Enabling or disabling redundant management

There are two modes for management module redundancy—warm standby mode (the default) and Nonstop switching mode. In warm-standby mode, the active management module does not sync continuously with the standby management module. The standby management module boots to a certain point, syncs basic files, and only finishes booting if the active management module fails or you choose to change which module is the active management module. The transition is not seamless or immediate.

In Nonstop switching mode, the standby management module is synced continuously with the active management module so that all features and config files are the same on both management modules. The standby management module is ready to become the active management module. The transition is quick and seamless; switching continues without interruption.

Syntax


[no] redundancy management-module [nonstop-switching]

Allows enabling or disabling of redundant management. The current active module continues to be the active module on boot unless you use the redundancy active-management command to enable redundant behavior.

(Default: Warm-standby redundancy mode)

The nonstop-switching parameter sets the redundancy mode to Nonstop switching.

You are prompted with "All configuration files and software images on the off-line management module will be overwritten with the data from the current active management module. During initial syncing from active to standby management module configuration changes are disallowed. Do you want to continue [y/n]?"

When the nonstop-switching option is not selected, the switch enters warm-standby redundancy mode.

You are prompted with "All configuration files and software images on the off-line management module will be overwritten with the data from the current active management module. Do you want to continue [y/n]?"

The no version of the command disables redundant management. You are prompted with this message: "The other management module may reboot and it will no longer be used for system redundancy, except in the case of a hardware failure of the active management module. Do you want to continue [y/n]?".

Example

The redundancy management-module command in Enabling warm-standby redundancy shows warm-standby redundant management being enabled. The show redundancy command displays "Mgmt Redundancy" as warm-standby redundancy enabled . Management Module 1 (MM1) is the active management module and Management Module 2 (MM2) is the standby management module.

Enabling warm-standby redundancy

The redundancy management-module command in Figure Enabling nonstop-switching redundancy shows Non-stop switching redundant management being enabled. The show redundancy command displays "Mgmt Redundancy" as Nonstop switching enabled . Management Module 1 (MM1) is the standby management module and Management Module 2 (MM2) is the active management module.

Enabling nonstop-switching redundancy

The no version of the redundancy management-module command is used to disable management module redundancy on the switch, as seen in Disabling redundancy. The show redundancy command displays "Mgmt Redundancy" as Nonstop switching disabled . The standby management module in slot MM1 is now offline. The management module in slot MM2 remains the active management module.

NOTE:

Hewlett Packard Enterprise recommends that you leave management module redundancy enabled. If the active management module has a hardware failure, the standby module may take over and may have an old configuration since file synchronization has not occurred when management module redundancy was disabled.

The no redundancy management-module command allows you to shut down a management module that is not functioning correctly without physically removing the module. If you want to remove the module, first perform the shutdown procedure as explained in Hotswapping out the active management module and then remove the module.

Disabling redundancy

The redundancy management-module command shows Nonstop switching redundant management being enabled. The show redundancy command displays “Mgmt Redundancy” as Nonstop switching enabled. Management Module 1 (MM1) is the standby management module and Management Module 2 (MM2) is the active management module.

Example

Enabling non-stop switching redundancy.

switch# redundancy management-module nonstop-switching
All configuration files and software images on the off-line management module
will be overwritten with the data from the current active management module.
During initial syncing from active to standby management module configuration
changes are disallowed. Do you want to continue [y/n]? y
switch# show redundancy
Settings
--------
Mgmt Redundancy : Nonstop switching enabled
Rapid Switchover Stale Timer : 0
Statistics
----------
Failovers : 0
Last Failover :
Slot Module    Description               Status   SW Version    Boot Image
---- ----------------------------------  ------   ----------    ------------
MM1  J9092A Management Module 8200zl     Standby  K.15.01.000x  Primary
MM2  J9092A Management Module 8200zl     Active   K.15.01.000x  Primary
FM1  J9093A Fabric Module 8200zl         Enabled 
FM2  J9093A Fabric Module 8200zl         Enabled 
The no version of the redundancy management-module command is used to disable management module redundancy on the switch, as seen in Figure 7-4. The show redundancy command displays “Mgmt Redundancy” as Nonstop switching disabled. The standby management module in slot MM1 is now offline. The management module in slot MM2 remains the active management module.
NOTE:

Hewlett Packard Enterprise recommends that you leave management module redundancy enabled. If the active management module has a hardware failure, the standby module may take over and may have an old configuration since file synchronization has not occurred when management module redundancy was disabled.

The no redundancy management-module command allows you to shut down a management module that is not functioning correctly without physically removing the module. If you want to remove the module, first perform the shutdown procedure as explained in “Hotswapping Out the Active Management Module” on page 7-25, and then remove the module.

Example

Disabling redundancy:

switch# no redundancy management-module
The other management module may reboot and it will no longer be used for system
redundancy except in the case of a hardware failure of the active management
module. Do you want to continue[y/n]? y
switch# show redundancy
Settings
--------
Mgmt Redundancy : Nonstop switching disabled
Rapid Switchover Stale Timer : 0
Statistics
----------
Failovers : 1
Last Failover : Tue Mar 19 12:42:31 2009
Slot   Module     Description               Status   SW Version   Boot Image
----   ---------  ------------------------  -------  -----------   ------------
MM1    J9092A     Management Module 8200zl  Offline  K.15.01.000x  Primary
MM2    J9092A     Management Module 8200zl  Active   K.15.01.000x  Primary
FM1    J9093A     Fabric Module 8200zl      Enabled
FM2    J9093A     Fabric Module 8200zl      Enabled