Avaya Configuring and Troubleshooting Bay Dial VPN (DVS) Networks Instrukcja Użytkownika Strona 65
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Oceniono. / 5. Na podstawie oceny klientów
Dial VPN Layer 3 Tunneling
303509-A Rev 00 3-17
5.
The CPE router decapsulates the frame relay or PPP packet and routes
the data to the intended recipient on the home network.
How a Packet Returns to the Remote Node
To send packets from the home network to a remote node, Dial VPN reverses the
process described in the previous section. The tunnel ensures that packets from the
home network reach the remote node, regardless of where it is located.
The Dial VPN gateway intercepts and forwards packets to the remote node using a
care-of address that is specified to the gateway during the connection process.
This address, which is usually the address of the Dial VPN Remote Access
Concentrator, is the IP address of the other end point of the tunnel. When the
gateway encapsulates the frame relay packet in a GRE packet, it includes the
care-of address. Figure 3-5
shows a simplified view of how a data packet moves
from the home network to a remote node through an erpcd-based network.
Figure 3-5. Sending a Packet to a Remote Node
DVS0013A
Tunnel
Network access
server (NAS)
Gateway
PPP
connection
Service
provider network
Frame relay
connection
Customer
"home"
network
Remote
node
Tunnel
management
server
Data
The gateway sends the packet to the
NAS's
care-of address
. The NAS
decapsulates the GRE information
and then encapsulates the data with
PPP information. The NAS
sends the PPP packet to the
remote node.
The packet moves from the CPE
router to the gateway via static routes.
The gateway decapsulates the frame
relay information and then encapsulates
the data with GRE information. The gateway
sends the GRE packet to the care of address.
Static routes
- Configuring and 1
- Troubleshooting Bay Dial 1
- VPN Services 1
- Trademarks 2
- Restricted Rights Legend 2
- Statement of Conditions 2
- Contents 5
- 303509-A Rev 00 vii 7
- 303509-A Rev 00 ix 9
- 303509-A Rev 00 xi 11
- 303509-A Rev 00 13
- Before You Begin 15
- Text Conventions 15
- Acronyms 17
- How to Get Help 19
- Chapter 1 21
- Tunneling Overview 21
- What Is Tunneling? 22
- Layer 3 Tunneling 24
- Layer 2 Tunneling 24
- 1-6 303509-A Rev 00 26
- Dial VPN Network Components 27
- 1-8 303509-A Rev 00 28
- 1-10 303509-A Rev 00 30
- 1-12 303509-A Rev 00 32
- Where to Go Next 34
- Chapter 2 35
- Dial VPN Layer 2 Tunneling 35
- 2-2 303509-A Rev 00 36
- L2T0003A 36
- 303509-A Rev 00 2-3 37
- L2TP Packet Encapsulation 38
- 2-6 303509-A Rev 00 40
- Security in an L2TP Network 41
- 2-8 303509-A Rev 00 42
- RADIUS User Authentication 43
- RADIUS Accounting 44
- L2TP IP Interface Addresses 44
- Starting an L2TP Session 45
- Examples of L2TP Tunnels 46
- 303509-A Rev 00 2-13 47
- 2-14 303509-A Rev 00 48
- Chapter 3 49
- Dial VPN Layer 3 Tunneling 49
- 3-2 303509-A Rev 00 50
- 303509-A Rev 00 3-3 51
- How Tunnel Management Works 52
- How the TMS Database Works 54
- How DHCP Works 55
- shows the entire process 56
- Assigning Addresses 58
- Starting the Connection 60
- 3-14 303509-A Rev 00 62
- 3-16 303509-A Rev 00 64
- 3-18 303509-A Rev 00 66
- DVS0007A 66
- Chapter 4 69
- 4-2 303509-A Rev 00 70
- <acp_or_RADIUS> 71
- stats -o 72
- <called_number> 73
- Configuring Active RIP 75
- Chapter 5 77
- Configuring TMS and Security 77
- for erpcd Networks 77
- 5-2 303509-A Rev 00 78
- 303509-A Rev 00 5-3 79
- Tunnel Management Commands 80
- All commands except 81
- Command Arguments 82
- 303509-A Rev 00 5-13 89
- 0013ABC0:001234560000 89
- Chapter 6 91
- 6-2 303509-A Rev 00 92
- 303509-A Rev 00 6-3 93
- DVS0015A 93
- Using RADIUS Accounting 94
- RADIUS server 95
- Messages.” 99
- Chapter 7 101
- 7-2 303509-A Rev 00 102
- <slot_number> 103
- Caution: 104
- Gateway Accounting Messages 105
- Chapter 8 107
- 8-2 303509-A Rev 00 108
- DVS0008A 108
- 303509-A Rev 00 8-3 109
- (continued) 110
- 303509-A Rev 00 8-7 113
- 8-8 303509-A Rev 00 114
- 303509-A Rev 00 8-9 115
- Enabling L2TP 119
- (continued) 123
- Framed-IPX-Network 124
- 303509-A Rev 00 8-19 125
- Creating a Superscope 127
- Chapter 9 129
- Managing a Dial VPN Network 129
- 9-2 303509-A Rev 00 130
- Appendix A 131
- Planning Worksheet 131
- A-2 303509-A Rev 00 132
- For Each Destination Site 133
- For Each Remote Node 134
- Appendix B 135
- Syslog Messages 135
- TMS Syslog Messages 138
- Appendix C 145
- Troubleshooting 145
- Preventing Problems 146
- Preparing to Troubleshoot 147
- Troubleshooting Worksheet 148
- 303509-A Rev 00 C-5 149
- Troubleshooting Routers 150
- Cable Guide 150
- C-8 303509-A Rev 00 152
- 303509-A Rev 00 C-11 155
- C-12 303509-A Rev 00 156
- 303509-A Rev 00 C-13 157
- C-14 303509-A Rev 00 158
- Managing 163
- Remote Access Concentrators 163
- Using Command Line Interfaces 163
- Managing Remote 165
- Access Concentrators Using 165
- Command Line Interfaces 165
- C-22 303509-A Rev 00 166
- DVS0005A 167
- C-24 303509-A Rev 00 168
- Troubleshooting the LAC 169
- Troubleshooting the LNS 170
- C-32 303509-A Rev 00 176
- Glossary 177
- Glossary-6 303509-A Rev 00 182
- Tunnel Management 182
- System (TMS) 182
- Virtual Private 182
- Network (VPN) 182
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