Cisco IOS Software Releases 12.1 Mainline - Retirement Notification
The Cisco IOS Software Releases 12.1 Mainline has been retired and is no longer supported.
End-of-Sale Date : 2008-05-23
End-of-Support Date : 2013-05-24
Cisco's End-of-Life Policy
You can view a listing of available Networking Software (IOS & NX-OS) offerings that best meet your specific needs