Reference Guide

Stacking | 219

Cabling Procedure

The following cabling procedure uses the stacking topology in Figure 16-15. To connect the cabling:

1. Connect a 40GbE base port on the first Aggregator to a 40GbE base port on another Aggregator in the

same chassis.

2. Connect a 40GbE base port on the second Aggregator to a 40GbE port on the first Aggregator.

The resulting ring topology allows the entire stack to function as a single switch with resilient fail-over

capabilities. If you do not connect the last switch to the first switch (Step 4), the stack operates in a daisy

chain topology with less resiliency. Any failure in a non-edge stack unit causes a split stack.

Accessing the CLI

To configure a stack, you must access the stack master in one of the following ways:

• For remote out-of-band management (OOB), enter the OOB management interface IP address into a

Telnet or secure shell (SSH) client and log in to the switch using the user ID and password to access

the CLI.

• For local management, use the attached console connection to the master switch to log in to the CLI.

Console access to the stack CLI is available on the master only.

• For remote in-band management from a network management station, enter the virtual local area

network (VLAN) IP address of the management port and log in to the switch to access the CLI.

Configuring 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 in Figure 16-15.

Step Task Command Syntax Command Mode

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 Configuration mode.

Password: *****

FTOS> enable

FTOS# configure

---

3 Configure the Aggregator to operate in stacking mode.

stack-unit 0 iom-mode stack

CONFIGURATION

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.

reload

EXEC PRIVILEGE