This specific maintenance release, 3.11.4E, was published around March 2019 . Documentation & Resources
: Specifies the hardware platform (Catalyst 4500E chassis with Supervisor Engines like the 7-E, 7L-E, or 8-E).
Works alongside SSO to prevent routing protocol convergence delays during a supervisor failover. 3. Advanced Routing and Layer 3 Features cat4500e-universalk9.spa.03.11.04.e.152-7.e4.bin
Ensures critical traffic like voice and video receives appropriate bandwidth allocations during congestion.
: Indicates this is a "Universal" image containing all feature sets (IP Base, Enterprise Services, etc.). The "k9" signifies that it supports strong payload encryption (triple DES/AES). This specific maintenance release, 3
Robust support for identity-based network access control via MAC Authentication Bypass (MAB) and Web Authentication.
: Support for SSH, SSL, and encrypted VPNs. The "k9" signifies that it supports strong payload
The file is a specific system software image for the Cisco Catalyst 4500E Go to product viewer dialog for this item. and Go to product viewer dialog for this item.