Deployment Guide

Conguring and Bringing Up a Stack

After you attach the 40G QSFP or direct attach cables in a stack of Aggregators, 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 Aggregator as described in Accessing the CLI.

2 Log on to the CLI and enter Global Conguration mode.

Password: *****

Dell> enable

Dell# congure

3 Congure the Aggregator to operate in stacking mode.

CONFIGURATION mode

stack-unit 0 iom-mode stack

4 Repeat Steps 1 to 3 on the second Aggregator in the stack.

5 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 conguration of each stacked

switch is stored in the running conguration 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.

Adding a Stack Unit

You can add a new unit to an existing stack both when the unit has no stacking ports (stack groups) congured and when the unit already

has stacking ports congured. If the units to be added to the stack have been previously used, they are assigned the smallest available unit

ID in the stack.

To add a standalone Aggregator to a stack, follow these steps:

1 Power on the switch.

2 Attach QSFP or direct attach cables to connect 40GbE ports on the switch to one or more switches in the stack.

3 Log on to the CLI and enter global conguration mode.

Password: *****

Dell> enable

Dell# congure

4 Congure the Aggregator to operate in stacking mode.

CONFIGURATION mode

Stacking

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