Wednesday 22 July 2026
Room: Grand Park Hall 1
9:00 - 11:00, Local
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Presenter: Bala'zs Varga
draft-ietf-spring-sr-redundancy-protection
no comments from the community
Bruno: When to have the next version?
Bala'zs: End of summer
Bruno: We will check the latest verion and may do another call.
Presenter: Shengnan Yue
draft-ietf-spring-sr-policy-nrp
Zafar Ali: Another CP level is an issue.
Jie Dong: In the draft we show that it is valid to have NRPID associated
with different CPs.
Zafar Ali: It is difficult for the hardware to switch NRPID on the fly.
Joel: Zafar, you ask for NRPID or NRP selector ID?
Zafar Ali: I ask from the hardware perspective.
Jie: Add as a policy-level attribute?
Zafar: Yes, more discussions offline.
Jie: We can discuss how to describe it in the architecture draft.
Presenter: Ahmed Abdelsalam
draft-ietf-spring-srv6-service-programming
no comments from the community
Alvaro: Please pay attention to the draft since it will unlock the YANG
models. Please review.
Presenter: Feng Yang
draft-yang-spring-sid-as-source-address
Daniel Bernier: A few other usecases, such as optimizing Reverse Path
Forwarding (RPF) for Service Function Chaining (SFC) and return path
optimization, will contact offline.
Presenter: Andrew Stone
draft-stone-spring-mpte-sr
Bruno: Extensions to PCEP or BGP?
Andrew: At this moment no.
Chris Martin: how downstream path failures are communicated to the
headend.
Andrew: SBFD runs independently on downstream junction nodes and
cascades back. If all outgoing paths of a junction node fail, the node
stops processing the binding SID, triggering the upstream node's SBFD
session to fail.
Chris Martin: Align the SBFD behavior with ongoing work on BFD strict
mode additions.
Himanshu Shah: whether a centralized DAG computation is necessary when
nodes could compute paths locally using FlexAlgo and ECMP.
Andrew Stone: When routing off the shortest path to spread traffic, the
path explosion makes ingress-only representation unscaleable. A DAG
efficiently compresses these paths across intermediate junction nodes.
Sue Hares: Please sync, so we can feed into BGP.
Bruno: In terms of adoption, we will wait for the progress of the
architecture in the TEAS WG.
Presenter: Balazs Varga / Zafar Ali
draft-varhal-6man-icmp-srv6-vpn
Bruno: We want to discuss requirements but too much details on the
solution.
Sasha Vainshtein: How a P-node would handle layer 2 VPN services.
Zafar Ali: When an exception occurs, the packet goes to the slow path,
which determines the appropriate forwarding action based on local policy
and packet content.
Joel: As a co-author, we need to get agreement on this merged approach,
after which the working group can determine which components fall under
SPRING versus 6man.
Presenter: Yao Liu
draft-liu-spring-srv6-bsid-relay
Joel: Slide 4, whether the headend receiving the relayed ICMPv6 packet
would be confused by receiving error messages for outer headers it did
not generate.
Zafar: The merged ICMP error handling proposal solves this without
requiring new relay states.
Yao Liu: It describes a generic P-node ping/trace behavior.
Daniel Bernier: Merge this work as a specific flavor or use case within
the SID source address draft to avoid creating separate independent
specifications.
Presenter: Feng Yang
draft-yang-spring-srv6-verification
no comments from the community
Presenter: Zhengxin Han
draft-ruan-spring-priority-flow-control-sid
no comments from the community
Presenter: Cancan Huang
draft-song-spring-pppoe-srv6
Daniel Bernier: Whether using PPPoE over SRv6 is necessary when PPP over
SRv6 could be run directly. Suggested bringing the subscriber steering
requirements to the Broadband Forum (BBF).
Sasha Vainshtein: Slide 7. Typo or mistake? PPPoE is an EtherType inside
the Ethernet frame rather than an upper-layer header type in SRv6. PPPoE
has been successfully carried over MPLS pseudowires for two decades
without requiring special pseudowire types.
Joel: Talk about potential deployment. Please dont talk about revenue,
cost, and profit.