Installation guide

4–Diagnostics and Troubleshooting
Recovering a Router
4-4 ISR651103-00 C
Over-Temperature Blink Pattern
The system fault LED generates a five-blink pattern (once per second) followed by
a two-second pause when the router is in an over-temperature condition. For
example, this occurs when the air temperature inside the router is over the failure
temperature of 70
°C (158°F).
If the system alert LED shows the over-temperature blink pattern, follow these
steps:
1. Inspect the chassis air vents. Are the intake and exhaust vents clear?
 Yes—Continue with Step 2.
 No—Remove any debris from the fan intake and exhaust if necessary.
If the condition remains, continue with Step 2.
2. Consider the ambient air temperature near the router and clearance around
the router. Make necessary corrections. If the condition remains:
a. Open a command line window and log on to the router.
b. Enter the shutdown command.
c. Power down the router.
d. Contact your authorized maintenance provider.
Recovering a Router
You may have to recover a router for one of the following reasons:
 The password was changed and has been forgotten.
 The router’s management IP address is unknown.
To recover the router’s password, reset the password to the default by using the
maintenance button (see “Maintenance Button” on page 1-4).
You can recover the router’s IP address using either of the following methods:
 Connect to the serial console port (see“Serial Port” on page 1-9), and then
use the CLI set mgmt command reconfigure the management port (see
the iSR6152 Router CLI User's Guide).
 Use the maintenance button to reset the management port’s IP to the factory
default of 10.0.0.1 (see “Maintenance Button” on page 1-4).