UCloud Tech
Apr 29, 2021 · Fundamentals
How DR and TUN Modes Optimize Load Balancer Performance
This article explains the limitations of NAT and FULLNAT load‑balancing models, introduces DR and TUN modes that let real servers reply directly to clients, and details the required ARP and loopback configurations to hide VIPs and reduce bottlenecks.
ARPDR modeNetworking
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