Panasonic NN46240-710 User Manual
Page 49
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Nortel Secure Router 8000 Series
Troubleshooting - VPN___________
Contents
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
2.3 Troubleshooting cases................................................................................................................................ 2-10
2.3.1 Ping of the peer tunnel fails although the network layer protocols on both ends are up....................2-11
2.3.2 PCs cannot ping through each other although tunnel interfaces on two ends can ping each other
successfully................................................................................................................................................ 2-14
2.4 FAQs.......................................................................................................................................................... 2-15
2.5 Diagnostic tools.......................................................................................................................................... 2-17
2.5.1 display commands.............................................................................................................................2-17
2.5.2 debugging commands....................................................................................................................... 2-19
2.5.3 Alarms............................................................................................................................................... 2-21
Issue 5.3 (30 March 2009)
Nortel Networks Inc.
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