From owner-freebsd-net@freebsd.org Tue Nov 7 17:05:45 2017 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 66B69E5E0F2 for ; Tue, 7 Nov 2017 17:05:45 +0000 (UTC) (envelope-from zbeeble@gmail.com) Received: from mail-wm0-x22c.google.com (mail-wm0-x22c.google.com [IPv6:2a00:1450:400c:c09::22c]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id EF27B76FE3; Tue, 7 Nov 2017 17:05:44 +0000 (UTC) (envelope-from zbeeble@gmail.com) Received: by mail-wm0-x22c.google.com with SMTP id z3so5374858wme.5; Tue, 07 Nov 2017 09:05:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=t+lKn5XyfWHoT6ZG/fly6QpUcbKVtwno5GoNxbsubiY=; b=sGeflsci2tqluqQCofafm/EiR+aMyId+Q6OpyDAS5VTl2opHjyEABkIrix7E4sz9tZ 123XOc6fiCt+ZYnSR1xCLEP2bQGrWmmvLM9Y/YXg2/bUq/RkaZoXrJjwuzbgQ3rhlCvs puWvIaOZ5grYq+8vFPie1SiNT4YuefuPwr8cWOnDNg5oGU25p+aiwa1asFz8v7LkawLG 6anWgj589G37kDvIu+epkIRGa8pvetQQ8GHf5vYz4v4zOhijvkYQiaol4MCxY6wVA/dg r/20+9uxUr7a7MZDDtxCJ1M0nTPF7j8C6IJVNKnLiAe0tXcgVgz7H8XNQWJhptz9YQfr WwoA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=t+lKn5XyfWHoT6ZG/fly6QpUcbKVtwno5GoNxbsubiY=; b=N2voOIyhkF1TKQ6NPTeJKrP9ALvvIjLZSTp90y//TLhm7QHOHOLm+SS+AD2mzzF4OM by9A8jo6+Cz8TYjyGvEHDAdhZl/4Hmh12Su4fqku/FAYZWMgf1aXALZyjT55QUgnS+JL O6ScWA2VKoWweN69+ijXxEti89VqdRjtjrZyAdD27Uf2uXyI1phUFE1JE8H5ydihw1G3 JN/QAXySLkOHFGK8k0fRJHExaDWnSHcxNGHT0Rjqtkx8toXXzQbEvhGhpybCEX1TE9Hg 9gWVKE/HzBOkKdXKpQ3BQ79I7SHeVkH5LZSk+ZWVaaAUf9TZLWSBm1nbLdaJyS0DoMTe DcNg== X-Gm-Message-State: AMCzsaVcdkNOKUlISVfOJcxJpYcDKX0ZkNlOzuGuNIqTW2RCuDBJS3BB 9ogUrLkXdSUihDA8q0gmlRKitwWOz3nC3VkW+A== X-Google-Smtp-Source: ABhQp+RNhkNUWXoJk1ji5a/K8ipDy8mr47lCw82sFYOKJOoLu5D2MkBUhI70n1d3juM0Ub1jBF7QMAGLDjDk9DTWs9s= X-Received: by 10.80.137.91 with SMTP id f27mr24750565edf.18.1510074343119; Tue, 07 Nov 2017 09:05:43 -0800 (PST) MIME-Version: 1.0 Received: by 10.80.189.139 with HTTP; Tue, 7 Nov 2017 09:05:42 -0800 (PST) In-Reply-To: <880b0188-507d-85a7-4289-378d9c41c6ec@freebsd.org> References: <880b0188-507d-85a7-4289-378d9c41c6ec@freebsd.org> From: Zaphod Beeblebrox Date: Tue, 7 Nov 2017 12:05:42 -0500 Message-ID: Subject: Re: OCD window scaling behavior on local network. To: Sean Bruno Cc: FreeBSD Net Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.23 X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.23 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, 07 Nov 2017 17:05:45 -0000 If you'd like a copy, I'm pretty sure I can provide one. For context, I found this behaviour because I was tracing a BGP problem with an exchange's Route Server (which I believe is a cisco something-or-other). AFAICT, a software upgrade corrected that problem, but the strange window behavior remains. On Mon, Nov 6, 2017 at 2:56 PM, Sean Bruno wrote: > > > On 05/29/17 00:50, Zaphod Beeblebrox wrote: > > so... I have some really OCD window scaling behavior on a GigE local > > network. The protocol is BGP, this is one session recorded. Nearly > every > > payload packet is answered by both an 'ACK' and a 2nd window scaling > > packet. I have examined the packet counters: no errors reported by the > box > > or the managed switch. Also, TCP-MD5 is not in use, if that matters. > > > > [image: Inline image 1] > > _______________________________________________ > > freebsd-net@freebsd.org mailing list > > https://lists.freebsd.org/mailman/listinfo/freebsd-net > > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" > > > > > It looks like the attachment was stripped by the mailing list. > > sean > >