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Re: Hari and train-up sequences


As a network architect and implementor, I have found that AN used for link speed
and duplex is the first thing that gets turned off when there is a problem with
initiating a link.  Often turning AN off and manually setting the link speed and
duplex fixes the problem.  This happens even between different units from the
same vendor.  I don't know why this works out the way that it does, it simply
does.  AN is a great idea.  Sometimes it works very well, sometimes it does
not.  Beyond simple link initialization for the fixed full duplex and fixed link
speed of a 10gb LAN or WAN PHY I do not think that AN should be considered for

Thank you,
Roy Bynum

JR Rivers wrote:

> If it didn't work, then it may not have been specified correctly.  I
> presume that most people were able to get 8b10b coding to work.  I would
> imagine that they also got other components of the autonegotiation process
> (like link speed, duplex, etc) to work.  If I'm correct, then it seems that
> the mechanism isn't flawed, but rather its use :-)
> JR