Reference Guide

High Availability (HA) | 569
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:
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]:
Example
(force-failover
sfm)
FTOS#redundancy force-failover sfm 0
%TSM-6-SFM_FAILOVER: Standby switch to SFM 8
Standby switch to SFM 0
FTOS#
redundancy primary
c e
Set an RPM as the primary RPM.
Syntax
redundancy primary
[rpm0 | rpm1]
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 8.3.19.0 Introduced on the S4820T.
Version 8.3.12.0 Introduced on the S4810.
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.