Have to manually set duplex and speed on PoE

December 1, 2010 at 06:55:11
Specs: Windows XP
We upgraded a switch last night from a standard HP switch to a Cisco 3750 PoE. All the workstations reconnected except one. When we connected a laptop to the same cable (that the workstation was connected to) the laptop came online. However the workstation would not come online. After manually setting the Workstation's Speed/Duplex to 100/Full, it came up immediately.

Why would I have to do this?


See More: Have to manually set duplex and speed on PoE

Report •

#1
December 1, 2010 at 07:02:13
It's a long known fact that autonegociate doesn't always work

Answers are only as good as the information you provide.
How to properly post a question:


Report •

#2
December 1, 2010 at 07:30:47
Guess I never got the memo :)
Is there any further explanation as to why? MDI-(X) default settings from the NIC manufacturer, or anything like that?

Report •

#3
December 1, 2010 at 07:53:42
autonegociate is a complicated handshake where both sides decide what's best for them. Sometimes they fail to agree. This used to be a bigger problem with older equipment but is rare now. Understanding how things work help you figure out where to look. You looked in the right place :-)

Answers are only as good as the information you provide.
How to properly post a question:


Report •
Related Solutions


Ask Question