Administrator Guide

Figure 122. Stack-Group on an MXL 10/40GbE Switch
Conguring a Switch Stack
Conguring a switch stack is a four step process.
To congure and bring up a switch stack, follow these steps:
1. Connect the switches to be stacked with 40G direct attach or QSFP bre cables.
2. Congure the stacking ports on each switch.
3. All switches must be booted together.
4. (Optional) Congure management priorities, unit numbers, or logical provisioning for stack units.
Stacking Prerequisites
Before you cable and congure a stack of MXL 10/40GbE switches, review the following prerequisites.
• All MXL 10/40GbE switches in the stack must be powered up with the initial or startup conguration before you attach the
cables.
• All stacked MXL 10/40GbE switches must run the same Dell Networking OS version. The minimum Dell networking OS version
required is 8.3.16.0. To check the version that a switch is running, use the show version command. To download a Dell
Networking OS version, go to
http://www.dell.com/support/my-support/.
• Stacking is supported only with other MXL 10/40GbE switches. A maximum of six MXL 10/40GbE switches is supported in a
single stack. You cannot stack the MXL 10/40GbE switch with the M IO Aggregator or another type of switch.
• A maximum of four stack groups (40GbE ports) is supported on a stacked MXL 10/40GbE switch.
• Interconnect the stack units by following the instructions in Cabling Stacked Switches.
• When you create stack ports on an MXL Switch, all ports must be xed or on the expansion module. Mixing xed and expansion
module ports in order to stack is not supported.
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Stacking