Hi Gyan, Thanks for sharing your thoughts on this document.
I agree with you that in this document the semantics of the existing SR SIDs (the topological SIDs in your text) are extended to “topology/function + resource”, thus the forwarding behavior of the resource-aware SIDs will be a little bit different from the normal SID. While the encoding of the SR SIDs are still unchanged. This may be a subtle change/update to SR, while it would be good if this could be reflected by the document type. As for the control plane mechanisms to advertise the resource-aware SIDs and their associated resource attributes, there can be either solutions which reuse existing protocol mechanisms, or protocol extensions may be introduced for the enhancements of capability for some scenarios. That has been discussed in TEAS and the corresponding control protocol WGs, and hopefully that discussion will continue there. Hope this helps to align our understanding on this document. Best regards, Jie From: Gyan Mishra [mailto:hayabusa...@gmail.com] Sent: Tuesday, January 23, 2024 2:02 PM To: Dongjie (Jimmy) <jie.dong=40huawei....@dmarc.ietf.org> Cc: Alexander Vainshtein <alexander.vainsht...@rbbn.com>; draft-ietf-spring-resource-aware-segme...@ietf.org; spring@ietf.org Subject: Re: [spring] Intended status of draft-ietf-spring-resource-aware-segments Hi Jie I understand the draft proposes an extension to existing topological SIDs to carry the resource attributes. However since this draft proposes a new resource attributes extension encoding to existing topological SIDs I agree this should be standards track. Since the topological segments are advertised by IGP OSPF or ISIS, I am guessing you would have a standards track draft in LSR that encodes the resource segments and could update the existing SR-MPLS and SRv6, OSPF and ISIS RFCs / drafts. You could possibly mention the proposed encoding scheme and fields and that detail would be integrated into the IGP draft. Another option would be to introduce new resource aware SIDs that is NRP centric that would be applicable to both SR-MPLS and SRv6 but would be independent of topological or service SID so not at that layer. The resource SID would be associated with the BSID that binds the single or multiple candidate path to the forwarding plane and instantiates the path. So for SR-MPLS it would be the entire label stack pushed onto the packet when the BSID is popped. For SRv6 it would be SRH segment list associated with the candidate paths. In this option you would have a standards track draft in LSR that encodes the resource segments and could update the existing SR-MPLS and SRv6, OSPF and ISIS RFCs / drafts. The contents of the resource SID would now apply to the NRP and would be as you described, buffers, queues, bandwidth, SLO and SLE parameters such as latency and jitter for NRP network slice. Kind Regards [图像已被发件人删除。]<http://www.verizon.com/> Gyan Mishra Network Solutions Architect Email gyan.s.mis...@verizon.com<mailto:gyan.s.mis...@verizon.com> M 301 502-1347 On Mon, Jan 22, 2024 at 3:39 AM Dongjie (Jimmy) <jie.dong=40huawei....@dmarc.ietf.org<mailto:40huawei....@dmarc.ietf.org>> wrote: Hi Sasha, Thanks for the review and comment on this document. Although this draft does not introduce new SR segment type/SRv6 behavior, there is change in the semantics and forwarding behavior of the resource-aware segments, as each resource-aware SIDs identifies a subset of the network resources used for packet processing. Thus the authors consider this document belong to standard track. That said, the usage of IETF keywords in current version needs to be revisited and adjusted if needed. Of course we would like to hear the opinions from the WG participants, and follow the decision of the WG. Best regards, Jie From: spring [mailto:spring-boun...@ietf.org] On Behalf Of Alexander Vainshtein Sent: Sunday, January 21, 2024 2:16 PM To: draft-ietf-spring-resource-aware-segme...@ietf.org<mailto:draft-ietf-spring-resource-aware-segme...@ietf.org> Cc: spring@ietf.org<mailto:spring@ietf.org> Subject: [spring] Intended status of draft-ietf-spring-resource-aware-segments Hello, I have read the draft<https://datatracker.ietf.org/doc/html/draft-ietf-spring-resource-aware-segments-08>, and I do not have any technical comments on it. At the same time, I wonder why its intended status appears as “Standard Track”: 1. The draft does not define any new mechanisms in the data plane or control plane 2. Usage of the IETF keywords denoting requirement levels looks too vague/generic to me, e.g. a. The details of the underlay network MUST NOT be exposed to third parties, to prevent attacks aimed at exploiting shared network resources b. If there are related link advertisements, then consistency MUST be assured across that set of advertisements IMHO and FWIW the draft describes how resource-aware forwarding can be achieved using various already-defined SR mechanisms. Have the authors and/or the WG considered changing the intended status of the draft to “Informational”? Regards, Sasha Disclaimer This e-mail together with any attachments may contain information of Ribbon Communications Inc. and its Affiliates that is confidential and/or proprietary for the sole use of the intended recipient. Any review, disclosure, reliance or distribution by others or forwarding without express permission is strictly prohibited. If you are not the intended recipient, please notify the sender immediately and then delete all copies, including any attachments. _______________________________________________ spring mailing list spring@ietf.org<mailto:spring@ietf.org> https://www.ietf.org/mailman/listinfo/spring
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