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Setting Up the Secure L2TP Connection
Figure 23 gives an overview
of the process used to set up a secure connection between the client
PC and an E-series router that is acting as a VPN provider.
Figure 23: L2TP/IPSec Connection
To set up the secure connection shown in Figure 23:
- Obtain an IP address from your ISP, using a normal B-RAS
termination.
- IKE signals a security association (SA) between the client
PC and the E-series router that is acting as a VPN provider.
- SAs are established to secure data traffic.
- The IPSec connection secures L2TP traffic.
- Set up an L2TP tunnel and session between the client PC
(the LAC) and the E-series router (the LNS).
The tunnel runs over the SAs that IKE established.
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