Dell Force10 MXL Blade MXL 10/40GbE Switch IO Module Configuration Guide - Page 560

www.dell.com | support.dell.com Step 4 5 6 Task Command Syntax Configure a 40GbE port for stacking, where: stack-unit 0 defines the default ID unit-number in the initial configuration of a switch. stack-group group-number configures a 40GbE port for stacking. Base-module ports are stack groups 0 and 1; 40GbE ports on a FlexIO module in slot 0 are stack groups 2 and 3 and in slot 1 are stack groups 4 and 5 (Figure 31-5). stack-unit 0 stack-group group-number Save the stacking configuration on the 40GbE ports. write memory Reload the switch. FTOS automatically assigns a number to the new unit and adds it as member switch in the stack. The new unit synchronizes its running and startup configurations with the stack. reload Command Mode CONFIGURATION EXEC Privilege EXEC Privilege If a standalone switch already has stack groups configured, continue with these steps: Step 7 8 Task Command Syntax Command Mode Attach QSFP or direct attach cables to connect the 40GbE ports already configured as stack groups on the switch to one or more switches in the stack. Power on the switch. FTOS automatically assigns a number to the new unit and adds it as member switch in the stack. The new unit synchronizes 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 mem- ber, 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, the pre-configured provisioning must match the switch type. If there is a conflict between the provisioned switch type and the new unit, a mismatch error message is displayed. Merging Two Stacks You can merge two MXL 10/40GbE Switch stacks while they are powered and online. To merge two stacks, connect one stack to the other with 40G QSFP or direct attach cables. After you connect the stacking cables, a merge of the two stacks is performed: • FTOS selects a master switch for the merged stack from the existing masters in the two stacks. To ensure that one of the two master switches wins the master election in the merged stack, use the stack-unit priority command to configure the highest priority for the unit (refer to Assigning a Priority to Stacked Switches). • All the units in the losing stack go for a reboot and then merge with the winning stack that has the stack master. 558 | Stacking