OSPF interaction between Huawei AR router and Juniper Firewall
Establishing GRE over IPSec Tunnels Between HUAWEI Firewalls and HUAWEI AR Routers - HUAWEI USG Series Firewalls Interoperability Configuration Guide for VPN - Huawei
Configuring Cisco Stateful Interchassis Redundancy | NAT & Zone Based Firewall State Synchronization - YouTube