Hi Dacheng I read your draft and I don't think it can get the information that you claim it does.
For example you have ingress interface TLV to record the ingress port of the ingress PE. First of all this interface is already communicated by the controller to the Ingress PE. Secondly if you want to test the Correct IP forwarding you can just use BFD for the outer IP. If you like to use UDP, you could do BFD over UDP over IP. Thirdly, your draft can't get the egress interface information of the egress PE, since there is nothing (No MAC or IP address) in your VXLAN payload that can be forwarded by the egress PE to the egress interface. Fourthly the path trace that you describe does not work. How does an intermediate router know it has to send a copy of this packet to CPU? The only method is to use TTL expiry, which already exists in IP trace route. Lastly this packet format (having a 128 byte dummy header) is not practical at all. Any header field deeper than 128 byte is not accessible by almost any HW parser. Regards, Shahram On Jun 26, 2015, at 10:15 PM, Dacheng Zhang <[email protected]<mailto:[email protected]>> wrote: Dear chairs: Can we get a time slot during the nvo3 session in Prague to discuss this draft? Dapeng Liu from Alibaba will be the presenter. 15 minutes would be good enough. Cheers Dacheng 发件人: Dapeng Liu <[email protected]<mailto:[email protected]>> 日期: 2015年6月21日 星期日 上午1:04 至: <[email protected]<mailto:[email protected]>> 主题: [nvo3] New draft: Path Detection in VXLAN Overlay Network Hello all, We have submitted a draft for path detection in VXLAN overlay network. http://datatracker.ietf.org/doc/draft-pang-nvo3-vxlan-path-detection/ The draft proposes a method for path detection in VXLAN network and it defines the path detection packet format by using one reserve bit in the VXLAN header. Comments & suggestions are welcomed. -- Dapeng Liu _______________________________________________ nvo3 mailing list [email protected]<mailto:[email protected]> https://www.ietf.org/mailman/listinfo/nvo3 _______________________________________________ nvo3 mailing list [email protected]<mailto:[email protected]> https://www.ietf.org/mailman/listinfo/nvo3
_______________________________________________ nvo3 mailing list [email protected] https://www.ietf.org/mailman/listinfo/nvo3
