Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753350AbaBYTvB (ORCPT ); Tue, 25 Feb 2014 14:51:01 -0500 Received: from mail-qa0-f44.google.com ([209.85.216.44]:40269 "EHLO mail-qa0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751044AbaBYTu7 (ORCPT ); Tue, 25 Feb 2014 14:50:59 -0500 MIME-Version: 1.0 In-Reply-To: <20140224.191238.921310808350170272.davem@davemloft.net> References: <1393266120.8041.19.camel@dcbw.local> <20140224.180426.411052665068255886.davem@davemloft.net> <1393286520.6823.123.camel@deadeye.wl.decadent.org.uk> <20140224.191238.921310808350170272.davem@davemloft.net> From: Paul Marks Date: Tue, 25 Feb 2014 11:50:38 -0800 Message-ID: Subject: Re: [RFC v2 2/4] net: enables interface option to skip IP To: David Miller Cc: ben@decadent.org.uk, dcbw@redhat.com, mcgrof@do-not-panic.com, zoltan.kiss@citrix.com, netdev@vger.kernel.org, xen-devel@lists.xenproject.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, kuznet@ms2.inr.ac.ru, jmorris@namei.org, yoshfuji@linux-ipv6.org, kaber@trash.net Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Feb 24, 2014 at 4:12 PM, David Miller wrote: > From: Ben Hutchings > Date: Tue, 25 Feb 2014 00:02:00 +0000 > >> You can run an internal network, or access network, as v6-only with >> NAT64 and DNS64 at the border. I believe some mobile networks are doing >> this; it was also done on the main FOSDEM wireless network this year. > > This seems to be bloating up the networking headers of the internal > network, for what purpose? The primary purpose of IPv6 is to bloat up network headers, because the IPv4 headers were too small to address all the endpoints. NAT64 is an intriguing solution to the problem of "I have too many customers for 10.0.0.0/8". Here's are some slides on the topic from this week's APNIC conference: https://conference.apnic.net/data/37/464xlat-apricot-2014_1393236641.pdf A kernel with disable_ipv4 would be fairly usable on such a network today, as long as you avoid AF_INET-specific apps. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/