I86bi-linux-l3-adventerprisek9-ms.155-2.t.bin Download [portable] -extra Jun 2026

configure terminal hostname R1 interface GigabitEthernet0/0 ip address 192.168.1.1 255.255.255.0 no shutdown router ospf 1 network 192.168.1.0 0.0.0.255 area 0 end write memory

: Identifies the Cisco IOS version as 15.5(2)T , a stable release widely used for certification preparation.

| Extra Component | Purpose | |----------------|---------| | licenses/ | IOL license files ( FLF , IOL_LIC ) | | iourc | Sample license configuration | | startup-configs/l3_default.cfg | Predefined L3 switch config | | crypto-keys/ | Test RSA keys for VPN labs | | extra_features/ | Optional L3 protocols (OSPFv3, EIGRP, BGP sample configs) | | dynamips_iou/ | YAML/INI wrapper for IOU use |

The 155-2.T image is known for its stability compared to some newer images, making it perfect for labs that require high-availability features.