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Configuring high availability, Using ha commands – Brocade Network OS Administrator’s Guide v4.1.1 User Manual

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Configuring high availability

The following sections provide you with information on configuring High Availability (HA) support on
Brocade switches.

Using HA commands

A variety of high-availability (HA) commands are available on the switch in privileged EXEC mode.

show ha displays the management module status.

switch# show ha

Local (M2): Active, Cold Recovered

Remote (M1): Standby, Healthy

HA enabled, Heartbeat Up, HA State synchronized

ha failover forces the active management module to fail over. The standby management module will

take over as the active management module.

reload system reboots the entire chassis. This command is supported only on the active

management module. This command is not supported on the standby management module. Both
management modules must be in sync for the HA reboot operation to succeed. In logical chassis
cluster mode, this command can be issued from the principal node to reset one remote node or all of
the remote nodes by specifying either the individual rbridge-id or "all".

ha sync start enables HA state synchronization after an ha sync stop command has been invoked.
show ha all-partitions displays details for all line cards and the MM HA state.

NOTE
For additional HA commands and related commands, refer to the Network OS Command Reference

Understanding expected behaviors for reload and failover

The following tables identify expected behaviors that result from controlled and uncontrolled reload and
failover conditions.

Expected behaviors for controlled reload and failover

TABLE 7

Command syntax Behavior in fabric cluster and logical chassis cluster

reload

Cold failover to standby management module (MM).

NOTE
When MMs are out of sync, the reload command does not work. Use the reload system
command to reboot the switch in this case.

reload standby

Reboot the standby MM.

reload system

Reboot both MMs. MMs will retain the HA roles.

ha failover

Warm failover to standby MM.

Configuring high availability

Network OS Administrator’s Guide

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