, there might be a problem with either the processor
or the software, or a DRAM single in-line memory module (SIMM) might be installed incorrectly.
Cisco 3600 Startup
Introduction
This section explains how to recover a Cisco 3600 router from either a corrupted or missing ios image.
To gain access to the rommon command line interpreter, hit the break key during the first 15 seconds
after the router has been powered on. From the rommon> prompt you may then use the xmodem
command to transfer an ios image to the router via the console interface of the router.
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