Is your Cisco network still performing as well now as when it was new? Do you want more from your network? What Cisco products would work best for your business?
This document is a collation of data on cisco.com about the availability and lifecycle of legacy Cisco products, and what are the best migration options depending upon your requirements.
3. Release Life Cycle Detail (example: T train) Maintenance Releases 0 ~24 12 ~58 Months First Commercial Shipment (FCS) General Deployment Status End of Sales (EOS) End of Scheduled Maintenance (EOE) Last Date of Support (LDoS, formerly EoL) ~12 to 24 ~18 to 24 Major Created Features ED LD GD
Next, we will take a closer look at the major release life cycle. A release typically “lives” for two to two and a half years from First Commercial shipment to End of Engineering. Each release receives regular maintenance typically ranging from 8 weeks to 13 weeks. Remember, we do not add new functionality during the major release life cycle. Let me summarize the milestones within this life cycle First Commercial Shipment: The beginning date where the product is orderable; initial production delivery of a new software release. General Deployment: This is a key development milestone, which we will discuss in more detail later End of Sales: This is the final date that the product can be ordered. End of Scheduled Maintenance or End of Engineering: Last Date of Support (formerly End of Life): The product is no longer supported by CSE and is removed from CCO.