Method used to configure IPSec on the AR where NAT and OSPF are deployed

Huawei AR routers support IPSec tunnels in networking where NAT and OSPF are deployed. For details, see "Example for Configuring GRE Over IPSec to Implement Communication Between the Branches and Headquarters and NAT to Implement Communication Between Branches (Running OSPF)" of "Using VPN to Implement WAN Interconnection" in Typical Configuration Examples.

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