Users Guide

redundancy force-failover
Force the secondary stack unit to become the primary stack unit. You can also use this command to upgrade
the software on one stack unit from the other when the other has been loaded with the upgraded software.
Syntax
redundancy force-failover stack-unit
Parameters
stack-unit Enter the keyword stack-unit then the stack-unit ID number.
Default Not configured.
Command Modes EXEC Privilege
Command History
This guide is platform-specific. For command information about other platforms, see
the relevant Dell Networking OS Command Line Reference Guide.
Version Description
9.10(0.1) Introduced on the S6010-ON and S4048T-ON.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.2(0.0) Introduced on the M I/O Aggregator. This command is
supported in Programmable-Mux (PMUX) mode only.
8.3.19.0 Introduced on the S4820T.
8.3.12.0 Introduced on the S4810.
8.1.1.0 Introduced on the E-Series.
7.5.1.0 Introduced on the C-Series.
7.6.1.0 Introduced on the E-Series.
Usage Information
To provide a hitless or warm upgrade, use this command. 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.
High Availability (HA) 808