Session Date/Time: 24 Jul 2023 22:30

pce

Summary

The PCE working group session covered a range of topics, including updates on existing documents, a discussion on charter updates, and presentations on several draft proposals. Key discussions revolved around SR policy extensions, SRv6 extensions, algorithmic constraints in PCEP, and auto-bandwidth adjustments. Decisions were made to remove certain features from one draft and to move forward with a working group last call for another. The charter update was considered ready to be sent to the IESG.

Key Discussion Points

SR Policy Extensions (Mike Kodyshev):
- Discussion on whether to include backup segment list functionality in the SR policy extensions draft, given that SR policy architecture uses segment lists for load balancing, not active/backup.
- Agreement that the draft should focus on features within the SR policy architecture.
- The suggestion to remove the backup segment list section was made.
- Discussion of Stateful Bring Up and RFC 8231 updates.
- Consideration of reusing existing TLVs instead of creating a new SR Policy Capability TLV.
SRv6 Extensions (Charlie):
- Discussion around the MSD (Maximum SID Depth) and the X flag in the SRv6 extension draft.
- The working group was polled for implementation experience with the X flag.
- Agreement to resolve the MSD concerns.
Algorithmic Constraints in PCEP (Samil):
- An update on the significant changes in the latest draft version.
- Discussion about the number of authors exceeding the limit, with a decision to address it in the next version.
SRv6 Egress Node State (Zach):
- Presentation on specifying the state of the egress node in SRv6 policies.
- Concern raised regarding the impact on the forwarding efficiency.
- Suggestion to check with the Spring working group to get input.
Candidate Path Validity Criteria (Zach):
- Presentation on defining mechanisms for signaling the validity parameters of candidate paths for SR policies.
- Discussion comparing it with a similar solution in the Spring working group called "flexible candidate paths."
- Concerns were raised to align TLV types with PSAP.
Auto-Bandwidth Adjustments (Dhruv):
- Presentation on addressing an issue with removing attributes in auto-bandwidth configurations.
- Proposal to use a special "all zeros" value to indicate restoring to default or removing an attribute.
- Discussion on backwards compatibility using a new flag.
TLS 1.3 Support (Sean Turner):
- Request to prioritize the working group last call for the TLS 1.3 support draft.
- Confirmation that the draft mirrors a draft in NetComm and is close to IESG submission.

Decisions and Action Items

SR Policy Extensions:
- Action: Mike Kodyshev to remove the backup segment list section from the SR policy extensions draft.
- Action: Mike Kodyshev to use the metadata in the draft to clarify RFC 8231 update.
- Action: Mike Kodyshev to consider reusing existing TLVs or creating a new SR Policy Capability TLV.
SRv6 Extensions:
- Action: Authors to resolve the MSD concerns.
- Action: Working group to provide feedback on the X flag via the mailing list.
Algorithmic Constraints in PCEP:
- Action: Samil to address the author limit in the next version of the draft.
SRv6 Egress Node State:
- Action: Authors to consult with the Spring working group and revisit the design with NAI.
Auto-Bandwidth Adjustments:
- Working Group needs to decide whether to fix the identified issue.
TLS 1.3 Support:
- Decision: The chairs will place the TLS 1.3 support draft on the queue for working group last call.
Charter Update:
- Decision: The charter update will be sent to the IESG.

Next Steps

Authors to address the action items outlined above.
Working group to provide feedback on open issues via the mailing list.
Chairs to initiate working group last calls for documents nearing completion.
Chairs to send the charter update to the IESG.