Panasonic NN46240-710 - Manual (Page 3)

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. i