Hi Qiong, I see your point. So what is the difference between a lightweight AFTR and 4rd BR?
Cheers, Yiu From: Qiong <[email protected]<mailto:[email protected]>> Date: Tue, 2 Aug 2011 14:11:55 +0800 To: "Yiu L. LEE" <[email protected]<mailto:[email protected]>> Cc: Satoru Matsushima <[email protected]<mailto:[email protected]>>, "Jan Zorz @ go6.si" <[email protected]<mailto:[email protected]>>, "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Subject: Re: [Softwires] Clarification of the stateles/stateful discussion In our consideration, lightweight AFTR is not doing port-range routing. In this lightweight AFTR, it would firstly lookup a mapping table (recording [IPv6 address, IPv4 address, Port set]) for a downstream IPv4 packet. Then after IPv4 packet has been encapsulated into IPv6 packet, it will do IPv6 routing based on different IPv6 addresses. So, lightweight AFTR does not need to distribute port-set info into FIB and there is no impact on existing routing architecture between B4 and AFTR.
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