To support IKEv1, you need to install the IKEv1 module file and enable IKEv1. To use the IKEv1 function and understand the IKEv1 principle and configuration method, apply for the corresponding IKEv1 module file and IKEv1 module file documentation. Log in to HUAWEI Technical Support Website, choose Software Download or Software Directory, select a product, and go to the Version or Patch page of the product. You can find the MOD file with IKEv1.