I86bi-linux-l2-adventerprisek9-15.2d.bin !!hot!! Jun 2026

Use 15.2d for legacy exams (ICND2 200-105) or low-RAM servers. For new CCNP Enterprise (350-401 ENCOR), switch to vIOS-L2 or CML images .

It lacks ASIC-level forwarding, hardware buffers, and field-upgradable software support. It is incapable of wire-speed switching. i86bi-linux-l2-adventerprisek9-15.2d.bin

| Feature | Support | |---------|---------| | Routing | No ( ip routing disabled) | | NAT | No | | Advanced QoS (queuing) | Minimal | | StackWise / VSS | No | | PoE | No | | Performance | Limited to ~100 Mbps realistic throughput | | MAC address table size | Reduced (~2k entries) | | Jumbo frames | Not reliably supported | | Hardware forwarding | No — all CPU-based | Use 15