Fine. In my draft, both intra-subnet and inter-subnet IP traffic are forwarded at layer3 while in the draft you mentioned below only inter-subnet traffic would be forwarded at layer3. They are totally different approaches and therefore it's meaningless to say which one is easier or not.
Xiaohu > -----邮件原件----- > 发件人: Henderickx, Wim (Wim) [mailto:[email protected]] > 发送时间: 2013年11月25日 19:16 > 收件人: Xuxiaohu; [email protected] > 抄送: [email protected] > 主题: Re: 答复: 答复: 答复: New Version Notification for > draft-xu-l3vpn-virtual-subnet-02.txt > > Lets debate the technical solutions iso blogs. > > On 25/11/13 08:52, "Xuxiaohu" <[email protected]> wrote: > > >I suggest you read the following blog post by Yakov > >(http://opencontrail.org/why-contrail-is-using-bgpmpls/). > > > >> -----邮件原件----- > >> 发件人: Henderickx, Wim (Wim) > [mailto:[email protected]] > >> 发送时间: 2013年11月25日 15:27 > >> 收件人: Xuxiaohu; [email protected] > >> 抄送: [email protected] > >> 主题: Re: 答复: 答复: New Version Notification for > >> draft-xu-l3vpn-virtual-subnet-02.txt > >> > >> There are easier ways to do this which don’t required data-plane > >>changes. > >> > >>https://tools.ietf.org/html/draft-sajassi-l2vpn-evpn-inter-subnet-forw > >>ard > >>in > >> g-02 > >> > >> On 25/11/13 07:40, "Xuxiaohu" <[email protected]> wrote: > >> > >> > > >> > > >> >> -----邮件原件----- > >> >> 发件人: Henderickx, Wim (Wim) > >> [mailto:[email protected]] > >> >> 发送时间: 2013年11月25日 14:29 > >> >> 收件人: Xuxiaohu; [email protected] > >> >> 抄送: [email protected] > >> >> 主题: Re: 答复: New Version Notification for > >> >> draft-xu-l3vpn-virtual-subnet-02.txt > >> >> > >> >> It is not about TTL 1, no TTL decrement should happen for > >> >>intra-subnet forwarding at all On top you need to modify the > >> >>data-plane to achieve this, since it now needs to find out if it > >> >>is intra or inter subnet where current PE(s) don’t have to do this. > >> > > >> >Sure, it needs some change to the implementation of PE routers. > >> >That's why we need a draft to specify the implementation requirements. > >> > > >> >> On 25/11/13 07:22, "Xuxiaohu" <[email protected]> wrote: > >> >> > >> >> >Wim, > >> >> > > >> >> >It said clearly "if the source and destination addresses of a > >> >> >packet whose TTL is set to 1 belong to the same extended subnet, > >> >> >both ingress and egress PE routers MUST NOT decrement the TTL of > >> >> >such packet." Did you doubt that the PE routers could know > >> >> >whether the source and destination address belong to the same > extended subnet? > >> >> > > >> >> >Xiaohu > >> >> > > >> >> >> -----邮件原件----- > >> >> >> 发件人: Henderickx, Wim (Wim) > >> >> [mailto:[email protected]] > >> >> >> 发送时间: 2013年11月25日 14:08 > >> >> >> 收件人: Xuxiaohu; [email protected] > >> >> >> 抄送: [email protected] > >> >> >> 主题: Re: New Version Notification for > >> >> >>draft-xu-l3vpn-virtual-subnet-02.txt > >> >> >> > >> >> >> On the TTL issue I believe this is not addressing the issue. We > >> >> >>can say don’t decrement but when and how will the PE(s) do or > >>don’t. > >> >> >> > >> >> >> On 25/11/13 03:22, "Xuxiaohu" <[email protected]> wrote: > >> >> >> > >> >> >> >Hi all, > >> >> >> > > >> >> >> >Major changes since the -01 version include: > >> >> >> > > >> >> >> >1) add a section about TTL consideration; > >> >> >> >2) remove the section of PE Router FIB Reduction; > >> >> >> >3) remove the section of PE Router RIB Reduction; > >> >> >> > > >> >> >> >Any further comments are welcome. BTW, the removed sections as > >> >> >> >mentioned above would be described in separate docs. > >> >> >> > > >> >> >> >Best regards, > >> >> >> >Xiaohu > >> >> >> > > >> >> >> >> -----邮件原件----- > >> >> >> >> 发件人: [email protected] > >> >> >> >>[mailto:[email protected]] > >> >> >> >> 发送时间: 2013年11月25日 10:10 > >> >> >> >> 收件人: Brendan Fee; Susan Hares; Fan Yongbing; Xuxiaohu; > >> >> >> >>Xuxiaohu; Christian Jacquenet; Truman Boyes; Yongbing Fan > >> >> >> >> 主题: New Version Notification for > >> >> >> >>draft-xu-l3vpn-virtual-subnet-02.txt > >> >> >> >> > >> >> >> >> > >> >> >> >> A new version of I-D, draft-xu-l3vpn-virtual-subnet-02.txt > >> >> >> >> has been successfully submitted by Xiaohu Xu and posted to > >> >> >> >>the IETF repository. > >> >> >> >> > >> >> >> >> Filename: draft-xu-l3vpn-virtual-subnet > >> >> >> >> Revision: 02 > >> >> >> >> Title: Virtual Subnet: A L3VPN-based Subnet Extension > >>Solution > >> >> >> >> Creation date: 2013-11-25 > >> >> >> >> Group: Individual Submission > >> >> >> >> Number of pages: 13 > >> >> >> >> URL: > >> >> >> >> > >> >> >>http://www.ietf.org/internet-drafts/draft-xu-l3vpn-virtual-subne > >> >> >>t-0 > >> >> >>2.t > >> >> >>xt > >> >> >> >> Status: > >> >> >> >>http://datatracker.ietf.org/doc/draft-xu-l3vpn-virtual-subnet > >> >> >> >> Htmlized: > >> >> >> >>http://tools.ietf.org/html/draft-xu-l3vpn-virtual-subnet-02 > >> >> >> >> Diff: > >> >> >> >> > >> >> >> >>http://www.ietf.org/rfcdiff?url2=draft-xu-l3vpn-virtual-subne > >> >> >> >>t-0 > >> >> >> >>2 > >> >> >> >> > >> >> >> >> Abstract: > >> >> >> >> This document describes a Layer3 Virtual Private Network > >> >>(L3VPN)- > >> >> >> >> based subnet extension solution referred to as Virtual > >> >> >> >> Subnet, > >> >> >>which > >> >> >> >> can be used as a kind of Layer3 network virtualization > >>overlay > >> >> >> >> approach for data center interconnect. > >> >> >> >> > >> >> >> >> > >> >> >> >> > >> >> >> >> > >> >> >> >> Please note that it may take a couple of minutes from the > >> >> >> >>time of submission until the htmlized version and diff are > >> >> >> >>available at tools.ietf.org. > >> >> >> >> > >> >> >> >> The IETF Secretariat > >> >> >> > > >> >> > > >> > > >
