Thus, “converting” is actually . Doing it better means doing it without corrupting crypto signatures, breaking dependencies, or losing boot capability. Part 2: The Wrong Ways – Common Mistakes When Converting BIN to PKG (And Why They Fail) Let’s clear the table of bad advice first. Mistake #1: Renaming .bin to .pkg Result: The device rejects it with “Digital signature verification failed.” Why: Cisco PKGs contain a special header and CMS signatures. Renaming doesn’t add those. Mistake #2: Using 7-Zip or WinRAR to Extract Result: You get garbage files, not bootable PKGs. Why: Cisco BINs are not standard archives. They use a proprietary packaging format (often with zip or xz compression inside, but not directly mountable). Mistake #3: Copying a PKG from Another Device Result: Dependency hell. The PKG may load but cause random crashes. Why: PKGs are hardware-specific and build-version locked. Mistake #4: Using Unsigned Third-Party Tools from Forums Result: Possibly malware, or at least an image that Cisco TAC will refuse to support. Why: Any modification breaks Cisco’s Secure Boot chain.
switch# request platform software package expand file flash:cat9k_iosxe.17.09.01.SPA.bin to flash: cisco convert bin to pkg better
Expanding file flash:cat9k_iosxe.17.09.01.SPA.bin Extracting packages: cat9k-cc_17.09.01.SPA.pkg ... OK cat9k-espbase_17.09.01.SPA.pkg ... OK cat9k-routing_17.09.01.SPA.pkg ... OK packages.conf (updated) ... OK Expansion completed successfully. Converting BIN to PKG is useless if you don’t change the boot variable: Thus, “converting” is actually
You need to convert a Cisco .bin file to a .pkg file. But here’s the truth: Mistake #1: Renaming
switch# install set-config active packages flash:packages.conf switch# install commit switch# write memory switch# reload After reload, verify:
boot system flash:packages.conf boot system flash:old-image.bin If the PKG set fails to boot, the device automatically falls back to the BIN. The Scenario: A bank had 200 Catalyst 9300 switches running IOS-XE 16.12 in BUNDLE mode. They wanted to upgrade to 17.09 (PKG-only) but feared downtime. Their initial plan: manually rename BIN to PKG (fail) then attempt to use a random Python extractor (bricked 2 switches).
import paramiko import time devices = ["10.1.1.1", "10.1.1.2"] bin_file = "flash:cat9k_iosxe.17.09.01.SPA.bin"