From owner-freebsd-bugs@FreeBSD.ORG Wed Oct 8 11:59:17 2014 Return-Path: Delivered-To: freebsd-bugs@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id B0C26906 for ; Wed, 8 Oct 2014 11:59:17 +0000 (UTC) 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 mx1.freebsd.org (Postfix) with ESMTPS id 9239C358 for ; Wed, 8 Oct 2014 11:59:17 +0000 (UTC) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.14.9/8.14.9) with ESMTP id s98BxHYW097114 for ; Wed, 8 Oct 2014 11:59:17 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 194238] New: Ping attempted with MTU 9000 transmits fragmented packets of size 1500 Date: Wed, 08 Oct 2014 11:59:17 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 10.0-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Many People X-Bugzilla-Who: praveenchoudary.gokina@emulex.com X-Bugzilla-Status: Needs Triage X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-bugs@FreeBSD.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 08 Oct 2014 11:59:17 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=194238 Bug ID: 194238 Summary: Ping attempted with MTU 9000 transmits fragmented packets of size 1500 Product: Base System Version: 10.0-RELEASE Hardware: amd64 OS: Any Status: Needs Triage Severity: Affects Many People Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: praveenchoudary.gokina@emulex.com Setup Details: Machine1: OS: FreeBSD 10.0 We are using below Emulex skyhawk adapter. oce3@pci0:4:0:3: class=0x020000 card=0xe8fe10df chip=0x072010df rev=0x10 hdr=0x00 vendor = 'Emulex Corporation' device = 'OneConnect NIC (Skyhawk)' class = network subclass = ethernet bar [10] = type Prefetchable Memory, range 64, base 0xfa700000, size 16384, enabled bar [18] = type Prefetchable Memory, range 64, base 0xfa620000, size 131072, enabled bar [20] = type Prefetchable Memory, range 64, base 0xfa600000, size 131072, enabled Machine2: OS: FreeBSD 10.0 We are using below Emulex skyhawk adapter. oce1@pci0:5:0:1: class=0x020000 card=0xe80010df chip=0x072010df rev=0x10 hdr=0x00 vendor = 'Emulex Corporation' device = 'OneConnect NIC (Skyhawk)' class = network subclass = ethernet bar [10] = type Prefetchable Memory, range 64, base 0xfa780000, size 16384, enabled bar [18] = type Prefetchable Memory, range 64, base 0xfa720000, size 131072, enabled bar [20] = type Prefetchable Memory, range 64, base 0xfa700000, size 131072, enabled Both the adapters are connected directly without switch. Both the interfaces are configured with mtu=9000 When we send jumbo frames from machine1 to machine2, packets are getting fragmented to 1500bytes. To reproduce, we can use "ping -s 9000 " on Machine1. tcpdump on Machine1 shows packets of length 1500 bytes. We are observing this behavior even with other adapters like Intel igb0@pci0:2:0:0: class=0x020000 card=0x152115d9 chip=0x15218086 rev=0x01 hdr=0x00 vendor = 'Intel Corporation' device = 'I350 Gigabit Network Connection' class = network subclass = ethernet bar [10] = type Memory, range 32, base 0xfbc20000, size 131072, enabled bar [18] = type I/O Port, range 32, base 0xe020, size 32, enabled bar [1c] = type Memory, range 32, base 0xfbc44000, size 16384, enabled -- You are receiving this mail because: You are the assignee for the bug.