!!top!! - Vios-adventerprisek9-m.vmdk.spa.157-3.m3

If you are building a GNS3 lab for route/switch, this image offers the best performance-to-feature ratio available. Treat it as a training tool, respect the licensing, and understand its hardware limitations. When you are ready for SD-WAN or 100Gbps throughput, move to IOS XE; but for mastering BGP path selection or OSPF LSA types in a 50-router topology, this VMDK remains king.

The 15.7 code train implements most features tested in the CCIE v5 and early v6 blueprints. You can practice DMVPN Phase 3, MPLS L3VPNs, OSPFv3, and EIGRP named mode without consuming the massive RAM required by the IOSv (IOSv requires 3GB+ RAM per router). Vios-adventerprisek9-m.vmdk.spa.157-3.m3