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1-23
Cisco Nexus 3000 Series Hardware Installation Guide
OL-25338-04
Chapter 1 Overview of the Cisco Nexus 3000 Series Switches
Cisco Nexus 3172PQ Switch
Ports for the Cisco Nexus 3172PQ Switch
The switch chassis includes the following ports:
• 72 x 10 Gigabit Ethernet ports (48 SFP+ and 6 QSFP+)
–
48 SFP ports support 1 and 10 Gigabit Ethernet
–
6 QSFP ports support 4 x 10 Gigabit Ethernet or 40 Gigabit Ethernet each
• Management, console, and USB flash-memory ports
You use Small Form factor Pluggable Plus (SFP+) and QSFP transceivers with copper or optical cables
to connect the switch to the servers. The management port enables you to manage switch operations. The
console port enables you to initially configure the switch and to perform troubleshooting operations.
TheUSB port enables you to save or load switch configurations.
Power Supply for the Cisco Nexus 3172PQ Switch
The Cisco Nexus 3000 Series switch has two slots for power supplies that are initially installed with one
or two AC or DC power supplies that have forward or reverse airflow for their cooling. The switch
requires only one power supply for its operations, but you can include a second one for redundancy.
To determine which part number to use when ordering replacement power supplies, see Table 1-15.
If the chassis has two power supplies, you can hot swap one of the power supplies during operations. If
the chassis has only one power supply, you can install the new power supply in the open slot, turn on that
power supply, and then remove the original power supply during operations.
Caution You can order replacement power supplies with front-to-back airflow or back-to-front airflow. Be sure
to order the same direction of airflow as is used with the switch. If there is a black stripe across the front
of the fan trays and power supplies, the switch is running back-to-front airflow and you must order power
supplies with back-to-front airflow. If there is no black stripe across the front of these modules, the
switch is running front-to-back airflow and you must order replacement modules with front-to-back
airflow.
Ta b l e 1-15 Cisco Nexus 3172PQ Power Supply Part Numbers
Power Supply Part
Number
Power Source and
Airflow Direction
Description
N2200-PAC-400W AC
Forward
N2K/3K 400W AC Power Supply, Forward airflow
(port side exhaust)
N2200-PAC-400W-B AC
Reverse
N2K/3K 400W AC Power Supply, Reversed airflow
(port side intake)
N2200-PDC-400W DC
Forward
N2K/3K 400W DC Power Supply, Forward airflow
(port side exhaust)
N3K-PDC-350W-B DC
Reverse
N3K Series 350W DC Power Supply, Reversed airflow
(port side intake)