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Router Interfaces Monitoring and Troubleshooting

Table 8 summarizes the command-line interface (CLI) commands you can use to monitor and troubleshoot router interfaces. In the table, the commands are grouped by functionality. In the remainder of this chapter, they are explained alphabetically.

Table 8: Commands for Monitoring Interfaces
Task Category
Task or Information to Monitor
CLI Command
Static Interface Information
General interface information.
show interfaces on page 126
Summary interface information.
show interfaces terse on page 287
Configured interface descriptions.
show interfaces descriptions on page 216
Routing information for each interface.
show interfaces routing on page 243
Media-specific interface information.
show interfaces media on page 217
Interface statistics.
show interfaces statistics on page 247
Clear (zero) interface statistics.
clear interfaces statistics on page 115
Real-time Interface Information
Interface statistics.
monitor interface on page 117
Automatic Protection Switching.
show aps on page 119
BERT Tests
(for T3 Interfaces Only)
Start bit error rate testing.
test interface bert-start on page 298
Stop bit error rate testing.
test interface bert-stop on page 298
Transmit the line loopback activate code word sequence on the interface's FEAC channel.
test interface feac-loop-initiate on page 299
Transmit the line loopback deactivate code word sequence on the interface's FEAC channel.
test interface feac-loop-terminate on page 299
VRRP
VRRP groups.
show vrrp on page 289
Clear (zero) VRRP groups.
clear vrrp on page 116
ILMI
ILMI messages
show ilmi on page 123
ILMI statistics
show ilmi statistics on page 124
Clear (zero) ILMI statistics
clear ilmi statistics on page 115

 


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