From owner-freebsd-stable@FreeBSD.ORG Wed Jul 25 00:10:10 2007 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 6890B16A419 for ; Wed, 25 Jul 2007 00:10:09 +0000 (UTC) (envelope-from karagodov@gmail.com) Received: from py-out-1112.google.com (py-out-1112.google.com [64.233.166.179]) by mx1.freebsd.org (Postfix) with ESMTP id 2896A13C45A for ; Wed, 25 Jul 2007 00:10:09 +0000 (UTC) (envelope-from karagodov@gmail.com) Received: by py-out-1112.google.com with SMTP id a73so41279pye for ; Tue, 24 Jul 2007 17:10:08 -0700 (PDT) DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:references; b=K3V3il5J3vEq/kUch651BP9HTB3uybjh/NQM9sjLc0DuHy4YwJZpb2o1iarf99f6QyCTLwcEJWEzwpiR7WOdxVhKSrziO8ZzxPtZs4NrPoMAfztY8cPzFGFHyZFBGUAhyHAxeKc6Vxwn7tBqOg8741G6VGyMmJKLx2cCrI9UQAs= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:references; b=FSmHwIaVVF5o2VsdgEfViAraOm4987kpfPq6LK3IxTFYtxHp4WMq0YRwuFvDRQ8jhwHypLyUGUCkCLoTqHHMY4UJPYdmDXVVnjYHv5Wgh3xwiSPh1d7WTvl74+wiSWdw+DmTi+S7516VA9z1E82cUQtJrevUFX211qqzdQcaSms= Received: by 10.65.242.11 with SMTP id u11mr45863qbr.1185318917978; Tue, 24 Jul 2007 16:15:17 -0700 (PDT) Received: by 10.64.53.17 with HTTP; Tue, 24 Jul 2007 16:15:17 -0700 (PDT) Message-ID: Date: Wed, 25 Jul 2007 03:15:17 +0400 From: "Alexey Karagodov" To: "Chuck Swiger" In-Reply-To: <3C09F7E4-C15A-4B9E-94A3-C4997C73C0BD@mac.com> MIME-Version: 1.0 References: <469624D1.20108@seclark.us> <4696823B.9020107@seclark.us> <46969129.60409@seclark.us> <3C09F7E4-C15A-4B9E-94A3-C4997C73C0BD@mac.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: Stephen.Clark@seclark.us, freebsd-stable@freebsd.org Subject: Re: pmtud + ipnat RELENG_6_2 appears to be broken X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 25 Jul 2007 00:10:10 -0000 is there any progress? just one "me too" this problem appeared for me when i try to use vlan over lagg ( to em NICs ) thanx kernel: vlan301: discard oversize frame (ether type 800 flags 3 len 1514 > max 1510) 2007/7/13, Chuck Swiger : > > On Jul 12, 2007, at 1:38 PM, Stephen Clark wrote: > >> The MTU is actually defined in reference to a network segment such > >> as an "ethernet collision domain", and applies to all machines > >> sending traffic to that segment. If the MTU is really 1280, > >> nobody else should be sending larger packets, and the drivers > >> will drop any larger packets they receive and generate the > >> appropriate ICMP error.... > > > > First thanks for responding but thats the problem, > > this did't generate an icmp when the packet was dropped. > > > > kernel: rl0: discard oversize frame (ether type 800 flags 3 len > > 1514 > max > > 1294) > > > > This message did not result in any icmp packet. > > > > I was running tcpdump looking for them. > > Taking a quick look at ether_input() in src/sys/net/if_ethersubr.c > suggests that you are right-- if the incoming packet exceeds the MTU > being set, the input errors count for that interface is incremented, > but no ICMP_UNREACH_NEEDFRAG is generated even if DF flag is set. > > You might file a PR and see whether you can get Andre or one of the > other networking gurus interested in fixing this. Or maybe I'll give > it a try myself if I can get some free time.... :-) > > -- > -Chuck > > > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" >