Ole,
On Thu, Nov 15, 2012 at 12:59 AM, Ole Trøan <[email protected]> wrote: > >> in MAP aggregated mode you have: > >> 1.1.1.0/24 -> 2001:db8:XXXX::/48 > > > > Actually, the so called 'aggregated mode' is original MAP-E, with IPv4 > address and PSID embedded in the EA-bits field in End user IPv6 prefix. Let > me try to explain what you have 'aggregated'. > > > > 1.1.1.1:01 -> 2001:db8:101::/48 (EA-bits: 0x101) > > 1.1.1.1:02 -> 2001:db8:102::/48 (EA-bits: 0x102) > > 1.1.1.1:03 -> 2001:db8:103::/48 (EA-bits: 0x103) > > . > > . > > . > > > > The IPv4 address and port set are the same in what you called 'MAP 1:1'. > However, the corresponding IPv6 addresses are totally different. Because > one uses MAP algorithm, the other doesn't. > > > > > > The original MAP-E achieves address sharing by embedding IPv4 suffix and > PSID into End User IPv6 prefix. But if the EA-bits is ZERO, PSID is also > ZERO. Nothing embedded in the IPv6 prefix. In this case, the so called 'MAP > 1:1' abandons the MAP algorithm and uses a per-subscriber stateful kind > method to achieve address sharing. That is NOT MAP-E. > > > > So I question why 'MAP-E 1:1' bears the MAP-E name. > > I really don't care what we call it. what we are talking about is simply > RFC2473 tunneling with extensions from RFC6346. > if you want to, please suggest whatever name you like. > > what I'm arguing against is that we need a separate RFC for the mechanism > if it uses a /48 versus if it uses a /40. > [Qiong] The reason here is that they are actually two mechanisms steps from different motivations and requirements. That's why they will result in two kinds of rules/binding/or ...with the same 'aggregated' IPv4 rule. Best wishes Qiong > > cheers, > Ole > _______________________________________________ > Softwires mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/softwires > -- ============================================== Qiong Sun China Telecom Beijing Research Institude Open source code: lightweight 4over6: *http://sourceforge.net/projects/laft6/* PCP-natcoord:* http://sourceforge.net/projects/pcpportsetdemo/ * ===============================================
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