Table 28: 2-digit Stack Number Indicator (continued)
Label or Type Color/State Meaning
Stacking Ports 10G mode
(Alternate stacking) ports
103 and 104
Steady green Link OK
Blinking green Activity
O No link or port disabled
ExtremeSwitching X870 Series Switches
The X870 series switch is a 100 Gb switch suited for large datacenter applications. Front-panel Ethernet
ports can provide 100-gigabit Ethernet connectivity using installable QSFP28 and QSFP+ optical
modules. The ports can operate in 40- or 100-gigabit mode and can be partitioned into 10-, 25-, and 50-
gigabit data lanes. (See Partitioning X870 Switch Ports into Data Lanes on page 85 for details and an
example.)
The X870 provides latency less than 600 nanoseconds and supports cut-through switching to help
optimize high frequency trading applications as well as latency sensitive cluster computing.
Native stacking with other X870 series switches is supported using the front panel-ports.
The X870 series includes the following base models:
•
ExtremeSwitching X870-32c Switch Ports and Slots on page 87
•
ExtremeSwitching X870-96x-8c Switch Ports and Slots on page 88
X870 series switches require ExtremeXOS version 22.2.1 or later.
Partitioning X870 Switch Ports into Data Lanes
Front-panel ports on X870 series switches can be configured for either 100-gigabit or 40-gigabit mode,
and each port can be partitioned into data lanes through the use of split cables. This yields a total of up
to 128 ports.
Port numbers are assigned depending on whether the physical ports are partitioned into data lanes. To
illustrate, Figure 92 shows a portion of the switch's front panel along with the port-number assignments
for physical ports P1 through P8.
ExtremeSwitching Switches
ExtremeSwitching and Summit Switches: Hardware Installation Guide 85
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