Overview
This document provides key information for NX‑OS Release 12.2(1) for Nexus 9000 Series switches operating in ACI mode. It includes supported hardware and supported fabric extenders, installation guidance, compatibility notes, usage recommendations, and known behaviors and issues. This release delivers operational stability improvements and broader hardware support for ACI fabrics.
Supported Hardware
| Hardware Type | Model |
|---|---|
| Chassis | N9K-C9504, N9K-C9508 |
| Fan Tray | N9K-C9508-FAN |
| Power Supplies | NXA-PAC-500W-PI, NXA-PAC-500W-PE, N9K-PAC-3000W-B |
| Pluggable Modules (GEM) | N9K-M12PQ, N9K-M6PQ, N9K-M6PQ-E |
| Spine Switch | N9K-C9336PQ |
| Chassis Bundles | N9K-C9508-B1, N9K-C9508-B2 |
| Spine Chassis | N9K-C9516 |
| Leaf Switches | N9K-C93108TC-FX, N9K-C93120TX, N9K-C93128TX, N9K-C93180LC-EX, N9K-C93180YC-EX, N9K-C93180YC-FX, N9K-C9332PQ, N9K-C9372PX, N9K-C9372PX-E, N9K-C9372TX, N9K-C9372TX-E, N9K-C9396PX |
Unsupported or deprecated components should be removed before upgrading.
Supported Fabric Extenders (FEX)
The following fabric extenders are supported in ACI mode:
Refer to the Nexus 2000 Series fabric extender documentation for full details.
New Features and Enhancements
This release includes the following improvements:
- Enhanced control-plane stability under specific traffic conditions.
- Expanded support for additional optics and breakout options.
- Improved telemetry reporting for large-scale deployments.
- Operational refinements for policy deployment and fabric convergence.
Installation Guidance
- Clear the switch’s current configuration.
- Power off the switch.
- Install or replace hardware modules.
- Power the switch on.
Refer to the ACI fabric hardware installation guide for complete procedures.
Compatibility Notes
- Use only optics supported for the specific device model.
- Third‑party optics are not qualified and may produce inconsistent results.
- Link‑level flow control is not supported on ACI‑mode switches.
- Use supported direct connection or breakout options for FEX.
- Fabric uplink ports must not be used as FEX fabric ports.
Usage Guidance
- Required control and management protocols must be permitted through contracts.
- A 10G interface is required for controller (APIC) connectivity on leaf nodes.
- Avoid direct connections between switches from different ACI fabrics.
- Verify MACsec/CloudSec compatibility where required.
- Remove legacy or incompatible optics prior to deployment.
Known Behaviors and Issues
This release includes documented behaviors and known issues that may impact operations:
- Specific multicast behavior under certain traffic conditions.
- Occasional unexpected node reloads or process restarts.
- Traffic anomalies or drops under particular configuration conditions.
- Counter or statistic inconsistencies after specific events.
Refer to official release documentation for complete details.
If needed, please visit https://itmall.sale/