Li, Please read https://mailarchive.ietf.org/arch/msg/spring/YCIGjvgPDwSibW2BjX7aXDLUQMc. I believe that should help you understand more.
Cheers, Pablo. From: spring <[email protected]> on behalf of li zhenqiang <[email protected]> Date: Tuesday, 15 October 2019 at 09:20 To: "Wang, Weibin (NSB - CN/Shanghai)" <[email protected]>, Ron Bonica <[email protected]>, "[email protected]" <[email protected]> Subject: [spring] 回复: Re: draft-ietf-spring-srv6-network-programming :Section 4.16.2 No, USD is not needed in my understanding. The destination node which is pointed by the DA in the outer IPv6 header knows what it should do when it receives a packet whose DA is in its local SID table. More discussion are needed for the flavor part in the draft. Best Regards, Zhenqiang Li ________________________________ [email protected] 发件人： Wang, Weibin (NSB - CN/Shanghai)<mailto:[email protected]> 发送时间： 2019-10-15 07:55 收件人： Ron Bonica<mailto:[email protected]>; SPRING WG List<mailto:[email protected]> 主题： Re: [spring] draft-ietf-spring-srv6-network-programming :Section 4.16.2 I think the USD action May be necessary, because it is relative to SRv6 SID as last SID in SRH, not to related to plain ipv6 address (RFC4291); As plain IPv6 address in DA field of IPv6 packet, it is default behavior for Node identified by DA to further Decapsulate packet in this case. -------------------------------------- Cheers ! WANG Weibin From: spring <[email protected]> On Behalf Of Ron Bonica Sent: 2019年10月15日 7:03 To: SPRING WG List <[email protected]> Subject: Re: [spring] draft-ietf-spring-srv6-network-programming :Section 4.16.2 Authors, Sorry, I meant to say USD, not USP. Ron Juniper Business Use Only From: Ron Bonica Sent: Monday, October 14, 2019 2:36 PM To: SPRING WG List <[email protected]<mailto:[email protected]>> Subject: draft-ietf-spring-srv6-network-programming :Section 4.16.2 Authors, The USP flavor of the END, END.X and END.T functions isn’t needed. USP is the default IPv6 behavior. So, if the source node specifies SID[0] as an RFC 4291 address on the SR egress node, you get the USP behavior for free. Ron Juniper Business Use Only
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