Hi Jie, > [Jie] The forwarding plane need to support some mechanism for the partitioning of network resources,
Is this hard partitioning (waste of resources if not used) or soft one (resource sharing) across a number of different resource aware SIDs ? > [Jie] If there are non-SR transit nodes in the network, they just support best-effort forwarding, So I think the draft should make it cristal clear that this only makes sense in hop by hop SR paths. > [Jie] This document defines the resource-aware SID mechanism and the data plane behavior Well honestly I am afraid it does not. For example what I find missing is description of coexistence with current QoS mechanisms based on diffserv model. Thx, R. On Wed, May 8, 2024 at 4:15 AM Dongjie (Jimmy) <jie.d...@huawei.com> wrote: > Hi Robert, > > > > Thanks for your review and comments, please see some replies inline: > > > > *From:* Robert Raszuk [mailto:rob...@raszuk.net] > *Sent:* Tuesday, May 7, 2024 4:06 PM > *To:* SPRING WG <spring@ietf.org> > *Subject:* [spring] Fwd: I-D Action: > draft-ietf-spring-resource-aware-segments-09.txt > > > > Dear Authors & Contributors of draft-ietf-spring-resource-aware-segments, > > > > I have few questions in respect to your proposal: > > > > #1 - If you say that DiffServ mechanism is not sufficient to handle data > plane processing across the nodes are you envisioning that new forwarding > hardware will be needed (or upgrade to the existing one if programmable) to > take into forwarding decision resource aware SIDs ? > > > > [Jie] The forwarding plane need to support some mechanism for the > partitioning of network resources, and associate different subset of the > resources with resource-aware SIDs. This can be done either by hardware > upgrade (e.g. FlexE), or it can be achieved by firmware or software upgrade > (e.g. associate dedicated sub-interfaces/queues with resource-aware SIDs). > > > > #2 - As you know SR is not required at non SR capable nodes and SR segment > can often span multiple nodes. How are you going to protect your resources > in non SR transit nodes ? > > > > [Jie] If there are non-SR transit nodes in the network, they just support > best-effort forwarding, in this case resource cannot be guaranteed. If the > transit nodes are SR capable, and they also support resource-aware > segments, resource can be guaranteed. > > > > #3 - Document says that signalling resource aware SIDs and resources > associated with it is out of scope, how are you planning to propagate > resource utilization at least between segment nodes and controller (PCE) ? > > > > [Jie] This document defines the resource-aware SID mechanism and the data > plane behavior, the control plane mechanisms are specified in other > accompanying drafts. For example, the resource information and the > associated SR SIDs can be distributed to the controller using BGP-LS. > > > > Best regards, > > Jie > > > > > > Many thx, > > Robert > > > > ---------- Forwarded message --------- > > From: <internet-dra...@ietf.org> > Date: Tue, May 7, 2024 at 5:11 AM > Subject: I-D Action: draft-ietf-spring-resource-aware-segments-09.txt > To: <i-d-annou...@ietf.org> > Cc: <spring@ietf.org> > > > > Internet-Draft draft-ietf-spring-resource-aware-segments-09.txt is now > available. It is a work item of the Source Packet Routing in Networking > (SPRING) WG of the IETF. > > Title: Introducing Resource Awareness to SR Segments > Authors: Jie Dong > Takuya Miyasaka > Yongqing Zhu > Fengwei Qin > Zhenqiang Li > Name: draft-ietf-spring-resource-aware-segments-09.txt > Pages: 13 > Dates: 2024-05-06 > > Abstract: > > This document describes the mechanism to associate network resources > to Segment Routing Identifiers (SIDs). Such SIDs are referred to as > resource-aware SIDs in this document. The resource-aware SIDs retain > their original forwarding semantics, but with the additional > semantics to identify the set of network resources available for the > packet processing and forwarding action. The resource-aware SIDs can > therefore be used to build SR paths or virtual networks with a set of > reserved network resources. The proposed mechanism is applicable to > both segment routing with MPLS data plane (SR-MPLS) and segment > routing with IPv6 data plane (SRv6). > > The IETF datatracker status page for this Internet-Draft is: > https://datatracker.ietf.org/doc/draft-ietf-spring-resource-aware-segments/ > > There is also an HTMLized version available at: > > https://datatracker.ietf.org/doc/html/draft-ietf-spring-resource-aware-segments-09 > > A diff from the previous version is available at: > > https://author-tools.ietf.org/iddiff?url2=draft-ietf-spring-resource-aware-segments-09 > > Internet-Drafts are also available by rsync at: > rsync.ietf.org::internet-drafts > > > _______________________________________________ > I-D-Announce mailing list -- i-d-annou...@ietf.org > To unsubscribe send an email to i-d-announce-le...@ietf.org >
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