This file can be upgraded/copied to switches via SFTP, TFTP, or FTP, often requiring a switch reload to initiate the installation of the .bin file, especially if moving from an older 3.x release.
The 3.6E train was significant for introducing and stabilizing several converged access features:
Understanding Cisco IOS Release 03.06.10.E: The Cat3k-CAA Universal Image cat3k-caa-universalk9.spa.03.06.10.e.152-2.e10.bin
It is considered a legacy release. While it provided "long-lived extended maintenance," it is no longer the recommended release for new deployments as of 2026. 3. Key Features and Capabilities
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. This file can be upgraded/copied to switches via
Switch# copy tftp://10.1.1.50/cat3k-caa-universalk9.spa.03.06.10.e.152-2.e10.bin flash: Use code with caution.
cat3k-caa-universalk9.spa.03.06.10.e.152-2.e10.bin is a specific Cisco IOS-XE software image designed for the Cisco Catalyst 3650 and 3850 Series switches. Network engineers use this exact binary file to deploy secure, enterprise-grade routing and switching features. If you share with third parties, their policies apply
As of early 2026, the 3.6E train is very mature. It is highly recommended to check for security vulnerabilities and consider migrating to a newer, active train (like 16.x or 17.x) if possible, as older releases may lack patches for modern security threats. Key Considerations
: Signifies a digitally signed programmable application, ensuring image authenticity and integrity.
| Element | Value | Meaning | | :--- | :--- | :--- | | | cat3k_caa | The platform (Catalyst 3K) and the architecture ( caa = Converged Access Architecture). | | bundle_feature_set | universalk9 | Universal image with cryptographic (K9) and feature-rich capabilities. | | key_ver | SPA | Indicates the software bundle or its packages are digitally signed for security. | | IOS_XE_version | 03.06.10.E | The Cisco IOS XE software release number, with 'E' for Enterprise. | | IOS_image_version | 152-2.e10 | The classic Cisco IOS version (15.2(2)E10) embedded within the IOS-XE. |
Nevertheless, as it is a universalk9 image, it supports a wide array of advanced features, including: