Brocade Multi-Service IronWare Switching Configuration Guide (Supporting R05.6.00) - Manual (Page 82)

52 Multi-Service IronWare Switching Configuration Guide
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How management module redundancy works
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• An Auxiliary flash card installed in the active management module
When the replacement module boots, the system compares the flash code and system-config files
on the standby module to the files on the active module. If differences exist, the files on the
standby module are synchronized to match those on the active module.
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 normally. When the new module is installed, it assumes the role of
standby, and boots from a source specified for the active module, for example:
• The flash memory on the active management module
• An Auxiliary flash card installed in the active management module
The system compares the flash code and system-config files on the replacement module to the
files on the active module. If differences exist, the files on the standby module are synchronized to
match those on the active module.
Switchover implications
When a switchover occurs between the active and standby modules, the following areas may be
affected:
• Management sessions
• Syslog and SNMP traps
• BGP Peer Notification – Described in the Multi-Service IronWare Routing Configuration Guide
The following sections explain the implications for these areas.
Management sessions
You can establish management sessions using the management port on the active management
module. If a switchover occurs, the management port on the original active module shuts down
and all open CLI, Web Management Interface, and Brocade Network Advisor sessions with that port
close. You can open new sessions with the new active module, if this module has the same
management port connections.
For example, if you were accessing the Web Management Interface through a PC connected to the
original active management port, you can open a new session if a PC is connected to the new
active management port. Open a new session using the same IP address you used before the
switchover. (If a switchover occurs, the IP address you configured on the original active module is
automatically assumed by the new active module.)
Syslog and SNMP traps
When a switchover occurs, the Brocade system sends a Syslog message to the local Syslog buffer
and to the Syslog server, if you have configured the system to use one. The system also sends an
SNMP trap to the receiver, if one is configured.
When system power is restored, or the system is reset normally, a cold start message and trap are
sent. However, if the system is reset as the result of switchover to the standby management
module, the system sends a warm start message and trap.