X450-G2 Stacking
The stacking-support option is enabled by default for X450-G2 switches. For more information, see
Enabling and Disabling the Stacking-Support Option on page 149.
The stacking port selection option, which allows you to choose between native and alternate ports, is
enabled by default for X450-G2 switches. For more information, see Selecting Native and Alternate
Stacking Ports on page 162.
Table 63: Stacking Methods for X450-G2 Switches
Stacking Method Speed per Link (HDX) Cable Type and Lengths
SummitStack-V84
Uses rear panel dedicated 21 Gb stacking ports
Available only in stacks of X450-G2 switches
running the same version of ExtremeXOS
21 Gbps 0.5m, 1.0m, 3.0m. 5.0m
QSFP+ passive copper cable
SummitStack-V
(Front panel 10G models)
10 Gbps 0.5m–40km
SFP+
Native Stacking for X450-G2 Switches
For native stacking with the X450-G2 switch, use the two fixed 21 Gb QSFP+ stacking ports on the rear
of the switch, as shown in Figure 120. These stacking ports provide SummitStack-V84 stacking and can
be stacked natively only with other X450-G2 switches.
SummitStack-V84 connections require direct-connect QSFP+ copper cables.
The X450-G2 is the only Extreme Networks switch that supports SummitStack-V84.
Figure 120: X450-G2 Switch: Native Stacking Ports
1 = 21 Gb QSFP+ stacking ports
2 = Grounding lug
Alternate Stacking for X450-G2 Switches
Alternate stacking (SummitStack-V) is supported for the X450-G2 10GE4 switch models, as
summarized in Table 64. Use the front-panel 10G ports for alternate stacking.
Building Stacks
ExtremeSwitching and Summit Switches: Hardware Installation Guide 152
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