Brocade BigIron RX Series Configuration Guide - Manual (Page 99)

BigIron RX Series Configuration Guide 21
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Management module redundancy configuration
2
Once booted, the redundant management module keeps up-to-date copies of the active module's
running configuration. Layer 2 protocols such as STP, RSTP, MRP, and VSRP are run concurrently on
both the active and standby management modules. Upon the failover of the active management
module, the standby module takes over as the active management module and picks up where the
active module left off, without interrupting any Layer 2 traffic.
The interface modules are not reset, as they are with the previous cold-restart redundancy feature.
The interface modules continue to forward traffic while the standby management module takes
over operation of the system. The new now-active management module receives updates from the
interface modules and sends verification information to the interface modules to ensure that they
are synchronized.
If the new active management module becomes out-of-sync with an interface module, information
on the interface module can be overwritten in some cases which can cause an interruption of
traffic forwarding. Layer 3 hitless failover is not supported in this release. Consequently, a failover
will result in a re-synchronization of Layer 3 data structures
Management module redundancy configuration
Configuring management module redundancy consists of performing one optional task (changing
the default active slot). The section explains how to perform this task.
Changing the default active slot
By default, the BigIron RX Series system considers the module installed in slot M1 to be the active
management module. If desired, you can change the default active slot to M2.
The active-management command determines which management module will become active
after a power cycle. By default, the top or left mgmt module will become active after power cycle.
This information is stored in the device backplane eeprom, and not in the configuration file. This is
a device specific configuration.
To change the default active device slot to M2, enter the following commands.
BigIron RX(config)# redundancy
BigIron RX(config-redundancy)# active-management mgmt-2
Syntax: active-management <mgt-module>
The <mgt-module> parameter specifies the management module, which can be mgmt-1 or
mgmt-2.
NOTE
This configuration has no effect on the "reload" and "boot ..." commands. It only applies to the power
cycle when both MPs are in the device.
Managing management module redundancy
The BigIron RX Series Switch allows you to perform the following management tasks related to
management module redundancy.
• Perform immediate synchronization of files.