Optimizing AI-Ready WAN Infrastructure with Microsoft and Cisco - CSSENT-2100#
Cisco Live US 2025 (San Diego) digest Program Core pick San Diego · 8–12 June 2025
Sarav Subramanian (Microsoft), Ruben Lopes da Fonte (Cisco), Gaisin Rustam (Microsoft)
- Why: An end-user case study from Microsoft on deploying RDMA in the Azure WAN — extending lossless-network practice beyond the DC into the WAN, which few operators talk about publicly.
- What: How AI-ready infrastructure is being built in the Azure WAN using RDMA for high throughput, low latency, and lossless transfer with minimal CPU load, and the congestion-management strategies (Priority Flow Control, ECN) used to handle oversubscription and microbursts (from abstract only).
- How: RDMA across WAN infrastructure with PFC/ECN congestion control for microburst and oversubscription scenarios.
- Where applicable: Microsoft Azure WAN-specific setup. Joint vendor-customer session, so expect some marketing gloss, but the scenario — lossless behavior at WAN scale — is unusually candid territory for Microsoft to discuss.