| Image | Type | Switching ASIC | L3 features | Best for | |--------|------|----------------|--------------|-----------| | (vios_l2-adventerprisek9-m-15.2) | IOU | ✅ Full | ✅ SVI, VLAN, STP | CCNA/CCNP | | IOU L2 (i86bi_linux_l2-adventerprisek9-15.1a.bin) | IOU | ✅ Full | ✅ Basic | Older GNS3 |
Switch# vlan database Switch(vlan)# vlan 10 name TEST Switch(vlan)# exit Switch# configure terminal Switch(config)# interface fastEthernet 0/1 Switch(config-if)# switchport mode access Switch(config-if)# switchport access vlan 10 Switch(config-if)# no shutdown Ping between PCs → works if switching is supported. If not — fall back to or IOU . Quick Summary Table | Requirement | Action | |-------------|--------| | Image source | Cisco.com or legal backup | | GNS3 version | 2.2.x or newer | | Emulation type | Qemu + e1000 (GigabitEthernet) or IOU (FastEthernet) | | RAM | 512 MB – 1 GB | | Boot command | console=ttyS0,9600n1 bigphysarea=60000 | | Flash disk | Create qcow2 file if boot fails | Cisco 3750 Switch Ios Image Download For Gns3 UPD
These boot in seconds and behave much closer to real 3750 switching. In GNS3, connect two PCs to the 3750 → configure VLANs: | Image | Type | Switching ASIC |