Although it does still happen.  Recently installed a new L3 switch and
had to manually configure the speed/duplex on the connection to my old
firewall, which was an old HP server running Checkpoint.  Auto just
wouldn't work, and I'd get at least 50% packet loss... 


Joe Heaton

-----Original Message-----
From: Phil Brutsche [mailto:[EMAIL PROTECTED] 
Sent: Monday, June 09, 2008 8:07 PM
To: NT System Admin Issues
Subject: RE: Network switch problem?

They will auto-negotiate to the fastest common link mode, provided you
haven't hard-coded a specific speed & duplex.

If you're going to hard-code the speed & duplex there are a few simple
rules to follow:

a) You *must* hard-code the speed & duplex on both sides of the ethernet
link to the *same* values
b) If you can't set the speed & duplex on one side (ie you're using an
unmanaged switch), *don't* set it on the other; let them auto-negotiate.

In the case of B), if the two sides don't auto-negotiate properly you've
got a case where you *really* need a managed switch.

These days it's extremely uncommon for auto-negotiation to not just
work.

David Lloyd <[EMAIL PROTECTED]> previously uttered:

> Does that mean when I plug this in I have to configure the ports 
> manually to operate at 1000tx? I thought most switches where plug and 
> go if you know what I mean, though I have never dealt with anything 
> expensive before.

-- 

Phil Brutsche
[EMAIL PROTECTED]


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