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Panasonic NN46240-710 User Manual

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Nortel Secure Router 8000 Series

Troubleshooting - VPN___________

Contents

About this document............................................................................................................ 1

1 L2TP troubleshooting....................................................................................................1-5

1.1 L2TP overview........................................................................................................................................... 1-5

1.1.1 Two typical L2TP tunnel modes...................................................................................................... 1-5

1.1.2 L2TP tunnel session setup................................................................................................................ 1-5

1.2 VPDN troubleshooting on the L2TP.......................................................................................................... 1-5

1.2.1 Networking environment..................................................................................................................1-5

1.2.2 Configuration notes.......................................................................................................................... 1-5

1.2.3 Diagnostic flowchart........................................................................................................................ 1-5

1.2.4 Troubleshooting procedures............................................................................................................. 1-5

1.3 Troubleshooting L2TP access to the Layer 3 VPN.................................................................................... 1-5

1.3.1 Networking environment..................................................................................................................1-5

1.3.2 Configuration notes.......................................................................................................................... 1-5

1.3.3 Diagnostic flowchart........................................................................................................................ 1-5

1.3.4 Troubleshooting procedure...............................................................................................................1-5

1.4 Troubleshooting cases................................................................................................................................ 1-5

1.4.1 The session disconnects as soon as it is set up................................................................................. 1-5

1.5 FAQs...........................................................................................................................................................1-5

1.6 Diagnostic tools.......................................................................................................................................... 1-5

1.6.1 Display commands........................................................................................................................... 1-5

1.6.2 Debugging commands...................................................................................................................... 1-5

2 GRE troubleshooting.....................................................................................................2-1

2.1 GRE overview............................................................................................................................................ 2-2

2.1.1 Introduction to GRE......................................................................................................................... 2-2

2.1.2 Related concepts of GRE..................................................................................................................2-2

2.1.3 Applications of GRE........................................................................................................................ 2-3

2.2 Troubleshooting GRE.................................................................................................................................2-4

2.2.1 Typical networking...........................................................................................................................2-4

2.2.2 Configuration notes.......................................................................................................................... 2-4

2.2.3 Troubleshooting flowchart............................................................................................................... 2-7

2.2.4 Troubleshooting procedure...............................................................................................................2-8

Issue 5.3 (19 January 2009)

Nortel Networks Inc.

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