Hi every body!
I just want to know how one can disable the auto-negotiation on switch's port? My book says configuring speed and duplex will disable the auto-negotiation.But i read somewhere auto-negotiation is disabled by configuring duplex mode.
thanks a lot!
"I also belived that auto-negotiation only help decides the duplex mode."
Sorry if i gave you the wrong impression. Auto-negotiation uses Fast link Pulses (FLP) to determine both the duplex AND the speed.
However if auto-negotiation is disabled then duplex cannot be discovered ie. it must be hardcoded, but speed can be detected using other means eg. the incoming electrical signal.
So a better way to put it -
auto-negotiation on = duplex and speed both determined using FLP.
auto-negotiation off - duplex cannot be detected but speed can using different method.
Auto-negotiation is primarily concerned with duplex and not speed. If you disable auto-negotiation then the switch can still detect the speed based on the incoming electrical signal.
I have always worked on the assumption that if you want to disable auto-negotiation you should configure both speed and duplex explicitly.