Overview
These release notes describe supported hardware, software features, limitations, and operational considerations for the 9400 Series switches running IOS XE Amsterdam 17.3.x.
The 17.3.x release train is a long-lifecycle version with ongoing maintenance updates, providing a stable platform baseline for enterprise deployments.
What’s New in 17.3.x Releases
Software Enhancements (17.3.1 and Later)
Key software capabilities introduced or refined in the 17.3.x train include:
-
Expanded programmable telemetry support and model-driven interfaces
-
Enhanced SGACL logging for high-rate security event reporting
-
Precision Time Protocol (PTP) support for time synchronization
-
LACP 1:1 redundancy and dampening for enhanced link aggregation behavior
-
Secure switch-to-switch encryption on switching modules with virtual fabric
-
MPLS QoS enhancements, including weighted random early detection (WRED)
-
MPLS VPN InterAS Option AB for simplified multi-AS connectivity
-
OSPF nonstop routing and loop-free alternate fast reroute support
-
PoE port power priority configuration and power management options
-
Private VLAN support on trunk ports and aggregated links
-
Enhanced programmability features such as stable configuration persistence, certificate management, and YANG model support
These enhancements are delivered progressively across maintenance builds of the 17.3.x train.
Unsupported Features
The following features are not supported in this release train:
-
Audio Video Bridging (including IEEE 802.1AS, 802.1Qat, 802.1Qav)
-
Bluetooth wireless connectivity
-
OpenFlow plug-in integration
-
StackWise Virtual stacking mode
-
Converged branch deployment solutions
-
Gateway Load Balancing Protocol (GLBP)
-
IPsec VPN services
-
MACsec encryption between switching modules in certain configurations
-
Network-powered lighting solutions
-
Performance Monitoring (PerfMon) analytics
-
VRF-aware web authentication
These limitations apply consistently across the 17.3.x software train.
Supported Hardware
Supported Switch Chassis
| Model | Description |
|---|---|
| C9404R | Four-slot modular chassis with redundant supervisor capability |
| C9407R | Seven-slot modular chassis with redundant supervisor capability |
| C9410R | Ten-slot modular chassis with redundant supervisor capability |
Supervisor Modules
| Model | Description |
|---|---|
| C9400-SUP-1 | Supervisor 1 module |
| C9400-SUP-1XL | Supervisor 1XL module with extended resources |
| C9400-SUP-1XL-Y | Enhanced capacity supervisor module |
Gigabit Ethernet Switching Modules
| Model | Description |
|---|---|
| C9400-LC-24S | 24-port 1G SFP switching module |
| C9400-LC-48S | 48-port 1G SFP switching module |
| C9400-LC-48P | 48-port 1G PoE/PoE+ switching module |
| C9400-LC-48T | 48-port 10/100/1000BASE-T switching module |
| C9400-LC-48U | 48-port UPOE switching module |
Multigigabit Ethernet Switching Module
| Model | Description |
|---|---|
| C9400-LC-48UX | 48-port UPOE multigigabit switching module (supports up to 10G) |
Ten-Gigabit Ethernet Switching Module
| Model | Description |
|---|---|
| C9400-LC-24XS | 24-port SFP/SFP+ module for 1G and 10G |
Supervisor SSD Storage Modules
| Model | Description |
|---|---|
| C9400-SSD-240GB | 240 GB SATA SSD |
| C9400-SSD-480GB | 480 GB SATA SSD |
| C9400-SSD-960GB | 960 GB SATA SSD |
Power Supply Modules
| Model | Description |
|---|---|
| C9400-PWR-2100AC | 2100 W AC power supply |
| C9400-PWR-3200AC | 3200 W AC power supply |
| C9400-PWR-3200DC | 3200 W DC power supply |
Optics Support
A broad range of optical transceiver modules is supported on the 9400 Series platform. Compatibility depends on the selected line card and interface type, and may be updated over time through optics compatibility matrices.
Licensing, Installation, and Software Management
This release train includes guidance on available license models, installation procedures, software upgrades, downgrades, and operational best practices for modular deployment environments.
Caveats and Troubleshooting
Known limitations, open caveats, resolved issues, and operational recommendations are documented for the 17.3.x train to support predictable, stable deployments.
If further assistance is required, please visit https://itmall.sale/.