Air-ct5500-k9-8-3-150-0 Now

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

2.2 AP Compatibility

Supports 802.11n/ac Wave 1 APs (e.g., 1700, 2700, 3700, 1570) but not Wave 2 APs (1800, 2800, 3800).
Check AP support matrix for 8.3.150.0 – many older APs (1240, 1260) are not supported beyond 8.0 or 8.1. air-ct5500-k9-8-3-150-0

Key Features

• Scalability: The 5500 series offers high scalability, supporting a large number of access points (APs) and wireless clients. This makes it ideal for large campuses, large enterprises, or service providers.
• High Availability: Features like redundancy and high availability ensure minimal downtime, which is critical for business operations.
• Mobility: It supports seamless roaming and mobility across the wireless network, ensuring continuous connectivity for mobile devices.
• Security: Cisco emphasizes security with features like secure guest access, comprehensive threat protection through integration with Cisco's security solutions, and compliance with regulatory requirements.

Common Post-Upgrade Issues:

| Issue | Likely Fix | |--------------------------------|------------------------------------------------------------------| | APs not joining | Downgrade AP image mismatch – push new AP image via config ap image predownload primary | | Web GUI inaccessible | Clear browser cache, or reset HTTP/HTTPS: config network secureweb disable then enable | | Excess memory usage | Reboot again; if persists, check for memory leak in TAC case | | Rogue/edCA high CPU | Downgrade to 8.3.140.0 if severe – known 8.3.150.0 bug in some environments | Common Post-Upgrade Issues: | Issue | Likely Fix

• CVE-2019-15275 (Critical): Unauthorized access to the CLI.
• CVE-2018-15326 (Critical): Denial of Service via packet of death.
• CVE-2017-12219 (High): Maglev protocol vulnerability.