Key Takeaway (TL;DR): Cross-border e-commerce operations and remote software engineers cannot afford single points of network failure. Deploying dual physical WAN lines combined with MWAN3 and heterogeneous proxy provider fallback groups on OpenWrt/iStoreOS guarantees 99.99% operational continuity. Primary traffic routes through 2.5Gbps IEPL circuits, while secondary subscriptions automatically catch traffic if packet loss spikes.
1. Multi-WAN Architecture
Combine diverse ISPs (Telecom + Unicom) and multiple provider subscriptions via MWAN3 policy rules for seamless load aggregation and automated failover.