BigIron RX Series Configuration Guide 2753-1002253-01How management module redundancy works 3• The active management module’s flash memory.• A PCMCIA flash card inserted in one of the PCMCIA slots in the active management module’sfront panel.After the replacement module boots, the active module compares the standby module’s flash codeand system-config file to its own. If differences exist, the active module synchronizes the standbymodule’s flash code and system-config file with its own.Removal and replacement of a standby management moduleYou can remove a standby management module without causing a switchover to occur. The activemodule continues to function as is. Communication between the active module and the removedmodule stops until the new module is installed in the BigIron RX Series devices. After the newmodule is installed, it assumes the role of standby module. The module boots from the sourcespecified for the active module. The active management modules can boot from the followingsources:• The active management module’s flash memory.• A PCMCIA flash card inserted in one of the PCMCIA slots in the active management module’sfront panel.After the module boots, the active module compares the standby module’s flash code andsystem-config file to its own. If differences exist, the active module synchronizes the standbymodule’s flash code and system-config file with its own.Switchover implicationsAfter the role of the active management module switches from one module to another, you must beaware of implications that affect the following areas:• Management sessions• Syslog and SNMP traps• MAC addressesThe following sections explain the implications for these areas.Management sessionsYou can establish management sessions with the active management module’s management port.If a switchover occurs, the management port on the original active module shuts down and all openCLI, Web management interface, and IronView Network Manager sessions with that port close. Youcan open new sessions with the new active module, provided that the new active module has thesame management port connections. (For example, if you were accessing the Web managementinterface through a PC connected to the original active module’s management port, you can open anew session if a PC is connected to the new active module’s management port.)In the scenario described above, you can open a new session using the same IP address you wereusing before the switchover. (You configure an IP address for the active module only; if a switchoveroccurs, the IP address is used by the new active module.)
