Administrator Guide

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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 EMC

Networking OS Command Line Reference Guide.

Version Description

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.

redundancy protocol

Enable hitless protocols.

Syntax

redundancy protocol {lacp | xstp}

To disable a hitless protocol, use the no redundancy protocol {lacp | xstp} command.

Parameters

lacp Enter the keyword lacp to make LACP hitless.

xstp Enter the keyword xstp to invoke hitless STP (all STP modes — MSTP, PVST+, RSTP,

and STP).

Default Disabled

Command Modes CONFIGURATION