Sierra Wireless AirLink RV50 Series User Manual page 139

VPN Configuration
The IPsec VPN employs the IKE (Internet Key Exchange) protocol to set up a
Security Association (SA) between the AirLink gateway and a Cisco (or Cisco
compatible) enterprise VPN server. IPsec has two phases for setting up an SA
between peer VPNs. Phase 1 creates a secure channel between the AirLink
gateway VPN and the enterprise VPN, thereby enabling IKE exchanges. Phase 2
sets up the IPsec SA that is used to securely transmit enterprise data.
Note: If you configure custom settings, they are saved and the tunnel can be disabled and
re-enabled without needing to re-enter the settings. For a successful configuration, all
settings for the VPN tunnel must be identical between the AirLink gateway VPN and the
enterprise VPN server.
You can also configure VPN Failover for IPsec VPN tunnels. For more information, see
VPN Failover on page 150.
To configure an IPsec VPN tunnel:
1. In ACEmanager, go to VPN.
2. Select the VPN you want to configure (1, 2, 3, 4, or 5).
3. In the VPN Type field, select IPsec Tunnel. The screen expands to show the
IPsec Tunnel fields.
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