Huawei V200R001C01 - Page 6

3.1.2 Troubleshooting Cases............................................................................................................................51
4 LAN................................................................................................................................................56
4.1 VLAN Troubleshooting....................................................................................................................................57
4.1.1 Users in a VLAN Cannot Communicate with Each Other......................................................................57
4.2 MAC Address Table Troubleshooting.............................................................................................................61
4.2.1 Correct MAC Address Entries Cannot Be Generated.............................................................................61
4.3 MSTP Troubleshooting....................................................................................................................................66
4.3.1 MSTP Topology Change Leads to Service Interruption.........................................................................66
4.4 Transparent Bridging Troubleshooting............................................................................................................72
4.4.1 Layer 2 Traffic Forwarding in a Bridge Group Fails..............................................................................72
4.4.2 Traffic Forwarding in IP Routing of Bridge Groups Fails......................................................................75
5 WAN...............................................................................................................................................80
5.1 E1/T1 Troubleshooting.....................................................................................................................................81
5.1.1 E1/T1 Interface in Up State Fails to Correctly Send and Receive Data..................................................81
5.2 FR Troubleshooting..........................................................................................................................................85
5.2.1 Local Device Fails to Ping the Remote Device When the Link Protocol Status of Their Connected FR
Interfaces Is Up.................................................................................................................................................85
5.2.2 Troubleshooting Cases............................................................................................................................92
5.3 MFR Troubleshooting......................................................................................................................................92
5.3.1 Local Device Fails to Ping the Remote Device When the Link Protocol Status of Their Connected MFR
Interfaces Is Up.................................................................................................................................................93
5.3.2 Troubleshooting Cases............................................................................................................................98
5.4 DCC Troubleshooting.......................................................................................................................................99
5.4.1 Failed to Initiate Calls..............................................................................................................................99
5.4.2 Failed to Receive Calls..........................................................................................................................103
5.5 ISDN Troubleshooting...................................................................................................................................107
5.5.1 Link Failed to Be Established on ISDN Interfaces................................................................................107
5.6 PPPoE Troubleshooting..................................................................................................................................113
5.6.1 PPPoE Dialup Fails...............................................................................................................................113
5.7 PPP Troubleshooting......................................................................................................................................117
5.7.1 Protocol Status of a PPP Interface Is Down..........................................................................................117
5.8 xDSL Troubleshooting...................................................................................................................................122
5.8.1 Packets Fail to Be Forwarded on an ADSL Interface Working in ATM Mode....................................123
5.8.2 Packets Fail to Be Forwarded on a G.SHDSL Interface Working in ATM Mode................................127
5.9 3G Troubleshooting........................................................................................................................................132
5.9.1 3G Calls Failed After Dialing Parameters Were Correctly Set.............................................................132
6 Voice.............................................................................................................................................138
6.1 Voice Service Troubleshooting......................................................................................................................139
6.1.1 No Feed Is Detected on a Telephone.....................................................................................................139
6.1.2 No Dial Tone Is Heard After Offhook...................................................................................................141
6.1.3 Call Quality Is Low...............................................................................................................................143
6.1.4 Busy Tone Is Heard After Offhook.......................................................................................................145
Huawei AR2200-S Series Enterprise Routers
Troubleshooting Contents
Issue 01 (2012-01-06) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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