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Configuring Shelf-Controller Redundancy (APX 8000)
Obtaining status information about redundant shelf controllers
APX 8000/MAX TNT/DSLTNT Physical Interface Configuration Guide Preliminary May 9, 2000 2-9
the default security level is reactivated. In addition, a system reset can cause a WAN line to
temporarily be shut down due to momentary loss of signaling or framing information. After a
reset, the unit runs power-on self-tests (POST).
The reset -r command resets the secondary controller or both controllers. The reset -f
command resets the controller where the command is invoked. When the primary controller is
reset, the secondary controller automatically takes over control and becomes primary.
Following is an example of what you enter to reset both controllers:
admin> reset -r b
Clearing NVRAM
The nvram command clears NVRAM and resets one or both APX 8000 redundant shelf
controllers.
The nvram -r command clears NVRAM and resets the secondary controller or both
controllers. The -f, -t, -u, and -c command options apply to the controller where the
command is invoked. When the nvram command is performed on the primary controller and
NVRAM is cleared and the controller reset, the secondary controller automatically takes over
control and becomes primary.
Enter the following command to clear NVRAM and reset the secondary shelf controller:
admin> nvram-r s
Enter the following command to clear NVRAM and reboot both shelf controllers:
admin> nvram-r b
Obtaining status information about redundant shelf
controllers
You can use the following methods to obtain information about the redundant shelf controllers:
• The command-line interface uptime command indicates the length of time the
controllers have been operational.
• The command-line interface show command provides status information about the
redundant shelf controllers.
• The Trap profile parameter Secondary-Controller-State-Change-Enabled allows a trap to
be sent to the NavisAccess™ manager whenever the secondary controller goes in or out of
service.
Following are descriptions of these methods.
Viewing controller up time
The uptime command reports the length of time the primary controller has been operational.
It also indicates the time elapsed since the secondary controller started communications with
the primary. If a controller reboots or if communication between the two controllers is