Air-ct5500-k9-8-3-150-0 📌
The AIR-CT5500-K9-8-3-150-0 represents a specific hardware and software combination within the Cisco 5508 Wireless Controller series. This platform has long served as the backbone for medium-to-large enterprise wireless networks, providing the management and scalability required for high-density environments. Understanding the Hardware: Cisco 5508 Series
The AIR-CT5500-K9 identifier refers to the Cisco 5508 Wireless Controller. This unit was designed to handle the increasing demands of mobile devices and bandwidth-intensive applications. It supports up to 500 access points and 7,000 clients, making it a robust choice for campus deployments. The hardware features eight 1-Gbps SFP ports, allowing for flexible connectivity and link aggregation to prevent bottlenecks. The Software Version: 8.3.150.0
The suffix 8-3-150-0 indicates the specific Cisco Wireless LAN Controller (WLC) software release running on the device. Version 8.3.150.0 is part of the 8.3 maintenance release train. This specific version is often sought after for its stability and its role as a "Long Lived Release." Key features of the 8.3 software branch include:
Enhanced Support for Wave 2 Access Points: Improved integration with 802.11ac Wave 2 hardware.
Apple and Cisco Partnership Features: Optimized roaming and connectivity for iOS devices through "Fast Lane" technology.
High Availability (HA): Robust stateful switchover capabilities to ensure minimal downtime during a controller failure.
Advanced Security: Integration with Cisco ISE and support for sophisticated encryption standards. Critical Considerations for Modern Networks
While the AIR-CT5500-K9-8-3-150-0 is a reliable workhorse, IT administrators must be aware of its lifecycle status. The Cisco 5508 WLC has reached its End-of-Life (EoL) and End-of-Support (EoS) milestones.
Security Risks: Older software versions like 8.3.150.0 may contain vulnerabilities that are no longer patched by Cisco.
Compatibility Limits: This controller cannot manage the newest Wi-Fi 6 (802.11ax) or Wi-Fi 6E access points.
Performance Gaps: Modern throughput requirements often exceed the 8 Gbps maximum capacity of the 5508 hardware. Deployment and Use Cases
Today, this specific configuration is most commonly found in legacy environments or as cost-effective lab equipment for CCNA/CCNP Wireless certification studies. In a production environment, it is typically used in a "maintenance mode" where the goal is to keep existing Wi-Fi 5 (802.11ac) infrastructure running until a full migration to Cisco Catalyst 9800 Series controllers can be completed.
For those maintaining these units, the 8.3.150.0 image is often considered a "safe harbor" release, balancing feature sets with the memory constraints of the aging 5508 hardware. However, it is vital to check the Cisco Bug Search Tool for any caveats related to your specific access point models before deploying this firmware.
Cisco Air-CT5500-K9-8-3-150-0: A Comprehensive Overview of the Wireless Controller
The Cisco Air-CT5500-K9-8-3-150-0 is a wireless controller designed to provide a centralized management platform for Cisco wireless access points. This device is part of the Cisco 5500 Series Wireless Controllers, which are engineered to support large-scale wireless networks. In this article, we will delve into the features, specifications, and benefits of the Cisco Air-CT5500-K9-8-3-150-0, as well as its applications and use cases. air-ct5500-k9-8-3-150-0
Product Description
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:
- "Air-CT5500": This refers to the Cisco 5500 Series Wireless Controller.
- "K9": This indicates that the device is a hardware model with a specific set of features and capabilities.
- "8": This represents the number of gigabit Ethernet ports on the device.
- "3": This refers to the software feature set, which includes support for advanced wireless features such as 802.1x authentication and guest access.
- "150-0": This indicates that the device supports up to 150 access points.
Key Features and Specifications
The Cisco Air-CT5500-K9-8-3-150-0 wireless controller offers a range of features and specifications that make it an ideal solution for large-scale wireless networks. Some of its key features include:
- Centralized Management: The device provides a centralized management platform for Cisco wireless access points, allowing administrators to manage and configure wireless networks from a single location.
