Extreme Networks Summit X150 Series Hardware Installation Manual page 201

If you configure an alternate stacking port on a switch that has native stacking ports, the native stacking
port becomes inactive and cannot be used. When a data port becomes an alternate stacking port, it can
no longer operate as a data port.
When you connect distant nodes using alternate stacking ports, be sure to run the cables over physically
different pathways to reduce the probability a cut occurring to both links.
See Table 64 for the ports that are available on each switch model that supports this feature. For each
switch model, the column labeled Alternate Stacking Port 1 shows the switch port that replaces native
stacking port 1, and Alternate Stacking Port 2 lists the switch port that replaces native stacking port 2.
Switch models that are not listed in the table do not support the SummitStack-V feature.
NOTE
The SummitStack-V feature is supported only on switches that are running ExtremeXOS 12.5.1 (or later).
Table 64: Alternate Stacking Ports
Switch Model
Summit X440-24t-10G
Summit X440-24p-10G
Summit X440-24x-10G
Summit X440-48t-10G
Summit X440-48p-10G
Summit X450a-24t
Summit X450a-24tDC
Summit X450a-24x
Summit X450a-24xDC
Summit X450a-24p
Summit X450e-24t
Summit X450a-48t
Summit X450a- 48tDC
Summit X450e-48p
Summit X460-24t
Summit X460-24x
Summit X460-24p
Summit X460-48t
Summit X460-48p
Summit X460-48x
Summit Family Switches Hardware Installation Guide
Type or location of Native
Stacking Ports
None (has only data ports)
NOTE: Ports 25 and 26 are not available as data ports when the alternate stacking
ports are used.
None (has only data ports)
NOTE: Ports 49 and 50 are not available as data ports when the alternate stacking
ports are used.
Fixed (rear panel)
Fixed (rear panel)
SummitStack module
SummitStack-V80 module
SummitStack module
SummitStack-V80 module
SummitStack module
SummitStack-V80 module
Using the SummitStack-V Feature
Alternate Alternate
Stacking Stacking
Port 1 Port 2
25 26
49 50
25 26
49 50
S1 (29) S2 (30)
S1 (53) S2 (54)
S1 (49) S2 (50)
Location of
Alternate Stacking
Ports
Front panel
Front panel
XGM2-2xf option
card
XGM2-2xn option
card
XGM2-2sf option
card
XGM2-2bt option
card
XGM2-2xf option
card
XGM2-2xn option
card
XGM2-2sf option
card
XGM2-2bt option
card
XGM3-2sf option
card
XGM3-2sf option
card
XGM3-2sf option
card
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