| Limitation | Details | |------------|---------| | | No L2 switching; it’s an L3 image (use I86BI L2 image for switching) | | Performance | Limited to ~50–100 Mbps in emulation | | Some hardware features | No HW crypto accelerator, some platform-specific commands missing | | Clock/watchdog | Requires idle-pc tuning in GNS3 to reduce host CPU |
This image is a powerful, lightweight for Cisco’s 15.5T IOS release, intended for virtual lab environments. It provides enterprise-grade routing features without requiring physical hardware, making it a staple for network engineers and students. I86bi-linux-l3-adventerprisek9-ms.155-2.t.bin