Configuration manual

Configuring and Bringing Up a Stack

After you attach the 40G QSFP or direct attach cables in a stack of MXL 10/40GbE Switches, to bring up

the stack, follow these steps.

NOTE: The procedure uses command examples for the stacking topology shown previously in this

chapter.

1. Set up a connection to the CLI on an MXL 10/40GbE Switch as described in Accessing the CLI.

2. Log on to the CLI and enter Global Configuration mode.

Password: *****

Dell> enable

Dell# configure

3. Configure a 40GbE port for stacking mode.

CONFIGURATION mode

stack-unit unit-number stack-group group-number

The valid values are from 0 to 5.

The default value is 0.

• stack-unit <unit-number>: is the unit-number of the member stack unit.

• stack-group group-number is the number of stacked port on unit. The valid values are from 0

to 1.

4. Save the stacking configuration on the 40GbE ports.

EXEC PRIVILEGE mode

write memory

5. Repeat Steps 1 to 4 on each MXL 10/40GbE switch in the stack.

6. Log on to the CLI and reboot each switch, one after another, in as short a time as possible.

EXEC PRIVILEGE mode

reload

NOTE: If the stacked switches all reboot at approximately the same time, the switch with the highest

MAC address is automatically elected as the master switch. The switch with the next highest MAC

address is elected as standby. As each switch joins the stack, it is assigned the lowest available

stack-unit number from 0 to 5. The default configuration of each stacked switch is stored in the

running configuration of the stack. The stack-unit ID numbers are retained after future stack

reloads.

To verify the stack-unit number assigned to each switch in the stack, use the show system brief

command.

To configure stacked switches so that stacking roles are determined by preset priorities, use the stack-

unit priority command (refer to Assigning a Priority to Stacked Switches).

Stacking

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