988 | Stackingw w w . d e l l . c o m | s u p p o r t . d e l l . c o mIf a standalone switch already has stack groups configured.Merge Two S-Series StacksYou may merge two stacks while they are powered and online. To merge two stacks, connect one stack tothe other using user port cables from the front end user port.• FTOS selects a master stack manager from the two existing managers based on the priority of thestack.• FTOS resets all the units in the losing stack; they all become stack members.• If there is no unit numbering conflict, the stack members retain their previous unit numbers.Otherwise, the stack manager assigns new unit numbers, based on the order that they come online.• The stack manager overwrites the startup and running config on the losing stack members with its ownto synchronize the configuration on the new stack members.5 Configure the ports on the added switch forstacking, where:stack-unit 0 defines the default ID unit-numberin the initial configuration of a switch.stack-group group-number configures a port forstacking.stack-unit 0 stack-groupgroup-numberCONFIGURATION6 Save the stacking configuration on the ports. write memory EXEC Privilege7 Reload the switch. FTOS automatically assigns anumber to the new unit and adds it as memberswitch in the stack. The new unit synchronizes itsrunning and startup configurations with the stack.reload EXEC PrivilegeStep Task Command Syntax Command Mode8 Attach cables to connect the ports already configured as stack groups on the switch to one or more switches in thestack.9 FTOS automatically assigns a number to the new unit and adds it as member switch in the stack. The new unitsynchronizes its running and startup configurations with the stack.FTOS Behavior: When you add a new switch to a stack:• If the new unit has been configured with a stack number that is already assigned to a stack member,the stack avoids a numbering conflict by assigning the new switch the first available stack number.• If the stack has been provisioned for the stack number that is assigned to the new unit, thepre-configured provisioning must match the switch type. If there is a conflict between the provisionedswitch type and the new unit, a mismatch error message is displayed.Step Task Command Syntax Command Mode
