Donald Becker wrote: > > That is a very bad solution. If you must must disable autonegotiation > because of flawed hardware, disable the broken end and allow > the link to > use half duplex. > > Auto-negotiation is reliable, and failure is always because of flawed > hardware. In the past there were several switch vendors that didn't > want to acknowledge problems with what they were shipping, > and therefore > implied that auto-negotiation was flawed as a concept. > Modern products > almost universally implement it correctly, and there is now a quiet > restatement of recommended practices. > http://www.cisco.com/warp/public/473/46.html > > A quick background on autonegotiation is available at > http://scyld.com/expert/NWay.html > > > Bottom line: Auto-negotiation works. If you turn it off because of > broken switches, never set the port forced-full-duplex mode. But from reading Table 1 in the article on the cisco site, if the problem is at the switch end, the *ONLY* way to get a 100MB connection is to manually configure both ends. Now I'm not au-fait with the reasons to choose half-duplex or full-duplex so I could be missing the point, but I do know that if it comes to a choice between a 10MB link, a 100MB link with a mismatched duplex or a working 100MB link then I'll choose the 'bad solution' of manual configuration. Later, Andy -------------------- Dr. Andy Law -------------------- Head of Bioinformatics - Roslin Institute Unfortunately, legal niceties require me to add the following to this message... The information contained in this e-mail (including any attachments) is confidential and is intended for the use of the addressee only. The opinions expressed within this e-mail (including any attachments) are the opinions of the sender and do not necessarily constitute those of Roslin Institute (Edinburgh) ("the Institute") unless specifically stated by a sender who is duly authorised to do so on behalf of the Institute.