IS-IS Support For The Power Conserving Path Placement Strategy (PCPPS)#

Colby Barth (Juniper), Tony Li, Vishnu Pavan Beeram, Ron Bonica (HPE).

• Why: Not AI, not identity — but the signal that energy is entering the IGP standards track. PCPPS inverts usual traffic engineering: concentrate traffic onto a small set of links so the rest can be powered down until needed.
• What: The IS-IS encoding for the power-state information that I-D.many-teas-power-steering's Power Conserving Path Placement Strategy needs distributed by an IGP. Notably, this individual draft has since been replaced by draft-ietf-lsr-pcpps with a call for WG adoption issued — i.e., LSR picked it up right after this meeting.
• How: IGP advertisement of the information a PCPPS computation needs to know which resources can be safely idled. (Write-up from the abstract and datatracker status; no slides were available.)
• Where applicable: WAN/operator networks where energy cost is a first-order routing input. Interesting tension with the AI-fabric work elsewhere in this digest, which wants maximum parallelism, not consolidation — expect the two objectives to collide in DC design discussions.