Air-ct5500-k9-8-3-150-0 Jun 2026

AIR-CT5500-K9-8-3-150-0 refers specifically to a software image file ( Cisco 5508 Wireless LAN Controller (WLC) , running version Cisco Community

This software version provides the following core capabilities for the 5500 Series:

Wireless controllers in HA - upgrade steps - Cisco Community

is part of the 8.3 maintenance release train, which is often regarded as a "long-lived" or "standard" deployment target for administrators seeking stability over experimental features.

The release is part of the Cisco Wireless Software Release 8.3 family. While early versions of the 8.3 train introduced major features, the 8.3.150.0 iteration is a "Maintenance Release" aimed primarily at reliability. Platform: Cisco 5500 Series Wireless Controller (5508). Release Focus: Stability enhancement and bug fixes. air-ct5500-k9-8-3-150-0

The Cisco Air-CT5500-K9-8-3-150-0 is a specific model of wireless controller that comes with an 8-port gigabit Ethernet switch, supporting up to 150 access points. The product code "Air-CT5500-K9-8-3-150-0" can be broken down as follows:

: Release 8.3 typically supports access points ranging from the older 1140 and 3500 series to the 1700, 2700, and 3700 series.

: Supports fast roaming (Fast Transition) for Apple iOS 10 devices without explicitly enabling FT, maintaining compatibility with legacy clients. Security & Compliance

Direct upgrades from very old code (like 7.x) to 8.3.150.0 are without intermediate steps. You must upgrade incrementally (e.g., 7.6 -> 8.0 -> 8.3.150.0) to avoid corrupting the image. Platform: Cisco 5500 Series Wireless Controller (5508)

Using a TFTP server (ensure the MD5 hash matches Cisco’s portal to avoid corruption), initiate the transfer via the controller’s CLI:

: Resolves critical memory leaks, unexpected reboots, and protocol vulnerabilities found in earlier 8.3 builds.

Here’s a breakdown of why this specific version and hardware are interesting for network enthusiasts and professionals: Decoding the Name AIR-CT5500-K9 : This identifies the hardware family—the Cisco 5500 Series Wireless Controller

Ensure all APs join successfully and download their matching 8.3.150.0 image. Common Troubleshooting Scenarios You must upgrade incrementally (e.g.

The software version is part of the AireOS 8.3 maintenance train, recognized for its stability and feature-rich environment for "legacy" controllers like the 5508. This version brought several critical enhancements: Overview [Cisco 5500 Series Wireless Controllers]

The Cisco Air-CT5500-K9-8-3-150-0 wireless controller comes with a limited lifetime warranty and support from Cisco. The device is also supported by Cisco's extensive network of partners and resellers, providing customers with access to a wide range of services and support options.

Ensure you are upgrading from a compatible intermediate version.