The Cisco Catalyst 4500 E-Series offers four chassis options and seven supervisor engine options. It provides a common architecture that can scale up to 388 ports. The Cisco Catalyst WS-C4507R-E and WS-C4510R-E offer high availability in supporting 1+1 redundant supervisor engines with subsecond failover time and full image In Service Software Upgrades (ISSU). Using the same line cards as the widely deployed legacy Catalyst 4000 Series Switches and Classic Catalyst 4500 Series Switches, the Catalyst 4500-E Series enhances the Cisco commitment to affordable enterprise and branch scalability.