From owner-freebsd-bugs@FreeBSD.ORG Wed Feb 26 20:10:00 2014 Return-Path: Delivered-To: freebsd-bugs@smarthost.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id CD5B873F for ; Wed, 26 Feb 2014 20:10:00 +0000 (UTC) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:1900:2254:206c::16:87]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id A76DD1675 for ; Wed, 26 Feb 2014 20:10:00 +0000 (UTC) Received: from freefall.freebsd.org (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.7/8.14.7) with ESMTP id s1QKA0fG068991 for ; Wed, 26 Feb 2014 20:10:00 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.8/8.14.8/Submit) id s1QKA0xO068990; Wed, 26 Feb 2014 20:10:00 GMT (envelope-from gnats) Resent-Date: Wed, 26 Feb 2014 20:10:00 GMT Resent-Message-Id: <201402262010.s1QKA0xO068990@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-bugs@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Robert Blayzor Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 83AC25B2 for ; Wed, 26 Feb 2014 20:01:15 +0000 (UTC) Received: from newred.freebsd.org (cgiserv.freebsd.org [IPv6:2001:1900:2254:206a::50:4]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 7074C1615 for ; Wed, 26 Feb 2014 20:01:15 +0000 (UTC) Received: from cgiserv.freebsd.org ([127.0.1.6]) by newred.freebsd.org (8.14.7/8.14.7) with ESMTP id s1QK1ECe040867 for ; Wed, 26 Feb 2014 20:01:14 GMT (envelope-from nobody@cgiserv.freebsd.org) Received: (from nobody@localhost) by cgiserv.freebsd.org (8.14.7/8.14.7/Submit) id s1QK1E8L040866; Wed, 26 Feb 2014 20:01:14 GMT (envelope-from nobody) Message-Id: <201402262001.s1QK1E8L040866@cgiserv.freebsd.org> Date: Wed, 26 Feb 2014 20:01:14 GMT From: Robert Blayzor To: freebsd-gnats-submit@FreeBSD.org X-Send-Pr-Version: www-3.1 Subject: misc/187094: FreeBSD DHCP ignores dhcp option interface-mtu X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 26 Feb 2014 20:10:01 -0000 >Number: 187094 >Category: misc >Synopsis: FreeBSD DHCP ignores dhcp option interface-mtu >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Wed Feb 26 20:10:00 UTC 2014 >Closed-Date: >Last-Modified: >Originator: Robert Blayzor >Release: 10.0 >Organization: INOC, LLC >Environment: FreeBSD rootbsd.ops.inoc.net 10.0-RELEASE FreeBSD 10.0-RELEASE #0 r261846: Tue Feb 25 13:50:12 UTC 2014 root@rootbsd.ops.inoc.net:/usr/obj/.amd_mnt/juno/pub/FreeBSD/10.0-RELEASE/sys/ESXBSD amd64 >Description: Upon PXE booting FreeBSD kernel trying to set a higher MTU via DHCP. Using "option interface-mtu ...." in ISC-DHCP, MTU never properly gets set to anything higher than 1500. Attempting to change the MTU in rc startup scripts only appears to cosmetically change.. dev@rns0 [~] cat /etc/rc.conf | grep vmx ifconfig_vmx0="mtu 9000" dev@rns0 [~] ifconfig vmx0 vmx0: flags=8843 metric 0 mtu 9000 options=60039b ether 00:50:56:a7:03:22 inet6 fe80::250:56ff:fea7:322%vmx0 prefixlen 64 scopeid 0x1 inet 10.0.0.20 netmask 0xffff0000 broadcast 10.0.255.255 nd6 options=21 media: Ethernet autoselect status: active dev@rns0 [~] sudo ping -D -c 1 -s 1600 10.0.0.200 PING 10.0.0.200 (10.0.0.200): 1600 data bytes ping: sendto: Message too long dev@rns0 [~] sudo ping -D -c 1 -s 1472 10.0.0.200 PING 10.0.0.200 (10.0.0.200): 1472 data bytes 1480 bytes from 10.0.0.200: icmp_seq=0 ttl=64 time=0.064 ms --- 10.0.0.200 ping statistics --- 1 packets transmitted, 1 packets received, 0.0% packet loss >How-To-Repeat: Using dhclient or PXE boot configure DHCP server to use MTU > 1500. ie: option interface-mtu 9000; System boots and gets IP address properly but MTU cannot be set. >Fix: None. Attempting to set MTU via rc.conf startup does not work. >Release-Note: >Audit-Trail: >Unformatted: