From owner-freebsd-net@freebsd.org Fri Jul 13 15:56:03 2018 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 08E671041AC4 for ; Fri, 13 Jul 2018 15:56:03 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id 95C928C36E for ; Fri, 13 Jul 2018 15:56:02 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.ysv.freebsd.org (Postfix) id 5969D1041AC3; Fri, 13 Jul 2018 15:56:02 +0000 (UTC) Delivered-To: net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 47AFE1041AC2 for ; Fri, 13 Jul 2018 15:56:02 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.ysv.freebsd.org (mxrelay.ysv.freebsd.org [IPv6:2001:1900:2254:206a::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.ysv.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id DAAA28C36C for ; Fri, 13 Jul 2018 15:56:01 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.ysv.freebsd.org (Postfix) with ESMTPS id 090B5E09F for ; Fri, 13 Jul 2018 15:56:01 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id w6DFu0It022952 for ; Fri, 13 Jul 2018 15:56:00 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id w6DFu0qH022951 for net@FreeBSD.org; Fri, 13 Jul 2018 15:56:00 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 229727] On install, Broadcom chipset doesn't receive DHCPOFFER Date: Fri, 13 Jul 2018 15:56:00 +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 Only Me X-Bugzilla-Who: rgrimes@FreeBSD.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: 2.1.27 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 Jul 2018 15:56:03 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D229727 --- Comment #5 from Rodney W. Grimes --- (In reply to Stephan Neuhaus from comment #4) My experience has been that STP interacts very poorly with any clients tryi= ng to do DHCP as the normal time for STP to decide a port is NOT connected to another switch is on the order of 30 seconds, which is frequently beyond the timeouts of DHCP request/offer cycles. Some machines well work, some well not, and it is all very flackey until you either turn STP off on the port, = or set it to fast mode. Part of the problem is that boot time stuff likes to reset NIC's, and resetting the NIC drops carrier, which causes the STP deci= sion all over. This is especially annoyed when chain loading from a native PXE = to iPXE, often leading to iPXE load failures. The only way to remove this variable is to either make sure STP is off on t= he port, or set to stp fast mode. Using the same switch for both client/server does NOT remove stp from the p= ath, that single switch should still be trying to do stp. --=20 You are receiving this mail because: You are the assignee for the bug.=