Cisco Nexus 3400-S Hardware Installation Guide

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Book Title

Cisco Nexus 3400-S Hardware Installation Guide

Chapter Title

Overview

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Updated:
January 25, 2023

Chapter: Overview

Overview

Overview of the Cisco Nexus 3408-S Switch

The Cisco Nexus 3408-S (N3K-C3408-S) is a 4 rack unit (RU) 8-slot modular chassis switch, which is configurable with up to 128 100-Gigabit QSFP28 ports or 32 400-Gigabit ports. This switch offers two management ports, one console port, and one USB port. This switch supports port-side intake airflow. The switch requires one AC, DC, or HVAC/HVDC power supply for operation, but it can have a second power supply for redundancy.

The following figure shows the fan-side chassis features that you use when installing the chassis or replacing its modules.

Figure 1. Fan-Side View of the Cisco Nexus 3408-S Chassis

1

Fan modules (3)

2

Grounding pad

3

Power supply

4

Cisco Nexus NXB-CPU-FRU central processing unit (CPU) that is inside the chassis, behind the fan modules.

The following figure shows the port-side chassis features that you use when installing the chassis or replacing its modules.

Figure 2. Port-Side View of the Cisco Nexus 3408-S Chassis

1

Cisco Nexus 3408-S modular chassis

2

Cisco Nexus NXM-X4D line-card expansion module (LEM) (up to 8)

3

Cisco Nexus NXM-X16C line-card expansion module (LEM) (up to 8)

4

Expansion module blank (NXA-XBLANK)

5

Beacon (BCN) and Status (STS) LEDs

6

Management port (RJ-45)

7

Console port (RS-232)

8

Management port (SFP)

9

USB port (1)

The following figure shows the side chassis features that you use when installing the chassis.

Figure 3. Side View of the Cisco Nexus 3408-S Chassis

1

Screw holes for mounting brackets

Overview of the Cisco Nexus 3432D-S Switch

The Cisco Nexus 3432D-S (N3K-C3432D-S) is a 1 rack unit (RU) switch with 32 QSFP-DD+ ports, 2 SFP+ ports, 2 management ports, 1 console port, and 1 USB port. This switch supports both port-side exhaust and port-side intake airflow schemes. The switch requires one AC power supply for operation, but it can have a second power supply for redundancy.


Note

If you have low-power input (100-120 VAC) and if the system is close to capacity, both power supplies need to be operational. Do not rely on redundant power to run the system. Redundant power applies to high-power input (200-240 VAC or 200-320 VDC).


Note

In the event that only one power supply is operating in an active system and a second power supply is inserted, the system fan will slow down to 50% of Max speed for 12 seconds. It can take up to 10 seconds for the second power supply to become active. Please do not remove the first power supply during this time-frame, in order to avoid system shutdown.


Note

When using 1100W power supplies in combined mode, you will have the power to fully support 400G optics.

When using 1100W power supplies in redundant mode, you will not have the power to fully support 400G optics. You will have the power to support 100G optics.


Note

Load optics and power supplies as needed:

  • 32x100G optics can be supported by any power supply, (1500W or 1100W) at any input voltage range.

  • 32x100G optics and 32x400G optics can be supported by two power supplies in combined mode, (1500W or 1100W) at any input voltage range.

  • 25x400G optics can be supported by a single power supply or two power supplies in redundant mode, 1100W power supply at any input voltage range.

  • 19x400G optics can be support by a single power supply or two power supplies in redundant mode, 1500W power supply at lower input voltage range of 100-120 VAC.

  • 32x400G optics can be supported by a single power supply or two power supplies in redundant mode, 1500W power supply at higher input voltage range.

The following figure shows the fan-side chassis features that you use when installing the chassis or replacing its modules.

Figure 4. Fan-Side View of the Cisco Nexus 3432D-S Chassis

1

AC power supply (1 or 2)

2

Fan modules (6)

3

Console port (RS-232)

4

Management port (RJ-45)

5

Management port (SFP)

6

USB port (1)

The following figure shows the port-side chassis features that you use when installing the chassis or replacing its modules.

Figure 5. Port-Side View of the Cisco Nexus 3432D-S Chassis

1

10-Gigabit SFP+ ports (2)

2

Beacon (BCN), Status (STS), and Environment (ENV) LEDs

3

40/100/200/400-Gigabit QSFP-DD ports (32)

The following figure shows the side chassis features that you use when installing the chassis.

Figure 6. Side View of the Cisco Nexus 3432D-S Chassis

1

Screw holes for mounting brackets

2

Grounding pad

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