- Cisco 1800 Series Integrated Services Router Manual

8-4
Cisco 1800 Series Routers (Modular) Hardware Installation Guide
OL-5876-03
Chapter 8 Troubleshooting Cisco 1800 Series Routers (Modular)
Reading LEDs
– There may be a problem with the card or cable. See the “Cisco One-Year Limited Hardware
Warranty Terms” and the “Obtaining Documentation and Submitting a Service Request”
sections of the “Introduction to Cisco 1800 Series Routers (Modular) Hardware
Documentation” document for warranty and customer service contact information.
Reading LEDs
The LEDs on the router enable you to determine router performance and operation. The System Power
(SYS PWR) LED and the System Activity (SYS ACT) LED are on the front panel; all the other LEDs
are on the back panel.
Ta b l e 8-1 LED Indicators on Cisco 1800 Series Routers
LED Indicator State Meaning
Possible Causes and Corrective
Actions
SYS PWR Off No output is coming from the
internal power supply.
Power is not switched on at the
router.
Power is not available from the
source.
Faulty input power wires or
connections are missing.
Failed power supply in the router. To
replace the internal power supply,
call your Cisco technical support
representative.
Solid green Router is receiving power, and
the internal power supply is
functional.
Normal indication. No action is
required.
Blinking
green
During bootup, router is
booting up normally.
Normal indication. No action is
required.
After bootup, router is
operating in ROM monitor
mode.
See the router rebooting and
ROM monitor information in the
Cisco 1800 series software
configuration documentation.
SYS ACT Off No packet transfers are
occurring.
Interface card connections are not
functional.
Router is not configured properly.
Check configuration, and make
corrections as necessary.
Blinking System is actively transferring
packets and monitoring
internal activity
Normal indication. No action is
required.