From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from MAIL1.WPI.EDU (MAIL1.WPI.EDU [130.215.36.91]) by huchra.bufferbloat.net (Postfix) with ESMTP id 4501921F1FB for ; Sun, 25 Jan 2015 07:03:09 -0800 (PST) Received: from MAIL1.WPI.EDU (MAIL1.WPI.EDU [130.215.36.91]) by MAIL1.WPI.EDU (8.15.1/8.15.1) with ESMTP id t0PF38Jt015669 for ; Sun, 25 Jan 2015 10:03:08 -0500 X-DKIM: Sendmail DKIM Filter v2.8.3 MAIL1.WPI.EDU t0PF38Jt015669 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=wpi.edu; s=_dkim; t=1422198188; bh=CKFhQsoEvkYtLf5zfAkH3sX8eNwyU6+S3aWS+AsmOyQ=; h=Date:From:To:Subject:Message-ID:References:MIME-Version: Content-Type:In-Reply-To; b=RU9y1SxWxAUS9GPuz2ApYa/vdz+6CV8gm0MKRbesIMKsOWq13A6s2pqbGa5kLry83 NkMHMd5OUHMcOy4JMkFDrOvGew/Vq1sdy3ptjurIVT1nvDSzGj64VZd07upYpoPDPU kqlyRaKrDzJ6gD/byEqignd1FKHpt7EF/wghDT1U= Received: from MX1.WPI.EDU (mx1.wpi.edu [130.215.36.141]) by MAIL1.WPI.EDU (8.15.1/8.15.1) with ESMTP id t0PF38Hr015666 for ; Sun, 25 Jan 2015 10:03:08 -0500 Received: from angus.ind.WPI.EDU (ANGUS.IND.WPI.EDU [130.215.130.21]) by MX1.WPI.EDU (8.14.4/8.14.4) with ESMTP id t0PF36jM009784 for ; Sun, 25 Jan 2015 10:03:07 -0500 (envelope-from cra@WPI.EDU) Received: from angus.ind.WPI.EDU (localhost [127.0.0.1]) by angus.ind.WPI.EDU (8.14.4/8.14.4) with ESMTP id t0PF36OG000768 for ; Sun, 25 Jan 2015 10:03:06 -0500 Received: (from cra@localhost) by angus.ind.WPI.EDU (8.14.4/8.14.4/Submit) id t0PF36G6000767 for cerowrt-devel@lists.bufferbloat.net; Sun, 25 Jan 2015 10:03:06 -0500 X-Authentication-Warning: angus.ind.WPI.EDU: cra set sender to cra@WPI.EDU using -f Date: Sun, 25 Jan 2015 10:03:06 -0500 From: Chuck Anderson To: cerowrt-devel@lists.bufferbloat.net Message-ID: <20150125150304.GU18618@angus.ind.WPI.EDU> Mail-Followup-To: cerowrt-devel@lists.bufferbloat.net References: <54C0BD22.3000608@gmail.com> <54C13F47.1010203@gmail.com> <1422111577.328132080@apps.rackspace.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-12-10) Subject: Re: [Cerowrt-devel] Recording RF management info _and_ associated traffic? X-BeenThere: cerowrt-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: Development issues regarding the cerowrt test router project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 25 Jan 2015 15:03:39 -0000 On Sun, Jan 25, 2015 at 01:39:32AM -0800, David Lang wrote: > On Sun, 25 Jan 2015, Dave Taht wrote: > > >I want to make clear that I support dlang's design in the abstract... and > >am just arguing because it is a slow day. > > I welcome challenges to the design, it's how I improve things :-) > > >On Sat, Jan 24, 2015 at 10:44 PM, David Lang wrote: > >>On Sat, 24 Jan 2015, Dave Taht wrote: > >> > > to clarify, the chain of comments was > > 1. instead of bridging I should route > > 2. network manager would preserve the IPv4 address to prevent > breaking established connections. > > I was explaining how that can't work. If you are moving between > different networks, each routed independently, they either need to > have different address ranges (in which case the old IP just won't > work), or they would each need to NAT to get to the outside (in > which case the IP may stay the same, but the connections will break > since the new router wouldn't have the NAT entries for the existing > connections) To keep your IP when roaming: 3. The old school way: use mobile IP or some other tunneling mechanism (or VPN) so you can keep your same IP. 4. Use a "virtual subnet" model similar to: https://tools.ietf.org/html/draft-ietf-l3vpn-virtual-subnet-03 The draft is focused on data centers and VM migration, but the problem is the same with client migration/mobility. I would argue that it is even easier to "discover" the location of a client with Wi-Fi because of the association/authentication handshake with the AP rather than relying on a Gratuitous ARP/ND or LLDP, VSI, etc. 5. Use LISP: http://en.wikipedia.org/wiki/Locator/Identifier_Separation_Protocol http://lispmob.org/ (supported on OpenWRT) Has anyone played with this?