In this podcast, the hosts delve into the advancements and hurdles of implementing EVPN multi-homing within SONiC, an open-source network operating system. The project, which has seen collaboration from Broadcom and Cisco, has produced a High-Level Design (HLD) that is now ready for review. The focus of the implementation is on Layer 2 ECMP, tackling issues like ARP/ND synchronization and managing broadcast and multicast traffic through methods such as designated forwarders and split horizon. Although the current BGP-based method experiences slow convergence, future efforts will aim to explore quicker rerouting techniques to enhance performance. This positions EVPN multi-homing as a potential service offering that could replace MCLAG in IP fabric deployments. The speakers encourage listeners to get involved with the SONiC routing workgroup and to review the HLD and code available.
