How to check whether IPSec proposal parameters configured on both ends are consistent

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Run the display ipsec proposal command to check whether IPSec Proposal parameters configured on both ends are consistent. If inconsistent, modify the related algorithms in the IPSec Proposal view.

Other related questions:
How to check whether IKE proposal parameters configured on both ends are consistent ?
Run the display ike proposal command to check whether IKE Proposal parameters configured on both ends are consistent. Check whether the algorithms of the IKE Proposal configured on both ends are consistent. If inconsistent, modify the algorithms in the IKE Proposal view.

How to check whether configured PFS Algorithms are consistent ?
Run the display ipsec policy command to check whether PFS algorithm parameters configured on both ends are consistent. If inconsistent, configure the PFS algorithm in the IPSec Proposal view.

whether USG2000 series devices support both ends are dynamic IP to build IPSec VPN
Only supports at least one end of the fixed IP connection establishment,do not support both ends are dynamic IP way to establish a connection

Can the intranets on both ends of the IPSec tunnel be on the same subnet
No. If the two networks are on the same subnet, the local gateway considers a packet destined to the remote network as a packet exchanged within the local network. Therefore, the local gateway does not forward the packet to the remote network through the IPSec tunnel. NOTE: If a headquarters establishes IPSec tunnels with multiple branch offices, the headquarters network and the branch networks cannot be on the same subnet, and the branch networks cannot be on the same subnet, either.

Setting the intranets on both ends of the IPSec tunnel to be on the same subnet on the USG5000
You are advised not to set the intranets of the two ends of the IPSec tunnel to be on the same network segment.

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