Operation Manual – VRRP-HAH3C S7500 Series Ethernet Switches Chapter 2 HA Configuration2-1Chapter 2 HA ConfigurationWhen configuring HA, go to these sections for information you are interested in:z HA Overviewz HA Configurationz Displaying HA2.1 HA OverviewS7506R supports high availability (HA) feature. This feature is to achieve a highavailability of the system and to recover the system quickly in the event of failures so asto shorten the mean time between failure (MTBF).The functions of HA are mainly implemented by the application running on SRPU board.An S7506R switch has two SRPUs, which are working in the master/slave mode: oneboard works in master mode as the master board, the other works in slave mode as abackup board. If the master/slave system detects a fault in the master board, amaster/slave switchover will be performed automatically. The slave board will try toconnect with and control the system bus while the original master board will try todisconnect from the bus. Thus, the master/slave switchover of the active system iscompleted, and at the same time the original master board is reset to function as theslave board. Therefore, even if the master board fails, the slave board can also take itsrole to ensure the normal operation of the S7506R switch.S7506R supports hot swap of SRPUs. The hot swap of master boards will causemaster/slave switchover.S7506R supports manually master/slave switchover. You can change the current boardstate manually by executing commands.Caution:The HA feature of the S7506R switches can realize the software upgrade of the twoSRPUs with at least one SRPU being active. However, the SRPU and the LPU of theEthernet switches must be identical in their software version, otherwise they cannotwork normally. Therefore, during the upgrade, you are recommended to restart thewhole switch after the SRPU executes the boot boot-loader command to ensurenormal operating of the switch.
