Product Id: 21584523
Description: Cisco Enhanced EtherSwitch Service Module Advanced - Switch - L3 - managed - 48 x 10/100 + 2 x SFP - plug-in module - PoE - for Cisco 2921, 2951, 3925, 3945; Catalyst 2960-48, 3560E-48
Mfr Part #: SM-D-ES3-48-P=
The Cisco Enhanced EtherSwitch Service Module helps ensure maximum availability, high performance, ease of upgrade, and expandability. The modules have their own processors, switching engines, and flash memory that run independently of host router resources, helping ensure maximum concurrent switching and routing performance as well as providing security, and increased ease of management.