Cisco SGE2000P Administration Guide - Page 34

• If each part of the stack has a Stack Master (for example, one contains the original Stack Master, and one contains the Backup Master), and are operating as two separate stacks, both Stack Masters contain the same configuration and use the same IP address. NOTE: If both Stack Masters use the same IP Address, problems can occur on the network, because users cannot connect to one of the stacks through its IP address. Neither the Stack Master Unit or the Backup Master Unit Remains in the Group This scenario is the same as that of a failed Stack Master where no Backup Master is available. The following concepts apply: • Units whose ID numbers are 3 through 8 in this part of the original stack will not renumber themselves, and will remain shut down until a master-enabled unit is connected and begins to operate as the Stack Master. The Master Discovery process discovers that the Stack Master has failed. • In this group, the units lose connection with the Stack Master. Since they began as a running stack and none of them are in factory default mode, renumbering does not occur, and even a reset of the units will not affect unit ID assignment, because units can be renumbered only by a Stack Master. • No unit ID changes are performed in each one of the two groups. NOTE: None of the units in either group will renumber themselves. Merging Two Stacks To merge two working stacks and create one stack, first decide if you will merge the stacks while the incoming units are powered off during insertion, or if both stacks will be running when merged. 29 Linksys One Ready Communications Solution 3 Chapter 3: Connecting the Switch Stack Troubleshooting and Maintenance Chapter