Example for Configuring OSPF and GRE Over IPSec to Implement Communication Between the Branch and Headquarters - AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 CLI-based Typical Configuration Examples -
Fundamentals of OSPF - S7700 and S9700 V200R010C00 Configuration Guide - IP Unicast Routing - Huawei
OSPF Network Design Deployment Case - S600-E V200R011C10 Configuration Guide - IP Unicast Routing - Huawei
Example for Configuring OSPF-BGP Synchronization - S7700 and S9700 V200R011C10 Configuration Guide - IP Unicast Routing - Huawei
![Rebuild the topology based on OSPF LSDB-Series of OSPF Episode 5 - Huawei Enterprise Support Community Rebuild the topology based on OSPF LSDB-Series of OSPF Episode 5 - Huawei Enterprise Support Community](https://forum.huawei.com/huaweiconnect/data/attachment/forum/201811/30/180537hdgudieeddzjgmgt.png)