Overview of the Cisco Nexus 9408 Switch
The Cisco Nexus 9408 (N9K-C9408) is a 4 rack unit (RU) 8-slot modular chassis switch, which is configurable with up to 128 200-Gigabit QSFP56 (256 100-Gigabit by breakout) ports or 64 400-Gigabit ports. This switch supports port-side intake airflow. The switch requires four AC, DC, or HVAC/HVDC power supplies for operation, and offers 2+2 power grid redundancy.
This switch includes the following high power optics and MACsec:
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The N9K-X9400-16W LEM offers full MACsec (128 ports) for a full load chassis with no limitation for 200G optics.
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The N9K-X9400-8D LEM offers full MACsec (64 ports) for a full load chassis but with a limit of 400G high power optics within 32pcs among 8 slots (maximum of 32 ports of 20-W optics irrespective of MACsec), and the high power optics can go in any of the 400G ports.
Default mode for this switch:
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This default role is as a leaf switch.
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The default fabric links (1/49-64) must be used for initial switch discovery via another switch.
Leaf/Spine role considerations:
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To change the switch from the default role, you must proceed as follows: the node appears as a discovered device in the fabric inventory view, you must set the role of the switch (spine or leaf) and the switch automatically goes for reboot to come up in the configured role.
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If you connect a default spine (i.e. a dual role switch that by default is a spine, such as Nexus 9316D-GX) directly to an APIC, the change of the role to leaf is performed automatically by APIC as well as the reboot. After that, the node appears in “Nodes pending registration” and you need to register the node.
The following figure shows the fan-side chassis features that you use when installing the chassis or replacing its modules.
1 |
Power supply modules (4) |
2 |
Switch card |
3 |
Fan modules (5) |
The following figure shows the port-side chassis features that you use when installing the chassis or replacing its modules.
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Management port (RJ45) |
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GPS 10 MHz |
3 |
Supervisor module (N9K-C9408-SUP-A) |
4 |
GPS 1PPS |
5 |
ToD (RF-45) |
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SYNC, TIMING, GPS, BCN, STS, and ENV, LEDs |
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Cisco Nexus line-card expansion module (LEM) (up to 8) N9K-X9400-8D shown, N9K-X9400-16W also available. |
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Management port (SFP) |
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10-Gigabit SFP+ ports |
10 |
USB 3.0 port (1)1 |
11 |
Console port (RS-232) |
The following figure shows the side chassis features that you use when installing the chassis.
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Grounding pad |