Date: Tue, 12 Jul 2011 01:47:55 -0400 (EDT) From: Charles Sprickman <spork@bway.net> To: Doug Barton <dougb@FreeBSD.org> Cc: YongHyeon PYUN <pyunyh@gmail.com>, "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>, David Christensen <davidch@broadcom.com>, David Christensen <davidch@freebsd.org> Subject: Re: bce packet loss Message-ID: <alpine.OSX.2.00.1107120143390.1070@freemac> In-Reply-To: <4E1BDD3F.4090607@FreeBSD.org> References: <alpine.OSX.2.00.1107042113000.2407@freemac> <20110706201509.GA5559@michelle.cdnetworks.com> <alpine.OSX.2.00.1107070121060.2407@freemac> <20110707174233.GB8702@michelle.cdnetworks.com> <alpine.OSX.2.00.1107072129310.2407@freemac> <5D267A3F22FD854F8F48B3D2B523819385C32D96B7@IRVEXCHCCR01.corp.ad.broadcom.com> <alpine.OSX.2.00.1107082009350.1070@freemac> <5D267A3F22FD854F8F48B3D2B523819385F12FE86B@IRVEXCHCCR01.corp.ad.broadcom.com> <alpine.OSX.2.00.1107112234460.1070@freemac> <4E1BDD3F.4090607@FreeBSD.org>
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On Mon, 11 Jul 2011, Doug Barton wrote: > On 07/11/2011 21:09, Charles Sprickman wrote: >> I've had it hammered into my brain over the years that for servers it's >> always best to set link speed and duplex manually at both ends to remove >> any possible issues with link negotiation. > > That hasn't been the right thing to do for at least 8 years or so, > probably 10 or more. > > Yes, back in the 90's when all of this stuff was still new it was not > uncommon to have autonegotiation issues, but any even sort of modern > hardware (on either side of the link) will do better with auto than not. Some of us still work at places where the hardware is 10 years old, you know. :) I do still see fixed setups in service provider handoffs - for example this colo, Level3 and Hurricane. Also all our metro ethernet stuff specifies a fixed configuration. >From what I can gather, this seems to be the standard practice in that space, but then again you're supposed to be plugging into equipment that wouldn't have the buffer issues that a $450 Dell switch would have. The rule I recall is never do autoneg on one side and fixed on the other, that more often than not will end up in a duplex mismatch. Charles > > hth, > > Doug > > -- > > Nothin' ever doesn't change, but nothin' changes much. > -- OK Go > > Breadth of IT experience, and depth of knowledge in the DNS. > Yours for the right price. :) http://SupersetSolutions.com/ > >
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