The Cisco Catalyst 4510R-E Switch is now obsolete (past End-of-Life and End-of-Support status).
End-of-Sale Date: 2013-04-16
End-of-Support Date: 2018-04-30
Cisco's End-of-Life Policy
For a replacement, we recommend the Catalyst 9400 Series Switches
You can view a listing of available Campus LAN Switches - Access offerings that best meet your specific needs
If you want support information for the Cisco Catalyst 4510R-E Switch documentation, it may be available through Cisco.com Search or in the Cisco Community