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Figures
Figure 1-1. Dial VPN Network with Layer 3 and Layer 2 Tunnels ...............................1-3
Figure 1-2. Dial VPN Network with Connections to Different Destination Types ........1-6
Figure 2-1. Layer 2 Tunnel Packet Path ......................................................................2-2
Figure 2-2. L2TP Packet Encapsulation Process .......................................................2-5
Figure 2-3. Tunnel Authentication Control Messages .................................................2-9
Figure 2-4. L2TP Network Using a LAC ...................................................................2-12
Figure 2-5. L2TP Network Using a RAS ...................................................................2-12
Figure 3-1. Layer 3 Tunnel Packet Path ......................................................................3-2
Figure 3-2. DHCP Operational Timeline .....................................................................3-9
Figure 3-3. Dial VPN Dynamic IP Address Management Sequence ........................3-12
Figure 3-4. Dial VPN Network with Secondary Gateways on the
Frame Relay Connection .......................................................................3-14
Figure 3-5. Packet Encapsulation and Decapsulation Process ................................3-19
Figure 3-6. Sending a Packet to a Remote Node .....................................................3-21
Figure 3-7. Static Routes from a CPE Router to a Dial VPN Gateway .....................3-22
Figure 6-1. Message Exchanges Supporting RADIUS TMS Operations ...................6-3
Figure 8-1. Static Route Between the CPE Router and the Gateway ........................8-2
Figure C-1. Network Topology for ping -t Examples .................................................C-23
Figure D-1. ASN with one subnet as Dial-in Client ....................................................D-5
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