Reference Guide

20
High Availability (HA)
In Dell Networking OS, High Availability (HA) is a collection of features that synchronize switch
configuration to minimize recovery time in the event of a stack-unit failure. High Availability features are
supported only on stacked S5000 switches; they are not supported on a standalone S5000 switch.
In general, a protocol is defined as “hitless” in the context of stack-unit failure. A protocol is defined as
hitless if a stack-unit failover has no impact on the protocol.
You must specifically enable some protocols for HA. Some protocols are only hitless if related protocols
are also enabled as hitless (for example, the redundancy protocol command).
redundancy disable-auto-reboot
Prevent the system from auto-rebooting the failed stack-unit member(s).
S5000
Syntax
redundancy disable-auto-reboot [stack-unit unit-number |
members]
To return to the default, use the no redundancy disable-auto-reboot
stack-unit
command.
Parameters
stack-unit unit-
number
Enter the keyword stack-unit followed by number to
disable auto-reboot of the failed stack-unit. The range is 0 to
11.
members Enter the keyword members to disable auto-reboot of all
members of the stack-unit.
Default Disabled (that is, the failed module is automatically rebooted).
Command
Modes
CONFIGURATION
Command
History
Version 9.0(1.3) Introduced on the S5000.
Usage
Information
Enabling this command keeps the failed stack-unit in the failed state. If there are
two or more stack-unit members in the system, enabling this command prevents
the failed stack-unit from becoming a standby unit. If there is only one stack-unit
in the system, the failed unit does not recover and affects the system.
High Availability (HA)
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