Huawei Technologies Huawei Technologies Huawei Technologies This document defines a new BGP Address Family, termed the Secure Session Synchronization Address Family, allowing BGP speakers to exchange stateful firewall, NAT, and IPSec session information across distributed nodes. This architecture facilitates zero-packet-loss failover and seamless path protection for Secure SD-WAN, SASE, and SSE multi-POP deployments, entirely bypassing the scalability limits of traditional layer-2 synchronization protocols.