Command Line Reference Guide

518 | High Availability (HA)
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Usage
Information
Enabling this command will keep the failed RPM in the failed state. If there are two RPMs in the
system, enabling this command prevents the failed RPM from becoming a working Standby RPM. If
there is only one RPM in the system, the failed RPM will not recover—this will effect the system.
redundancy force-failover
c es
Force the secondary RPM to become primary RPM or or force the backup unit in an S-Series stacking
configuration to become the management unit. This command can also be used to upgrade the software
on one RPM from the other when the other has been loaded with the upgraded software.
Syntax
redundancy force-failover {rpm | stack-unit}
Parameters
Defaults
Not configured.
Command Modes
EXEC Privilege
Command
History
Usage
Information
This command can be used to provide a hitless or warm upgrade. A hitless upgrade means that a
software upgrade does not require a reboot of the line cards. A warm upgrade means that a software
upgrade requires a reset of the line cards. A warm upgrade is possible for major releases and lower,
while a hitless upgrade can only support patch releases.
You load the software upgrade on one RPM and then issue this command with the rpm keyword to
move the software to the other RPM. The system senses the condition and provides a series of prompts
appropriate to that context, as shown in the following example:
Example FTOS#redundancy force-failover rpm
Peer RPM's SW version is different but HA compatible.
Failover can be done by warm or hitless upgrade.
All linecards will be reset during warm upgrade.
Specify hitless upgrade or warm upgrade [confirm hitless/warm]:hitless
Proceed with warm upgrade [confirm yes/no]:
Version 8.1.1.0 Introduced on E-Series ExaScale
Version 7.6.1.0 Introduced on E-Series
rpm Enter the keyword rpm to force the secondary RPM to become the primary RPM.
stack-unit Enter the keyword stack-unit to force the backup unit in the stack to become the
management unit (S-Series only).
Note: Using this command will reboot the stack-unit.
Version 8.1.1.0 Introduced on E-Series ExaScale
Version 7.5.1.0 Introduced on C-Series
Version 7.6.1.0 Introduced on E-Series
Note: On C-Series, this command could affect traffic (even during hot-failover) since the switch fabric
present on the RPM is taken down during the failover.
Note: On the S-Series, using this command will reboot the stack-unit.