Avaya Configuring and Troubleshooting Bay Dial VPN (DVS) Networks Instrukcja Użytkownika Strona 25
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Tunneling Overview
302272-A Rev. 00 1-5
How a Dial VPN Network Functions
Any authorized remote user (using a PC or dial-up router) who has access to a
phone line and a modem can dial into your network through Dial VPN. A remote
node can be an individual user dialing in or a dial-up router (using IP) through a
public-switched telephone network (PSTN) or an ISDN connection. A remote
user can dial in to a Dial VPN network to connect either to a corporate or home
network or to a third-party ISP. Dial VPN regards these as functionally equivalent.
Figure 1-2
is a simplified illustration of one possible Layer 3 Dial VPN
configuration. In reality, a Dial VPN service provider’s network might include
several remote access servers to service a variety of dial-in users, with both Layer
3 and Layer 2 tunnels serving different types of networks. You can configure Dial
VPN so that its operation is transparent both to users and applications. You may
find it useful to draw a map of your own configuration and label the interfaces
with their IP and, if appropriate, frame relay Data Link Connection Identifier
(DLCI) addresses.
Encapsulation GRE L2TP
Tunnel end points NAS and gateway LAC and LNS
Dynamic IP address
allocation
IP pooling or DHCP IP pooling
Layer 3 protocols
supported
IP, IPX IP
Table 1-1. Layer 3 and Layer 2 Dial VPN Feature Implementation
Dial VPN Feature Layer 3 Layer 2
- Configuring and 1
- Troubleshooting Bay Dial 1
- VPN Services 1
- Trademarks 2
- Restricted Rights Legend 2
- Statement of Conditions 2
- Contents 5
- 302272-A Rev. 00 vii 7
- 302272-A Rev. 00 ix 9
- 302272-A Rev. 00 xi 11
- 302272-A Rev. 00 13
- About This Guide 15
- Conventions 16
- Acronyms 17
- Bay Networks Customer Service 19
- How to Get Help 19
- Chapter 1 21
- Tunneling Overview 21
- What Is Tunneling? 22
- Layer 3 Tunneling 24
- Layer 2 Tunneling 24
- DVS0012A 26
- Dial VPN Network Components 27
- 1-8 302272-A Rev. 00 28
- 1-10 302272-A Rev. 00 30
- 1-12 302272-A Rev. 00 32
- Where to Go Next 34
- Chapter 2 35
- Dial VPN Layer 2 Tunneling 35
- 2-2 302272-A Rev. 00 36
- L2T0003A 36
- 302272-A Rev. 00 2-3 37
- L2TP Packet Encapsulation 38
- 2-6 302272-A Rev. 00 40
- Security in an L2TP Network 41
- 2-8 302272-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
- 302272-A Rev. 00 2-13 47
- 2-14 302272-A Rev. 00 48
- Chapter 3 49
- Dial VPN Layer 3 Tunneling 49
- 3-2 302272-A Rev. 00 50
- DVS0001A 50
- 302272-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 302272-A Rev. 00 62
- 3-16 302272-A Rev. 00 64
- 3-18 302272-A Rev. 00 66
- DVS0007A 66
- Chapter 4 69
- 4-2 302272-A Rev. 00 70
- <acp or RADIUS> 71
- 4-4 302272-A Rev. 00 72
- 302272-A Rev. 00 4-5 73
- 4-6 302272-A Rev. 00 74
- Configuring Active RIP 75
- Chapter 5 77
- Tunnel Management Commands 80
- Command Arguments 81
- 5-12 302272-A Rev. 00 88
- 0013ABC0:001234560000 88
- Chapter 6 89
- 6-2 302272-A Rev. 00 90
- 302272-A Rev. 00 6-3 91
- DVS0015A 91
- Using RADIUS Accounting 92
- RADIUS server 93
- Chapter 7 99
- 7-2 302272-A Rev. 00 100
- 302272-A Rev. 00 7-3 101
- 7-4 302272-A Rev. 00 102
- Gateway Accounting Messages 103
- Chapter 8 105
- DVS0008A 106
- 8-2 302272-A Rev. 00 106
- 302272-A Rev. 00 8-3 107
- (continued) 108
- 302272-A Rev. 00 8-7 111
- 8-8 302272-A Rev. 00 112
- 302272-A Rev. 00 8-9 113
- Enabling L2TP 117
- Configuration is completed 118
- (continued) 121
- 8-18 302272-A Rev. 00 122
- field, which by 123
- Creating a Superscope 125
- Chapter 9 127
- Managing a Dial VPN Network 127
- 9-2 302272-A Rev. 00 128
- Appendix A 129
- Planning Worksheet 129
- A-2 302272-A Rev. 00 130
- For Each Destination Site 131
- For Each Remote Node 132
- Appendix B 133
- Syslog Messages 133
- TMS Syslog Messages 136
- Appendix C 143
- Troubleshooting 143
- Preventing Problems 144
- Preparing to Troubleshoot 145
- Troubleshooting Worksheet 146
- 302272-A Rev. 00 C-5 147
- Troubleshooting and Testing 148
- Cable Guide 148
- C-8 302272-A Rev. 00 150
- Caution: Avoid using the 151
- Caution: 152
- 302272-A Rev. 00 C-11 153
- C-12 302272-A Rev. 00 154
- 302272-A Rev. 00 C-13 155
- C-14 302272-A Rev. 00 156
- Managing 161
- Remote Access Concentrators 161
- Using Command Line Interfaces 161
- Managing Remote 163
- Access Concentrators Using 163
- Command Line Interfaces 163
- C-22 302272-A Rev. 00 164
- DVS0005A 165
- C-24 302272-A Rev. 00 166
- Troubleshooting the LAC 167
- Troubleshooting the LNS 168
- C-32 302272-A Rev. 00 174
- Glossary 175
- Glossary-6 302272-A Rev. 00 180
- Tunnel Management 180
- System (TMS) 180
- Virtual Private 180
- Network (VPN) 180
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