Command Line Reference Guide

542 | High Availability (HA)
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Command
History
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 e
Force the secondary RPM to become primary RPM or force an SFM (on an E-Series chassis only) to
become the standby SFM. 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 | sfm [slot-number]}
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 and SFMs. 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:
Version 8.3.1.0
Added the
all option
Version 8.1.1.0 Introduced on E-Series ExaScale
Version 7.6.1.0 Introduced on E-Series
Warning: When you use this command, if the first VLT peer RPM has crashed, the
backup VLT channel is still alive and the second VLT peer will not know that the first
VLT is in crash state. As a result, the second VLT peer assumes that the first VLT
peer is still up.
rpm
Enter the keyword rpm to force the secondary RPM to become the primary RPM.
sfm slot-number EtherScale Only—Enter the keyword sfm followed by the SFM slot number.
Range: 0 to 8.
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.