Verify the MD5 checksum of the downloaded file against Cisco's published hash to ensure file integrity. Push the image file onto the router's local flash storage:
Router> enable Router# show version | include image Router# dir usb0: Router# copy usb0:c2951universalk9mzspa1573m8bin flash:
The "Universalk9" image supports all feature sets (IP Base, Data, UC, Security), but you need the correct license activated. c2951universalk9mzspa1573m8bin updated
: Resolves internal engine errors found in earlier 15.4 or 15.5 builds, including VRF routing leaks, memory leaks in cryptographic modules, and SIP voice gateway drops.
: Minimum 256 MB required to store the approximately 110 MB binary payload alongside older system recovery files. Verify the MD5 checksum of the downloaded file
After the router reboots, use show version to confirm the new image is running. Conclusion
Let's break down the filename:
After the reload, use show version again to confirm that the router is now running IOS version 15.7(3)M8.
Once the router reboots: