I86bi-linux-adventerprisek9-ms.154-1.t-antigns3.bin Jun 2026

Refers to IOS XE Release 15.4(1)T . This was a stable release released around 2014. While not the latest, it supports most modern features needed for stability in labs (like BGP multipath, segment routing basics, and modern OSPFv3 implementations).

This image is a "Swiss Army knife" for certification labs (CCNA, CCNP, and CCIE), supporting: BGP, OSPFv3, EIGRP, and ISIS. MPLS: Including L3VPNs, VPLS, and Traffic Engineering. i86bi-linux-adventerprisek9-ms.154-1.t-antigns3.bin

Every IOS version has quirks. For 15.4(1)T in particular: Refers to IOS XE Release 15