Brocade Communications Systems FastIron SX 1600, Hardware Installation Manual

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Brocade FastIron X Series Chassis Hardware Installation Guide 105
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How Management module redundancy works
5
Removal and replacement of a management module
For information about how to remove and replace a management module, refer to “Replacing a
management module” on page 118.
This section explains how management module redundancy is affected when you remove and
replace an active or standby management module.
Removal and replacement of an active management module
If you remove the active management module, the standby module automatically assumes the role
of the active module. After you insert a replacement module in the slot from which the original
active module was removed, the replacement module becomes the standby module. The module
boots from the source specified for the active module. The active management module boots from
the active management module’s flash memory.
NOTE
Before removing the active management module, Brocade recommends that you first issue the
command switch-over-active-role. For details, refer to
“Manually switching over to the standby
management module” on page 108.
After the replacement module boots, the active module compares the standby module’s flash code
and system-config file to its own. If differences exist, the active module synchronizes the standby
module’s flash code and system-config file with its own.
Removal and replacement of a standby management module
You can remove a standby management module without causing a switchover to occur. The active
module continues to function as is. Communication between the active module and the removed
module stops until the new module is installed in the chassis. After the new module is installed, it
assumes the role of standby module. The module boots from the source specified for the active
module. The active management modules boot from the active management module’s flash
memory.
After the module boots, the active module compares the standby module’s flash code and
system-config file to its own. If differences exist, the active module synchronizes the standby
module’s flash code and system-config file with its own.
Switchover implications
After the role of the active management module switches from one module to another, you must be
aware of implications that affect the following areas:
•
Management sessions
•
Syslog and SNMP traps
•
MAC addresses
The following sections explain the implications for these areas.