Reference v4.1.0 Instruction Manual

Network OS Command Reference 315

53-1003115-01

ha failover

Initiates a failover from the active to the standby management module (MM).

Synopsis ha failover

Operands None

Defaults None

Command Modes Privileged EXEC mode

Description Use this command to force a failover from the active to the standby MM. When the process

completes, the former standby takes over as the active MM. If the active and standby MMs are not

synchronized, the command aborts.

Usage Guidelines With the introduction of Network OS 4.0, failover is no longer disruptive for all Layer 2.

The following summarizes the behavior of the ha failover command under a variety of conditions.

The modes are as follows:

Examples To perform a failover:

switch# ha failover

See Also ha failover, ha enable, ha sync start, ha sync stop, reload, show ha

Mode Definition

FC Fabric Cluster. In FC mode, the data path for nodes is distributed, but the

configuration path is not distributed. Each node maintains its own

configuration database. This command causes a warm recovery.

LC Logical chassis cluster. In LC mode, both the data path and the configuration

path are distributed. This command causes a cold recovery.

Behavior of the ha failover command

HA synchronized HA not synchronized

Active Standby Active Standby

Reboots the active MM. In FC mode, there is a

warm recovery on the

standby MM.

In MC mode there is

always a cold recovery.

Not allowed. Not allowed.