SRv6 uSID: Deterministic AI Backend Networking and Unified DC Frontend Design#

Alberto Donzelli — the slides filename ("Cisco-final") indicates a Cisco-affiliated session; treat as a vendor-informed design pattern, not a neutral case study

• Why: AI backend networks are the hottest fabric-design problem right now (deterministic, lossless behavior for collective/parallel traffic) — squarely in the PM's RDMA/lossless-fabric interest.
• What: A design combining SRv6 micro-segment (uSID) networking for AI backend traffic with a unified frontend/DC architecture. (title only)
• How: uSID compresses many segments into a single IPv6 address for fine-grained steering; the claim to verify in the deck is how SRv6 delivers "deterministic" backend behavior and how frontend and backend unify under one addressing scheme.
• Where applicable: Requires SRv6/uSID-capable silicon and NOS, so the mechanism is partially vendor/silicon-bound; the AI-backend problem framing transfers across the industry.