https://darrenqu.net/tags/evpn/Technical writing on network engineering: campus and WAN, hybrid cloud interconnect, automation and observability, and the data center fabrics — InfiniBand, RoCE, Spectrum-X — underneath GPU clusters.Hugoen-USDarren QuDarren Qu2026 Darren QuWed, 16 Sep 2026 00:00:00 +0000https://darrenqu.net/ai-networking/evpn-multihoming-across-vendors-part-2/Wed, 16 Sep 2026 00:00:00 +0000https://darrenqu.net/ai-networking/evpn-multihoming-across-vendors-part-2/AI NetworkingevpnThe control plane agrees on the Designated Forwarder and the host still receives every broadcast twice. Multi-point captures, a same-vendor control group, and a packet capture that was quietly lying.https://darrenqu.net/ai-networking/evpn-multihoming-across-vendors-part-1/Wed, 16 Sep 2026 00:00:00 +0000https://darrenqu.net/ai-networking/evpn-multihoming-across-vendors-part-1/AI NetworkingevpnFour leaves, two vendors, one Ethernet Segment. Five configuration differences between Cumulus and Arista stand between the RFC and a working all-active bond — four get solved here, and none of them are in the RFC.