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Configuring System Information
69
ProSafe M5300 Switch
• Single IP address management through a web browser, the CLI, or SNMP.
• Master-slave configuration.
• The master retains configuration for entire stack.
• Automatic detection of new members, with synchronization of firmware (upgrade or
downgrade as needed).
• Configuration updates across the stack through a single operation.
• Automatic master fail-over. Fully resilient stack with chain and ring topology.
• Hot swapping (insertion and removal) of stack members.
Firmware Synchronization and Upgrade
All stack members must run the same software version to ensure compatibility within the
stack. By default, if a unit is added to the stack and its software version is not the same as the
stack master, that unit is not allowed to join the stack. You can enable the Stack Firmware
Auto Upgrade feature, which will automatically synchronize the firmware version on the new
unit with the version running on the stack master. The synchronization operation may result in
either upgrade or downgrade of firmware on the mismatched stack member.
Upgrading the firmware on a stack of switches is the same as upgrading the firmware on a
single switch. After you download a new image by using the File Download page or SCC, the
downloaded image is distributed to all the connected units of the stack.
Note: It is recommended to set the active image for all stack members the
same as the active image of the stack master. In other words, if
image1 is the active image on the stack master, all units should have
image1 as the active image. For information about configuring the
active image, see Dual Image Configuration on page 289.
Configuration Maintenance
The stack master stores and maintains the saved and running configuration files for the
switch stack. The configuration files include the system-level settings for the switch stack and
the interface-level settings for all stack members. Each stack member retains a copy of the
saved file for backup purposes. If the master is removed from the stack or becomes
unavailable, another member will be elected master, and will then run from that saved
configuration.
The switch master copies its running configuration to the stack member configured as the
standby unit whenever it changes (subject to some restrictions to reduce overhead). This
enables the standby unit to take over the stack operation with minimal interruption if the stack
master becomes unavailable. The running-config synchronization also occurs when the
running configuration is auto-saved on the stack master or when the standby unit changes.