From owner-freebsd-net@FreeBSD.ORG Tue Jun 24 18:58:42 2014 Return-Path: Delivered-To: freebsd-net@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 551B2405 for ; Tue, 24 Jun 2014 18:58:42 +0000 (UTC) Received: from mail-oa0-f51.google.com (mail-oa0-f51.google.com [209.85.219.51]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 1D4372C9A for ; Tue, 24 Jun 2014 18:58:41 +0000 (UTC) Received: by mail-oa0-f51.google.com with SMTP id j17so855318oag.24 for ; Tue, 24 Jun 2014 11:58:35 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=VY/42XxlPlFaHd4ufj46AZ4E1o1NS1Fj8jyvoYX29qs=; b=lP8EHTOyjjuft71fK3QoVp/1l/5FuaOSzFLBGY8o4lKPvC+dDagMDL3XtiixXKj8si mSrkBWuZPwSMq6DTNJjmS/KhmyYqaZC1G0c1HR1P26Vs/7V+zE97dEe+bMLIce1KUgmZ QEDdBy3naziVULJozcIMKGbqto0yJeUqsYAAjt2NPv9jBywsdr/W9XWPacpbz45uCA/C C2yq4iwurqAf/J+rqGw+VYSCMD5BcySB9Z4AYV5W3qkHcUbn/sIWMqgkJ7/FVGxEdxaJ GbH3r+IviNGNODgC/ju1f+3mhRt/altR7KUMYZHLUZGOt82XdIt3HOJC2NSRtrIw7P0I Xg9A== X-Gm-Message-State: ALoCoQkAs5VVz4xWetPV2qf4riapP7o9rcM/PY64WtKzWDE4y1SX7T9m+LZG8kXh9VMoRKk2MNJC MIME-Version: 1.0 X-Received: by 10.60.57.3 with SMTP id e3mr2806999oeq.33.1403635958655; Tue, 24 Jun 2014 11:52:38 -0700 (PDT) Received: by 10.60.11.134 with HTTP; Tue, 24 Jun 2014 11:52:38 -0700 (PDT) In-Reply-To: <53A9C6D0.3090900@netfence.it> References: <53A9C6D0.3090900@netfence.it> Date: Tue, 24 Jun 2014 11:52:38 -0700 Message-ID: Subject: Re: MTU not regrowing? From: Michael Sierchio To: Andrea Venturoli Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.18 Cc: "freebsd-net@freebsd.org" X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 24 Jun 2014 18:58:42 -0000 On Tue, Jun 24, 2014 at 11:43 AM, Andrea Venturoli wrote: > _ the system had vlan3 interface, with default MTU (1500 bytes); > _ "ping -D -s 1400 somehost" would work, but "ping -D -s 1500 somehost" > would yield "frag needed and DF set" (forgive me if the message is not > exact, I don't have it anymore); Does your interface support hardware VLAN tagging? (i.e. does an ifconfig show VLAN_HWTAGGING?) - M =C3=97