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.

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.

Table 1. 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.

Stacking Ports on Rear of Switch (Summit X440-24t Shown)

1 = AC power input connectors	3 = Redundant power connector
2 = Stacking ports

Use any standard SummitStack stacking cables to connect the stacking ports.

Alternate stacking is supported for most X440 switches, as summarized in Alternate Stacking Ports for X440 Switches.

Table 2. Alternate Stacking Ports for X440 Switches

Switch Model	Type or location of Native Stacking Ports	Alternate Stacking Ports	Location of Alternate Stacking Ports
X440-24t-10G X440-24x-10G X440-24p-10G	None	25,26	Front panel
X440-48t-10G X440-48p-10G	None	49,50	Front panel