End of Software Maintenance (EoSW) is the last day that Cisco provides software updates to a device.
On most devices, after the EoSW date, Cisco is still recommending SMARTnet for 4 more years.
The Cisco End of Sale Announcement states,
"The last date that Cisco Engineering may release any final software maintenance releases or bug fixes. After this date, Cisco Engineering will no longer develop, repair, maintain, or test the product software."
After the EoSW date, the SMARTnet value proposition drops significantly and we recommend TDS-NetSupport for EoSW devices.