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4 – Managing Switches
Using Fault Tolerance
59234-03 A 4-35
A
Figure 4-15. Add License key Dialog
5. Enter the license key in the Key field.
6. Click the Get Description button to display the upgrade description. If the
installation of the feature key will require a switch reset, the user is warned.
7. Click the Add Key button to upgrade the switch. Allow a minute or two for
the upgrade to complete.
4.12
Using Fault Tolerance
The Fault Tolerance license key enables the capability of switching control from
one CPU to another either manually (switchover) or automatically (failover). When
certain CPU-related errors occur, the CPU failover process occurs automatically.
That is, control is automatically passed from one CPU to another.
To manually invoke the CPU switchover process, do the following:
1. Open the faceplate display.
2. Open the Switch menu, select Secondary CPU.
3. Select CPU Switchover, and follow the prompts.
The blade should be reset after a failover to the other CPU. To reset the blade
selected in the faceplate display, open the Switch menu, select Secondary CPU,
select Reset Blade, and select Reset or Hard Reset.
NOTE: The CPU Switchover option requires the Fault Tolerance license key.
Refer to ”Upgrading a Switch with a License Key” on page 4-34 for
more information.
To maintain Ethernet connectivity with Fault Tolerance, it is necessary
to have Ethernet connections to both CPUs.