Method used to configure GRE over IPSec on the AR

Huawei AR routers support interworking between devices through GRE over IPSec and IPSec over GRE. GRE over IPSec is supported by all AR models and versions, whereas IPSec over GRE is supported only by AR models that run V200R005C10 or later versions.
For details on how to configure IPSec over GRE, see "Example for Configuring L2TP Over IPSec to Implement Secure Communication Between the Branch and Headquarters" of "Using VPN to Implement WAN Interconnection-GRE" in Product Documentation.
For details on how to configure GRE over IPSec, see "Example for Configuring GRE Over IPSec to Implement Communication Between Devices", "Example for Configuring OSPF and GRE Over IPSec to Implement Communication Between the Branch and Headquarters", and "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.

Other related questions:
GRE over IPSec configuration on the USG6000
Method used to configure L2TP over IPSec on the AR
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