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8-4
Cisco MGX 8260 Command Line Interface Guide
Release 1.2, Part Number 78-10987-01 Rev. B0, January, 2002
Chapter 8 Troubleshooting
Performing BERT Tests
SONET Loopback
To perform a SONET loopback test, follow these steps:
Step 1 Activate the loopback using the chsonetln command, specifying the slot, line, and loopback type. Refer
to the following table for the loopback type:
Note Serial and parallel loops are both local loopback states.
For example, the following command loops line 2 on slot 9:
chsonetln 9.2 # # # 2
The system activates the loopback and changes the corresponding line LED to blinking yellow.
Step 2 Perform SONET signal tests, as appropriate.
Step 3 Release the loopback by reentering the chds3ln command, but specify the dsx3NoLoop parameter. For
example, to release the loopback on slot 7, line 2, enter the command as follows:
chsonetln 7.2 # # # # 1
The system releases the loopback, changes the line LED to green, and returns the line to normal
operation.
Step 4 Verify that the loopback is clear using the lssonetln command.
Performing BERT Tests
Bit Error Rate Tests (BERT) check the error performance of DS1/E1 lines. Often used in conjunction
with loopback tests, this test helps isolate equipment or line segments with degraded performance.
Typically, you activate loopback on one end of the communications link and activate the BERT test on
the other. Do not activate loopback and BERT together on the same equipment.
Warning
BERT tests interrupt service. Perform in a pre-arranged maintenance window or when
the line is down.
Value Name
1 No loop
2Line loop
3 Serial loop
4 Parallel loop
- Cisco MGX 8260 Command Line 1
- Interface Guide 1
- CONTENTS 3
- 3 Card Management 3-1 4
- 4 Service Management 4-1 5
- Contents 6
- 5 Call Control 5-1 7
- 6 Alarm Surveillance 6-1 9
- 7 Performance Monitoring 7-1 10
- 8 Troubleshooting 8-1 11
- 9 Command Reference 9-1 12
- Table 9-4 Time Zones 9-130 16
- About This Guide 17
- Conventions 18
- Obtaining Documentation 18
- Cisco Connection Online 19
- Technical Assistance Center 19
- Documentation Feedback 20
- Features and Benefits 21
- • Deliver New Services 22
- • WebViewer 22
- • Command line interface 22
- SNMP Manager 23
- Command Line Interface 24
- System Indicators 25
- Broadband Line Indicators 25
- Card and Line Indicators 26
- Front Panel Controls 26
- System Management 27
- Configuring System Security 28
- Adding User Profiles 29
- Changing Passwords 29
- Deleting User Profiles 29
- Viewing Current Logins 30
- Viewing Community Strings 31
- Adding Community Strings 31
- Deleting Community Strings 31
- Configuring Node Parameters 32
- Setting Node Parameters 33
- • In-band management path 34
- • Ethernet port IP addresses 34
- • In-band IP address 34
- • MGX 8260 MAC address 34
- Configuring IP Routes 36
- Adding IP Routes 37
- Deleting IP Routes 38
- Setting Clock Parameters 38
- Viewing Clock Parameters 39
- Card Management 41
- Configuring Card Parameters 42
- Configuration Tasks for Cards 43
- • Back card 48
- • Back plane 48
- Back Card Mode 49
- Setting the ATM Queue Profile 50
- Understanding Redundancy 51
- Using 1:N NSC Redundancy 52
- Using 1:1 BSC Redundancy 53
- Adding NSC Redundancy 56
- Adding BSC Redundancy 57
- Deleting Redundancy 57
- Backing Up Configurations 58
- Uploading Configurations 59
- Downloading Configurations 59
- Restoring Configurations 60
- Upgrading Software Images 61
- Upgrading Card Software 62
- Upgrading SCC Software 63
- Upgrading BSC Software 64
- Upgrading NSC Software 66
- Service Management 69