- Scalability: The Cisco Air-CT5500-K9-8-3-150-0 supports up to 150 access points, making it suitable for large-scale wireless deployments.
- Gigabit Ethernet Ports: The device comes with 8 gigabit Ethernet ports, providing high-speed connectivity for wired devices.
- Advanced Wireless Features: The device supports advanced wireless features such as 802.1x authentication, guest access, and wireless intrusion detection and prevention.
- Redundancy and High Availability: The device supports redundancy and high availability features, ensuring that wireless networks remain operational even in the event of a hardware failure.
Benefits of the Cisco Air-CT5500-K9-8-3-150-0
The Cisco Air-CT5500-K9-8-3-150-0 wireless controller offers a range of benefits to organizations looking to deploy large-scale wireless networks. Some of its key benefits include:
- Improved Network Management: The device provides a centralized management platform for wireless access points, making it easier to manage and configure wireless networks.
- Increased Scalability: The device supports up to 150 access points, making it suitable for large-scale wireless deployments.
- Enhanced Security: The device supports advanced wireless security features such as 802.1x authentication and wireless intrusion detection and prevention.
- Reduced Downtime: The device supports redundancy and high availability features, ensuring that wireless networks remain operational even in the event of a hardware failure.
Applications and Use Cases
The Cisco Air-CT5500-K9-8-3-150-0 wireless controller is suitable for a range of applications and use cases, including:
- Large-Scale Wireless Deployments: The device is ideal for large-scale wireless deployments, such as those found in universities, hospitals, and large enterprises.
- Wireless Network Consolidation: The device can be used to consolidate multiple wireless networks into a single, centralized management platform.
- Wireless Network Expansion: The device can be used to expand existing wireless networks, providing support for additional access points and wireless devices.
Conclusion
The Cisco Air-CT5500-K9-8-3-150-0 wireless controller is a powerful and feature-rich device that provides a centralized management platform for Cisco wireless access points. With its advanced wireless features, scalability, and redundancy and high availability capabilities, the device is ideal for large-scale wireless deployments. Whether you're looking to consolidate multiple wireless networks, expand an existing wireless network, or deploy a new wireless network, the Cisco Air-CT5500-K9-8-3-150-0 is a reliable and efficient solution.
Technical Specifications
Here are the technical specifications of the Cisco Air-CT5500-K9-8-3-150-0 wireless controller:
- Model Number: Air-CT5500-K9-8-3-150-0
- Device Type: Wireless controller
- Ports: 8 gigabit Ethernet ports
- Access Points Supported: Up to 150
- Wireless Standards: 802.11a/b/g/n/ac
- Security Features: 802.1x authentication, guest access, wireless intrusion detection and prevention
- Redundancy and High Availability: Supported
Warranty and Support
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. "Air-CT5500": This refers to the Cisco 5500 Series
Pricing and Availability
The pricing and availability of the Cisco Air-CT5500-K9-8-3-150-0 wireless controller vary depending on the region and country. Customers can contact Cisco or a local Cisco partner for more information on pricing and availability.
In conclusion, the Cisco Air-CT5500-K9-8-3-150-0 wireless controller is a powerful and feature-rich device that provides a centralized management platform for Cisco wireless access points. With its advanced wireless features, scalability, and redundancy and high availability capabilities, the device is ideal for large-scale wireless deployments.
The product AIR-CT5500-K9 refers to a Cisco 5508 Wireless Controller Go to product viewer dialog for this item.
, a legacy but foundational device in enterprise networking. The version 8.3.150.0 is a specific software release that was critical for the maintenance and feature stability of these units.
Below is an overview report on this hardware and the specific 8.3 software branch. The "Workhorse" of WLAN: AIR-CT5500-K9 Cisco 5508 Wireless Controller
was designed to support medium-to-large-scale enterprise wireless deployments.
Capacity: It supports up to 500 Access Points (APs) and 7,000 clients simultaneously.
