From nobody Fri Mar 4 21:42:36 2022 X-Original-To: bugs@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 04F3C1A06C3B for ; Fri, 4 Mar 2022 21:42:37 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4K9LtN5zW7z3QcK for ; Fri, 4 Mar 2022 21:42:36 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id AE0B214313 for ; Fri, 4 Mar 2022 21:42:36 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 224Lga5t065018 for ; Fri, 4 Mar 2022 21:42:36 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 224Lgatk065017 for bugs@FreeBSD.org; Fri, 4 Mar 2022 21:42:36 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 262316] em(4) does not autonegotiate when fixed media is set Date: Fri, 04 Mar 2022 21:42:36 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Many People X-Bugzilla-Who: se@FreeBSD.org X-Bugzilla-Status: Open X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Bug reports List-Archive: https://lists.freebsd.org/archives/freebsd-bugs List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-bugs@freebsd.org MIME-Version: 1.0 ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1646430156; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=pmpQBXMOmavxB1u6JbKfwWcShYGBT3djV+6p/Y+p/Tg=; b=kLEwC3Sv5csPjmTWP3ms3Grwe13srnzSeIohOt07Dgl8ahhNv9u/Gue5bFQ5o8ReF9+viI C85F7riEq4A9YeHUQ6UZcq7lUGNIEVa5gvlrbf0h9gX4Xn+VCsMa1PDUGzDKshBBWqT6Dv ILNUSD/d8yDeALb4+pXUluTjRVo0Zmielh6tK+yaa+Gh0+lPYYAnDiwwJznnik8VDYohSR y1e327/Yl06x8I2Qs8DOu01ZbfHyhe6jNcUAvK2ZpMBELLnXZhmInDfj/7SMobRwc1G2gH kCt1VIwZVhb16k/05HpHprycN2u/yjkz4FJzKZhSqqtFpdOi/AMC6TXF85/+Qg== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1646430156; a=rsa-sha256; cv=none; b=Pivwf9hDHE9axkPn87oE9ofjGvLEFGM+H5FOCI4rzc3LPqRAX73oj6T3F20aIVrpMhhGYL FJiOQ7iND48J2EkklIDyha4Gc6YO0uWdBQHPLpCuZyHc0Oi7+jYKDwtiOtA/CPYsSjzZdJ sM6xgZN8CrGbYayID6+is/xTbgZOd5haWVPeMss/+64GOag1IlnmcTuCs2v7bV2Zm2LuuX k7vvSVxJKF/AD87/jVHSUQdOcdmCtgoqEKTSVS4NmDCkUudajGv9BeUwEgfe56HyaLeHGu S+NT3Cyy2vfah3+Gc7764de41LDakEavBP6Odv7opesurqqg5zyR2tJzg/2miw== ARC-Authentication-Results: i=1; mx1.freebsd.org; none X-ThisMailContainsUnwantedMimeParts: N https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D262316 --- Comment #5 from Stefan E=C3=9Fer --- (In reply to J.R. Oldroyd from comment #3) I have located part of the IEEE 802.3 standard, specifically for Clause 37. it says in 37.1.4.4: ------------------------------------------------------------------- 37.1.4.4 User Configuration with Auto-Negotiation Rather than disabling Auto-Negotiation, the following behavior is suggested= in order to improve interoperability with other Auto-Negotiation devices. When= a device is configured for one specific mode of operation (e.g. 1000BASE-X Fu= ll Duplex), it is recommended to continue using Auto-Negotiation but only advertise the specifically selected ability or abilities. This can be done = by the Management agent only setting the bits in the advertisement registers t= hat correspond to the selected abilities. ------------------------------------------------------------------- I.e., a device manually set to operate in a fixed mode may signal the mode parameters to a partner, but it must not change its mode depending on what = the other side supports (even if this was required for a working data link). If manually set to full-duplex 1000base-X for example, the device may signal this setting and thus allows the other device to use a compatible configuration. But the manually configured device must not switch to some o= ther mode, even if the other interface does not support the manually configured mode. Modifying the manually set parameters is in violation of the standard, and = I'll close this PR again, unless there is proof of a standard clause that suppor= ts the change you are proposing. --=20 You are receiving this mail because: You are the assignee for the bug.=