Upgrading switches configured in Virtual Switching System (VSS) mode requires additional coordination. Community posts note that ISSU (In‑Service Software Upgrade) on Catalyst 4500 series can be unreliable, with “flaky” behavior reported by multiple administrators. The recommended approach involves a sequenced reload similar to the redundant supervisor procedure but with VSS‑specific commands to manage the virtual domain.
| Token | Meaning | Implication for your network | | :--- | :--- | :--- | | | Platform ID | Catalyst 4500 series with ES8 line cards (Classic Sup II+/V/VS). Not for Sup6/7/8. | | universalk9 | Feature Set & Crypto | Universal image with K9 (AES/3DES encryption). Enables LAN Base, IP Base, or Enterprise Services via license. | | spa | Packaging | Shared Port Adapter support; also indicates the image is a "Service Provider Advantage" variant. | | 03.11.05.e | IOS version (ED) | Mainline release 15.2(7)E5. The e denotes Early Deployment (ED) . | | 152-7.e5 | Internal version | IOS 15.2(7)E5. The e5 indicates the 5th engineering rebuild of the 15.2(7)E release. | | .bin | File type | Binary executable; the bootable operating system. |
: Strictly for the Supervisor Engine 8-E (WS-X45-Sup8-E). cat4500es8-universalk9.spa.03.11.05.e.152-7.e5.bin
The cat4500es8-universalk9.spa.03.11.05.e.152-7.e5.bin software for Catalyst 4500-E series switches offers a robust and feature-rich solution for enterprises looking to leverage advanced networking capabilities. With its focus on security, programmability, and performance, this software version can help organizations meet their current and future network demands. However, careful planning and testing are crucial for a successful deployment.
Highly Stable & Recommended for Standard Enterprise Access/Distribution Layers. If you are running Supervisor 8-E hardware and require a rock-solid environment without needing the absolute latest feature sets introduced in IOS XE Denali (16.x) or Everest (17.x), this is likely the most stable version available in the 3.x train. | Token | Meaning | Implication for your
This software release is part of the train, designed specifically for the Catalyst 4500 Supervisor Engine 8-E. It is a mature, Extended Maintenance (EM) release.
Before downloading or loading this file, verify your hardware compatibility. This image is universal across all 4500 variants. Enables LAN Base, IP Base, or Enterprise Services
Since it is a universalk9 image, the features available (like BGP or OSPF) will depend on the Right-To-Use (RTU) license activated on the chassis.
The 4500 series (especially older supervisors like the 6/E, 7/E, 8/E) and IOS 15.2(7)E trains are past Cisco’s End of Support. No new security patches or bug fixes.
: Pairs two distinct Catalyst 4500E chassis into a single logical network entity. This increases structural link bandwidth and provides sub-second failover times without needing STP loop management.