Date: Wed, 2 Mar 2022 17:21:22 +0100 From: Lutz Donnerhacke <lutz@donnerhacke.de> To: tuexen@freebsd.org Cc: "J.R. Oldroyd" <fbsd@opal.com>, freebsd-net@freebsd.org Subject: Re: em(4) does not autonegotiate when fixed media is set Message-ID: <20220302162122.GA23140@belenus.iks-jena.de> In-Reply-To: <B2ACD510-EA36-4D92-8A2B-82B8E245DD98@freebsd.org> References: <20220302103331.3a50e443@opal.com> <B2ACD510-EA36-4D92-8A2B-82B8E245DD98@freebsd.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On Wed, Mar 02, 2022 at 04:40:38PM +0100, tuexen@freebsd.org wrote: > Is that what is expected? When using the above command I would expect > that 100MBit/sec is used, not that the card negotiates with the peer > something else. But my expectations might be wrong... Negotation of a given subset is useful. Some devices do not work without negotiation enabled, others refuse to work in this case. Standard requires autonegotiation for 1000TX, recommends it for lower speeds (otherwise assume half duplex). For 1000FX the situation is unclear, depends on the year the device was manufactured ... Today autoneg is expected on all interfaces even with a limited subset of capabilies.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20220302162122.GA23140>