Installation Guide

Stacking Considerations for Each Switch Model
The following topics list basic information and special considerations pertaining to stacking for each of
the ExtremeSwitching switch models.
• Summit X250e and X450a/e Stacking on page 255
• Summit X440 Stacking on page 256
• X440-G2 Stacking on page 257
• X450-G2 Stacking on page 258
• Summit X460 Stacking on page 260
• X460-G2 Stacking on page 261
• ExtremeSwitching X465 Stacking on page 265
• Summit X480 Stacking on page 265
• X590 Stacking on page 267
• X620 Stacking on page 267
• Summit X650 Stacking on page 268
• Summit X670 Stacking on page 268
• X670-G2 Stacking on page 270
• X690 Stacking on page 272
• ExtremeSwitching X695 Stacking on page 273
• Summit X770 Stacking on page 273
• X870 Stacking on page 275
Summit X250e and X450a/e Stacking
Many switches, including most Summit X250e, X450a, and X450e series models, have standard
stacking ports built in. The stacking ports are found on the rear of the switch.
Use any standard SummitStack stacking cables to connect the stacking ports.
The stacking-support option is disabled by default for Summit X250e, X450a, and X450e switches. For
more information, see Enabling and Disabling the Stacking-Support Option on page 252.
The stacking port selection option, which allows you to choose between native and alternate ports, is
enabled by default for X450a and X450e switches. For more information, see Selecting Native and
Alternate Stacking Ports on page 275.
To use alternate stacking on a Summit X450a or X450e switch, you must install an XGM2-2xf,
XGM2-2xn, XGM2-2sf, or XGM2-2bt port option card to add 10-Gbps ports to the switch.
Building Stacks
Stacking Considerations for Each Switch Model
Summit Family Hardware Installation Guide 255