ESW-520 Series (10/100) - Total No. of ports = 24 / 48 + 4 Expansion Ports:
Cisco ESW-520-24 - 24 + 4 = 28 Ports in Total Cisco ESW-520-48 - 48 + 4 = 52 Ports in Total Cisco ESW-520-24P - 24 + 4 = 28 Ports in Total Cisco ESW-520-48P - 48 + 4 = 52 Ports in Total
ESW-540 Series (10/100/100) - Total No. of ports = 24 / 48 including Expansion Ports:
Cisco ESW-540-24 = 24 Ports in Total Cisco ESW-540-48 = 48 Ports in Total Cisco ESW-540-24P = 24 Ports in Total
The available documentation could lead you to believe the expansion ports on the 540 series switches are in addition to the 24 / 48 ports but I do not think this is the case and that the figures above are correct ?
Sx550X, Sx350X, Sx250: PSE will Supply Power to Catalyst PSE Ports
May 31, 2016
June 5, 2017
Configure Remote Network Monitoring (RMON) Events Control Settings on a Switch through the Command Line Interface (CLI)
Remote Network Monitoring (RMON) was developed by the Internet Engineering Task Force (IETF) to support...