From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ia0-f171.google.com (mail-ia0-f171.google.com [209.85.210.171]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id C296021F12A for ; Mon, 10 Dec 2012 06:51:44 -0800 (PST) Received: by mail-ia0-f171.google.com with SMTP id k27so4889939iad.16 for ; Mon, 10 Dec 2012 06:51:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; bh=sXjSbHDvi/htRZIJKWjGccGBFsCauP8vkA7x+2SlSlU=; b=sIrQZ1rZJqryC1fnUU/oXC44XshBQVvJtpoxmjpF+gPHDnbww8cUqgG1XuGIQcUxJ3 wnIYOWuljrNWb4wzfQugP8o7hcusN9uR8bX2bRgJYXwC2hphKxF2Qyf94eRAsqa7LDxF zY/pcPD9CE8sxHBy1xCuBbD9KvEgABhHxS5j74aGHkUQmetwJsEO+eYErODYb8QggOYJ GBMNnqeusMsADOuxbr4VcIXtngkPTLBOsKnO6LNTkutpf/OqhIbMTvmsVd3lG13E9pHA 29tQfiYegfpWVoWzixR7hLUj6iYC8alvw+zFzKPymCETEHvt5/j7hAUodgETGr2TH4Sr xfgA== MIME-Version: 1.0 Received: by 10.42.215.10 with SMTP id hc10mr11269940icb.19.1355151104151; Mon, 10 Dec 2012 06:51:44 -0800 (PST) Received: by 10.64.135.39 with HTTP; Mon, 10 Dec 2012 06:51:44 -0800 (PST) In-Reply-To: <50C5F4D7.10509@openwrt.org> References: <24882.1355094243@obiwan.sandelman.ca> <5601.1355149391@obiwan.sandelman.ca> <50C5F4D7.10509@openwrt.org> Date: Mon, 10 Dec 2012 15:51:44 +0100 Message-ID: From: Dave Taht To: Steven Barth Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: cerowrt-users , Simon Kelley , Michael Richardson Subject: Re: [Cerowrt-users] IPv6 router advertisements on custom interfaces X-BeenThere: cerowrt-users@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: Support for user problems regarding cerowrt List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 10 Dec 2012 14:51:45 -0000 On Mon, Dec 10, 2012 at 3:42 PM, Steven Barth wrote: > For OpenWrt, npt66 won't be the default method - instead the default shou= ld > be to split up the WAN prefix to distribute to downstream interfaces and > fallback to relaying if there are no prefixes. > > I personally think npt66 would not make much sense outside of multi-uplin= k > situations at least for plain OpenWrt, I cannot speak for CeroWrt. My concern is explained by example. I'm a fire department in the path of hurricane sandy. Power goes out. I have a 7 day public ipv6 lease from a provider like comcast. A team of volunteers get on bicycles connected to generators to keep the servers and radios up and connected to the outside world. Power stays out for 3 weeks. The public lease expires in 1 week. Power flickers on, briefly. 40,000 users all apply for a new ipv6 lease at the same time. The lease changes. Power goes out.... the network tries to renumber but has only partial connectivity... power comes back on... lease changes again... the box in the corner that controls the satellite uplink doesn't get a message and loses connectivity entirely... people die. I am making no long term design decisions vs a vs npt66 at this point... but I have a strong bias towards only using ipv6 addresses on an internal net that are as constant as the universe, and as constant as ipv4 nat. Period. Lest you think this is not a viable scenario, (although I would hope hurricane sandy is high in many minds).... power in nicaragua flickers 6 times a day.... > > > > On 10.12.2012 15:23, Michael Richardson wrote: >>>>>>> >>>>>>> "Dave" =3D=3D Dave Taht writes: >> >> Dave> Also planned is to (once the 3.7 kernel lands) make npt66 the >> default >> Dave> (for most users). So in a couple weeks, all the underlying ip= v6 >> Dave> infrastructure in openwrt and cerowrt is going to change. >> >> Pardon? >> > --=20 Dave T=E4ht Fixing bufferbloat with cerowrt: http://www.teklibre.com/cerowrt/subscribe.= html