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.
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.
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.
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.
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
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.
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