Developers Guide

Version Description
8.1.1.0 Introduced on the E-Series.
7.6.1.0 Introduced on the E-Series
Usage
Information
Enabling this command keeps 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 does not recover and affects the system.
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
9.10(0.0) Introduced on the S3148.
9.8(2.0) Introduced on the S3100 series.
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.
High Availability (HA) 577