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<mailto: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<mailto:i-d-annou...@ietf.org>> Cc: <spring@ietf.org<mailto: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<mailto:i-d-annou...@ietf.org> To unsubscribe send an email to i-d-announce-le...@ietf.org<mailto:i-d-announce-le...@ietf.org>
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