: This "universalk9" image can be licensed at the Enterprise Services level, which supports advanced Layer 3 routing protocols such as BGP, IS-IS, and VRF-lite.
: Supports Stateful Switchover (SSO) and Nonstop Forwarding (NSF) , ensuring the network remains operational during a supervisor failure. cat4500es8-universalk9.spa.03.11.05.e.152-7.e5.bin
: Indicates this image is designed for the Catalyst 4500E series specifically using the Supervisor Engine 8-E. : This "universalk9" image can be licensed at