- Viewing DS0 Lines 70
- Configuring DS1 or E1 Lines 71
- Configuration Tasks for Lines 73
- Adding DS1/E1 Lines 75
- Changing DS1/E1 Lines 75
- Configuring DS3 Lines 76
- Adding DS3 Lines 78
- Changing DS3 Lines 78
- Mapping DMC Lines 79
- Adding Map Table Entries 80
- Changing Map Tables 81
- Deleting Map Table Entries 81
- Viewing Map Tables 81
- • disabled 82
- • enabled 82
- • active 82
- • inactive 82
- Adding a Fast Ethernet Line 83
- Changing a Fast Ethernet Line 84
- Deleting Fast Ethernet Lines 84
- Configuring Static Routes 85
- Configuring OC-3 Lines 86
- • No loop 89
- • Line loop 89
- • Serial loop 89
- • Parallel loop 89
- Adding OC-3 Lines 90
- Changing OC-3 Lines 90
- Deleting OC-3 Lines 90
- Using 16-Byte Messages 92
- Using 64-Byte Messages 92
- Forming Hex Messages 93
- Configuration Tasks for Ports 94
- Changing Voice Ports 95
- Deleting Voice Ports 95
- Checking All MGX 8260 ports 96
- Viewing Active Calls 97
- Viewing Calls by Transaction 99
- File Encoding 99
- File Types 100
- File Names 100
- Viewing Announcement Files 101
- Call Control 103
- Understanding MGCP 104
- Configuration Tasks for MGCP 105
- Configuring MGCP IP Addresses 106
- Viewing MGCP Settings 107
- Viewing MGCP Voice Parameters 108
- Understanding Sessions 112
- Configuring Session Sets 113
- Configuring Session Groups 115
- Configuring Sessions 116
- Viewing Session Statistics 118
- Managing ISDN D Channels 120
- D Channel Configuration Tasks 121
- Managing MACSAP Profiles 122
- Viewing MACSAP Statistics 123
- Managing DLSAP Profiles 124
- Viewing DLSAP Status 125
- Viewing DLSAP Statistics 126
- Configuring D Channels 127
- Changing D Channels 128
- Deleting D Channels 128
- Viewing D Channels 128
- Chapter 5 Call Control 130
- Viewing LAPD Parameters 132
- Configuration Tasks for IPDC 133
- Configuring COT Settings 135
- Viewing IPDC Settings 135
- Viewing IPDC COT Information 138
- Alarm Surveillance 139
- Monitoring Shelf Alarms 140
- Surveillance Tasks for Alarms 141
- Monitoring Card Alarms 142
- Monitoring DS1 Alarms 143
- Viewing DS1 Alarm Thresholds 144
- Setting DS1 Alarm Thresholds 145
- Monitoring E1 Alarms 146
- Viewing E1 Alarm Thresholds 148
- Monitoring DS3 Alarms 150
- Viewing DS3 Alarm Thresholds 151
- Monitoring OC-3 Alarms 153
- Viewing OC-3 Alarm Thresholds 155
- Setting OC-3 Alarm Thresholds 157
- Specifying Sensors 158
- Voltage Sensor Listing 159
- Temperature Sensor Listing 160
- Fan Sensor Listing 161
- Configuring User Email Alerts 163
- Changing Email Alerts 164
- Deleting Email Alerts 164
- Working With Traps 168
- Understanding Trap Numbers 169
- Card Traps 170
- DS1 Traps 170
- DS3 Traps 171
- SONET Traps 172
- Fast Ethernet Traps 172
- Voice Port Events 173
- ISDN Traps 173
- MGCP Traps 173
- Backhaul Traps 174
- Performance Monitoring 175
- Viewing Total T1 Statistics 176
- Monitoring DS1 Performance 178
- Monitoring E1 Performance 179
- Viewing Total E1 Statistics 180
- Monitoring DS3 Performance 185
- Viewing Total DS3 Statistics 186
- Monitoring SONET Performance 187
- Viewing Line Total Statistics 192
- Viewing Path Total Statistics 195
- Troubleshooting 201
- DS1/E1 Loopback 202
- DS3 Loopback 203
- Performing BERT Tests 204
- DS1/E1 BERT Test 205
- Clearing Alarms 206
- Clearing Fast Ethernet Alarms 209
- Clearing SONET Alarms 209
- Clearing Environmental Alarms 211
- Command Reference 213
- Understanding Bitmaps 214
- Using Online Help 215
- Command Description 219
- • NSC: 1-8 and 11-16 222
- • BSC: 11-16 222
- • NSC: 1-16 222
- Alarm Thresholds: 268
- Table 9-4 Time Zones 342
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