Table 25: X690 Front Panel Port LEDs (continued)
Location Speed Color/State Meaning
Ports 57-72 100Gb/40Gb
(no partition)
Steady white Link OK
Blinking white Port transmitting or receiving
O No link, or port disabled
50Gb/25Gb/10Gb
(partitioned)
Steady green Link OK
Blinking green Port transmitting or receiving
O No link, or port disabled
ExtremeSwitching X770 Series Switches
The X770 series switches have 32 front-panel Ethernet ports that can provide 40-gigabit Ethernet
connectivity using installable QSFP+ optical modules. The ports can operate in 40-gigabit mode, or
with appropriate optical modules can be partitioned into 10-gigabit data lanes. Both native stacking and
alternate stacking are supported using the front panel-ports.
For details on port data capacity and numbering, see Summit X770-32q Switch Ports and Slots on page
82.
The X770 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.
Each base model is available with either front-to-back or back-to-front cooling. There is no operational
dierence between these switch versions.
A serial console port on the front panel of the X770-32q series switch allows you to connect a terminal
and perform local management. An Ethernet management port can be used to connect the system to a
parallel management network for administration. Alternatively, you can use an Ethernet cable to
connect this port directly to a laptop to view and locally manage the switch configuration. The Ethernet
management port supports 10/100/1000 Mbps speeds. There is also a USB port.
X770 switches oer Boundary Clock (BC), Transparent Clock (TC), and Ordinary Clock (OC) for
synchronizing phase and frequency and allowing the network and the connected devices to be
synchronized over Ethernet connections. Precision is +-2 nanoseconds (ns) with time accurancy +50 to
-65 ns.
Switch cooling is provided by five hot-swappable fan modules providing N+1 redundancy. Fan modules
are available in two dierent models that direct the airflow either from front to back or from back to
front. All five installed fan modules must be of the same model, so that they all direct the airflow in the
same direction.
Note
Ensure that all fan module slots are filled when the switch is powered on. Fan modules can be
hot-swapped after power has been turned on.
ExtremeSwitching Switches
ExtremeSwitching and Summit Switches: Hardware Installation Guide 81
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