Zone-Based Firewall (ZBF) Maturity: Version 15.2(1) stabilized ZBF parameters and parameter maps, reducing CPU spikes compared to 15.0(1)M.
SHA-2 VPN Support: Older 12.4 images only support SHA-1 for hashing. 15.2(1) introduces SHA-256/384/512, allowing interoperability with modern VPN peers (e.g., AWS VPN, Azure).
Ethernet CFM (802.1ag): Improved layer 2 troubleshooting for metro Ethernet deployments.
GetVPN (Group Encrypted Transport VPN) – though limited on 2800 hardware, the control plane is fully present.
Performance enhancements: The 15.2 code optimizes CEF (Cisco Express Forwarding) for the 2800’s platform-specific.
As an "Advanced Enterprise" image, it supports a vast array of networking technologies: Robust Security
