From owner-freebsd-net@freebsd.org Sun Aug 23 15:43:13 2020 Return-Path: Delivered-To: freebsd-net@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 2B2283C0D55 for ; Sun, 23 Aug 2020 15:43:13 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (unknown [127.0.1.3]) by mx1.freebsd.org (Postfix) with ESMTP id 4BZKKF0Q2Tz3XqX for ; Sun, 23 Aug 2020 15:43:13 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id 0DFCD3C0D54; Sun, 23 Aug 2020 15:43:13 +0000 (UTC) Delivered-To: net@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 0DC9B3C0D53 for ; Sun, 23 Aug 2020 15:43:13 +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 "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4BZKKD6gJ6z3XKG for ; Sun, 23 Aug 2020 15:43:12 +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 C9B0C9670 for ; Sun, 23 Aug 2020 15:43:12 +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 07NFhCTv072200 for ; Sun, 23 Aug 2020 15:43:12 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 07NFhC5Z072199 for net@FreeBSD.org; Sun, 23 Aug 2020 15:43:12 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: net@FreeBSD.org Subject: [Bug 246660] Sporadic LACP Lagg Flap Date: Sun, 23 Aug 2020 15:43:11 +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: 12.1-STABLE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: nonesuch@longcount.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: net@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 MIME-Version: 1.0 X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 23 Aug 2020 15:43:13 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D246660 --- Comment #2 from nonesuch@longcount.org --- Alex I have a span port setup on each switch going into a tap / agg switch that feeds a corvil packet capture box. From the corvil I can pull the traffic by mac and look at what was going on using wireshark going back about 3 weeks. Second thing I did was capture the details from net.link.lagg.lacp.debug = =3D 1.=20 Looking a the two sources i can see the Freebsd side of things seams to mis= s a beat, by slowing down somehow . I am not exactly sure how or why this is happening.=20=20=20 So far I have two ideas why this is going on. In 11 something the sysctl net.link.lagg.default_use_flowid was changed from a default of 1 to 0 .=20 I suspect this can be causing the issue. Setting use flowid to 1 appears to keep all of the arp, lacp and non ip protocols on queue 0 . This prioritizes the traffic enough to make the kernel lcap bits respond fast enough.=20 Here is the post about the lacp change. Maybe we can ping someone from Multiplay . https://www.mail-archive.com/svn-src-all@freebsd.org/msg155156.html --=20 You are receiving this mail because: You are the assignee for the bug.=