Installation Guide

Table 118 summarizes alternate stacking support for X450a and X450e switches.
Table 118: Alternate Stacking Ports for X450a and X450e Switches
Switch Model Type or location of Native
Stacking Ports
Alternate Stacking
Ports
Location of Alternate
Stacking Ports
X450a-24t
X450a-24tDC
X450a-24x
X450a-24xDC
X450e-24t
X450e-24p
Fixed (rear panel) 25,26 XGM2-2xf or
XGM2-2xn or
XGM2-2sf or
XGM2-2bt
X450a-48t
X450a-48tDC
X450e-48t
X450e-48p
Fixed (rear panel) 49,50 XGM2-2xf or
XGM2-2xn or
XGM2-2sf or
XGM2-2bt
Summit X440 Stacking
The stacking-support option is enabled by default for Summit X440 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
disabled by default for X440 switches. For more information, see Selecting Native and Alternate
Stacking Ports on page 275.
Table 119: Stacking Methods for X440 Switches
Stacking Method Speed per Link (HDX) Cable Type and Lengths
SummitStack
(Front panel for 8t and 8p models. Rear panel
for all other models except 10G models; 10G
models do not have native stacking ports)
10 Gbps 0.5m, 1.5m, 3.0m
20 Gb Stacking Cable
SummitStack-V
(Front panel 10G models)
10 Gbps 0.5m–40km
SFP+
Many switches, including most Summit X440 series models, have standard stacking ports built in.
Except in the case of the X440 8-port models, the stacking ports are found on the rear of the switch, as
shown in the following illustration.
Figure 205: Stacking Ports on Rear of Switch (Summit X440-24t Shown)
1 = AC power input connectors
3 = Redundant power connector
Stacking Considerations for Each Switch Model Building Stacks
256 Summit Family Hardware Installation Guide