Performance: Offers 8 Gbps of throughput, which was industry-leading during its peak.
Reliability: Known for high availability and "stateful switchover," ensuring that if one controller fails, another takes over without dropping client connections. Software Version 8.3.150.0 (Maintenance Release)
Released around 2019, this version is part of the 8.3 branch, which Cisco designated as a "Long Lived Release." This means it was prioritized for stability and security rather than just new experimental features. Critical Upgrade Precautions
If you are managing or upgrading a unit with this software, note the following important Cisco Release Guidelines:
Web-Auth Port 443 Conflict: Before upgrading to this release, Cisco recommends removing the config network web-auth port 443 configuration if it exists. Failure to do so can lead to access issues. Use the command config network web-auth port 0 to reset it. Field Notice 70440: Many 5508 controllers Go to product viewer dialog for this item.
manufactured before 2021 have an expiring certificate issue that may prevent new APs from joining. Version 8.3.150.0 and subsequent patches often address these certificate validation bugs. Legacy Status and the Shift to 9800 Series rogue AP detection
is legendary for its durability, it has reached End of Life (EoL).
Support Status: Official software maintenance and security updates from Cisco have largely concluded for the 5508 series.
Modern Successor: Organizations have migrated to the Cisco Catalyst 9800 Series Wireless Controllers, which run IOS-XE and support newer standards like Wi-Fi 6 (802.11ax). Quick Command Reference for Admins If you are troubleshooting an AIR-CT5500-K9
running 8.3.150.0, these are the most helpful "health check" commands: show sysinfo: Checks uptime and general system health.
show ap summary: Verifies how many Access Points are currently joined and operational.
show run-config startup-commands: Useful for identifying the web-auth port conflict mentioned above.
Assuming you want a feature summary for the Cisco router image "air-ct5500-k9-8-3-150-0" (Cisco AireOS/CUWN software), here’s a concise, structured feature list and notes for that release branch:
Issue: APs stuck in "Downloading" state.
- Diagnosis: Code mismatch; the AP has a different primary image.
- Solution: Log into the AP console:
debug capwap console cli. Then on WLC:config ap image predownload primary all.
1. The Name Decoded
air: Wireless product (Aironet)ct5500: Cisco 5500 Series Controller (also compatible with the virtual vWLC and 2504/7500/8500 in some code trains, but native is 5500)k9: Encryption support (SSH/SSL/AES)8-3-150-0: The software version (8.3.150.0)
Save & reload
save config reload
GUI method:
Management → Software Upgrade → Download from TFTP/FTP → select file → Reboot after download.
Warning: Do not interrupt the upgrade; loss of power during image write can brick the controller.
6. Rollback Plan
To revert to previous version:
- Ensure old image still exists in flash.
config boot primary <old-image.aes>reload
If controller fails to boot (boot loop), use ROMmon recovery via XMODEM or TFTP (boot from bootloader and load image).
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.
2. mDNS Gateway Improvements
For offices using Apple AirPlay or Google Cast, the mDNS (Multicast DNS) gateway was notoriously buggy. This image introduced stricter query filtering and TTL (Time to Live) management, preventing service advertisement storms across VLANs.
3. Key Features in Release 8.3
This software version provides the following core capabilities for the 5500 Series:
- Protocol Support: Support for CAPWAP (Control and Provisioning of Wireless Access Points), allowing the controller to manage Cisco Aironet Access Points (APs).
- High Availability (HA): Features like Stateful Switchover (SSO) and AP Stateful Failover, which allow a backup controller to take over instantly if the primary fails without dropping client connections.
- 802.11ac Wave 2 Support: Provides support for managing newer, faster Wi-Fi standards (depending on the specific AP models connected).
- mDNS Gateway: Allows Apple Bonjour services (like AirPlay and AirPrint) to work across different VLANs and subnets.
- Wireless Security: Includes features like Wireless Intrusion Prevention System (wIPS), rogue AP detection, and integration with Cisco Identity Services Engine (ISE) for policy enforcement.