Cisco Nexus 9236C User manual
Overview
•Overview, on page 1
Overview
The Cisco Nexus 9236C switch (N9K-C9236C) is a 1 rack unit (RU) switch that has the following ports:
• 36 100-Gigabit QSFP28 interface ports that support 100-, 50-, 40-, 25-, 10- and 1-Gigabit speeds. You
can use the following adapters with these ports:
• CVR-2QSFP28-8SFP which provides eight SFP/SFP+/SFP28 ports for each vertical pair of ports
on the switch. The top four SFP/SFP+/SFP28 ports connect to the upper QSFP28 port of the switch
pair, and the bottom SFP/SFP+/SFP28 ports connect to the lower QSFP28 port.
• CVR-QSFP-SFP10G which provides an SFP/SFP+ port for one QSFP/QSFP28 port on the switch.
These ports also support breakout cables with four 10-Gigabit SFP+ transceivers
(such as the QSFP-4X10G-AOCxM and QSFP-4SFP10G-CUxM cables).
Note
• 1 100/1000 management port
• 1 console port
• 2 software-defined ports
• 1 USB port for saving or loading switch configurations
The chassis for this switch includes the following user-replaceable components:
• Fan modules (four) with the following airflow choices:
• Port-side intake fan module with burgundy coloring (NXA-FAN-30CFM-B)
• Port-side exhaust fan module with blue coloring (NXA-FAN-30CFM-F)
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Table 1: Fan Speeds for this Switch
Port-Side Exhaust
Fan Speed %
Port-Side Intake
Fan Speed %
100%50%Typical/Minimum
100%100%Maximum
Note
• Power supply modules (two—one for operations and one for redundancy [n+1]) with the following
choices:
• 650-W port-side intake AC power supply with burgundy coloring (NXA-PAC-650W-PI)
• 650-W port-side exhaust AC power supply with blue coloring (NXA-PAC-650W-PE)
•1200-W HVAC/HVDC dual-direction airflow power supply with white coloring (N9K-PUV-1200W)
• 930-W port-side intake DC power supply with green coloring (UCSC-PSU-930WDC)
• 930-W port-side exhaust DC power supply with gray coloring (UCS-PSU-6332-DC)
Both power supplies should be the same type. Do not mix AC, DC, or
HVAC/HVDC power supplies.
Note
All fan modules and power supplies must use the same airflow direction during
operations. If you are using the 1200-W HVAC/HVDC power supplies, those
power supplies automatically use the same airflow direction as used by the other
modules in the switch.
Note
The following figure shows the switch features on the port side of the chassis.
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Overview
36 100-Gigabit
QSFP+/QSFP28 ports
4Beacon (BCN), Status
(STS), and Environment
(ENV) LEDs
1
Screw holes (6) for
attaching a mounting
bracket
5Lane link status LEDs for
4x10-Gigabit port
configuration (1 LED lit
to show the lane being
checked or all LEDs off
when all 4 lanes are being
checked)
2
Grounding pad6Lane shift button3
To determine which transceivers, adapters, and cables are supported by this switch, see the Cisco Transceiver
Modules Compatibility Information document.
The following figure shows the switch features on the power supply side of the chassis.
Console port (1)6Power supply modules (1
or 2) (AC power supplies
shown) with slots
numbered 1 (left) and 2
(right)
1
USB port (1)7Fan modules (4) with slots
numbered from 1 (left) to
4 (right)
2
Management port (RJ-45)8L1 port (software defined)3
Screw holes (6) for
attaching a mounting
bracket
9L2 port (software defined)4
Grounding pad10Beacon (BCN) and Status
(STS) LEDs
5
Depending on whether you plan to position the ports in a hot or cold aisle, you can order the fan and power
supply modules with port-side intake or port-side exhaust airflow. For port-side intake airflow, the fan and
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Overview
AC power supply modules have burgundy coloring (DC power supply modules have green coloring). For
port-side exhaust airflow, the fan and AC power supplies have blue coloring (DC power supply modules have
gray coloring). You can also order the 1200-W HVAC/HVDC power supply which has dual-direction airflow
with white coloring. Dual-direction airflow modules automatically use the airflow direction of the other
modules installed in the switch.
The fan and power supply modules are field replaceable and you can replace one fan module or one power
supply module during operations so long as the other modules are installed and operating. If you have only
one power supply installed, you can install the replacement power supply in the open slot before removing
the original power supply.
All of the fan and power supply modules must have the same direction of airflow. Otherwise, the switch can
overheat and shut down. If you are installing a dual-direction power supply, that module will automatically
use the same airflow direction as the other modules in the switch.
Note
If the switch has port-side intake airflow (burgundy coloring for fan modules), you must locate the ports in
the cold aisle. If the switch has port-side exhaust airflow (blue coloring for fan modules), you must locate the
ports in the hot aisle. If you locate the air intake in a hot aisle, the switch can overheat and shut down.
Caution
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Overview
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