Troubleshooting
Using Watchdog Timers
Watchdog timers are used to reboot the system if something goes wrong. When working properly,
a failover pair will continue functioning because the backup system can take over when the
primary system is rebooted.
Types of Watchdogs
CPU reset
This is essentially a "power cycling" of the CPU. It's a hardware operation, so the
state of the software doesn't matter. It will always succeed.
reboot
As opposed to a CPU-reset, a reboot may not succeed - if the operating system
hangs, for example.
panic
A reboot that is caused by a kernel exception, or by Non-maskable Interrupt
(NMI). This default behavior can also be changed to cause the system to enter
the kernel debugger instead of rebooting.
Non-maskable Interrupt (NMI)
In this scenario, the operating system stops performing when it receives such a
signal. For Equalizer systems, an NMI causes a panic.
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Copyright © 2014 Coyote Point Systems, A Subsidiary of Fortinet, Inc.
Содержание Equalizer GX Series
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