LAG and Hardware Offload to Support RDMA and IO Virtualized Interfaces

Explore advanced networking techniques for Link Aggregation (LAG) and hardware offload in support of RDMA and IO virtualized interfaces in this Linux Plumbers Conference talk. Delve into alternative approaches to implementing LAG functionality for stateful offloads and IO virtualization, focusing on software-based solutions with minimal hardware and firmware support. Examine the implementation of active-backup mode for RDMA and virtual functions, the use of RX hash values for flow-based active-active mode, and a new active-active mode for virtual functions. Gain insights into how these techniques can enhance network performance and flexibility while maintaining compatibility with existing hardware.

Introduction
Link aggregation
Hardware acceleration
Detail solution
Switch roles
Physical functions
Visual functions
Problem with RDMA
Conclusions
Questions
Legacy solution
Generic part alone
Better model
Bonding
Bonding for VMs