Alcatel OS6855-24 User Guide - Page 172

Slot Numbering Managing OmniSwitch 6855 Series Stacks Because slot 6 is the top-most switch in the stack, it is reassigned the slot 1 (i.e., primary) position; because slot 7 is located immediately below slot 6, it is reassigned the slot 2 (i.e., secondary) position, etc. Note that the modules were not reloaded one-by-one, even though the stack set slot command provides optional syntax for doing so. Instead, new slot number information is first saved to each boot.slot.cfg file across the stack. The reboot is saved for last in order to avoid duplicate slot numbers within the stack, which would cause unwanted pass-though mode conditions (see page 7-13). When the stack comes up following the reboot, the manually-configured slot numbers display as follows: Slot 1 - Primary Slot 2 - Secondary Slot 3 - Idle Slot 4 - Idle Slot 5 - Idle Slot 6 - Idle Slot 7 - Idle Slot 8 - Idle The stack set slot command can also be used to manually correct duplicate saved slot assignments within the stack topology. Refer to pages 7-13 through 7-15 for detailed information. Note: The diagram above is for example purposes only, currently only four OS6855-U24X switches can be stacked at a time. Reverting to the Dynamic Slot Numbering Model To clear the boot.slot.cfg files from the stack's /flash directories, use the stack clear slot command on all modules and then reboot the stack. For example: -> stack clear slot 1 -> stack clear slot 2 -> stack clear slot 3 -> stack clear slot 4 -> stack clear slot 5 -> stack clear slot 6 -> stack clear slot 7 -> stack clear slot 8 -> reload all The commands shown above clear the saved slot information from all modules in a stacked configuration and then reboot the stack. Because the system software no longer has preassigned slot information to read during the boot process, the stack uses the dynamic slot number assignment method described on page 7-21. page 7-24 OmniSwitch 6855 Series Hardware Users Guide September 2011