VIAVI Launches Ultra Ethernet Transport Validation Platform
VIAVI Solutions introduced what it describes as the industry’s first Ultra Ethernet Transport (UET) validation solution for AI fabrics, extending ...
In Focus: MRC
| 🔗 Multi-path Reliable Connections (MRC) Open Transport Protocol for AI Ethernet Fabrics | |
| Multi-path Reliable Connections (MRC) is an open transport protocol developed by an industry consortium led by OpenAI and contributed to the Open Compute Project (OCP). MRC redesigns Ethernet transport for hyperscale AI clusters by enabling host-side per-packet multipathing, congestion-aware retransmission, hardware-assisted reliability, and PFC-free operation across large GPU fabrics. | |
| Why It Matters | Frontier AI workloads require high bisection bandwidth, predictable latency, and rapid recovery from congestion or link failures. MRC moves path control into the host transport layer, allowing packets to be sprayed across multiple paths while reducing ECMP collisions, improving utilization, and limiting the impact of fabric failures. |
| Category | AI Fabrics • Ethernet Transport • Multipath Networking • Scale-Out AI |
| Key Capabilities | Host-side packet spraying • Remote Extended Transport Header (RETH) • Selective ACK/NACK recovery • Hardware packet trimming • SRv6 source routing • PFC-free Ethernet • Congestion-window control • Microsecond-scale retransmission |
| Coverage | AI Infrastructure • Ethernet Fabrics • RoCEv2 Evolution • Ultra Ethernet • SRv6 • Packet Trimming • GPU Networking • Hyperscale AI Clusters |
| Related Technologies | Ultra Ethernet • Ethernet • RDMA • RoCE • AI Infrastructure |
| Related Organizations | Open Compute Project (OCP) • Ultra Ethernet Consortium (UEC) |
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