Converting a Cisco .bin file to .qcow2 is generally not possible for hardware-specific images (like those for physical Catalyst switches), as they are compiled for specific ASIC hardware rather than virtualized environments.
file, the original binary firmware of the Cisco IOS. For years, this router lived in dusty racks, but as the world moved to the cloud, engineers wanted to bring that same firmware into virtual labs like However, the
This command displays information about the Qcow2 image, including its format, size, and geometry. convert cisco bin to qcow2
Install/Transfer: Once the virtual device boots, you typically move the .bin file into the virtual flash memory of the .qcow2 disk. Key Tools & Resources
| If you have... | Recommended action |
| --- | --- |
| Legacy IOS .bin (2500, 2600, 3600, 7200) | Use Dynamips inside GNS3 or EVE-NG. Do not attempt KVM conversion. |
| IOS-XE .bin (CSR1000v) | Download the official .qcow2 from Cisco Software Center. |
| IOL .bin (IOU/L2/L3) | Run natively on Ubuntu with i86bi wrapper, or create a chroot .qcow2. |
| Curiosity & time to hack | Try QEMU’s -kernel boot with serial console; expect 90% failure. | Converting a Cisco
sudo mount /dev/nbd0p1 /mnt sudo cp -r cisco-filesystem/* /mnt/
Note: For IOS-XE, the .bin is the kernel. Append parameters like console=ttyS0 redirect serial console to QEMU. Step 1: Analyze the Binary Use binwalk to
sudo modprobe nbd max_part=8 sudo qemu-nbd -c /dev/nbd0 cisco-ios.qcow2 sudo fdisk /dev/nbd0 # Create a single bootable partition sudo mkfs.ext4 /dev/nbd0p1 sudo mount /dev/nbd0p1 /mnt
Step 1: Analyze the Binary
Use binwalk to find the embedded kernel and filesystem.