Hola,

en la documentación del Power Connect:

http://www.dell.com/support/troubleshooting/us/en/04/Product/powerconnect-6248

haz click en Manuals & Documentation, también te paso lo links directos:

Dell PowerConnect 6200 Series System - CLI Reference Guide

 ftp://ftp.dell.com/Manuals/all-products/esuprt_ser_stor_net/esuprt_powerconnect/powerconnect-6248_Reference%20Guide_en-us.pdf

 Dell™ PowerConnect™ 6200 Series User’s Guide

 ftp://ftp.dell.com/Manuals/all-products/esuprt_ser_stor_net/esuprt_powerconnect/powerconnect-6248_User%27s%20Guide2_en-us.pdf

 tienes que revisar qué nivel de Severidad de logging tienes establecido ya que por defecto es Informational (página 136 del manual Dell™ PowerConnect™ 6200 Series User’s Guide)

• Emergency — The highest level warning level. If the device is down or not functioning properly, an emergency log is saved to the device.

• Alert — The second highest warning level. An alert log is saved if there is a serious device malfunction,  such as all device features being down.

• Critical — The third highest warning level. A critical log is saved if a critical device malfunction occurs, for example, two device ports are not functioning, while the rest of the device ports remain functional.

• Error — A device error has occurred, such as if a port is offline.

• Warning — The lowest level of a device warning.

• Notice — Provides the network administrators with device information.

• Informational — Provides device information.

• Debug — Provides detailed information about the log. Debugging should only be entered by qualified support personnel.

También sería importante tener el firmware del switch actualizado a la última versión: v3.3.7.3

www.dell.com/.../powerconnect-6248

Saludos