User guide

}

Interface Diagnostics Operational Mode Commands

Table 6 on page 92 summarizes the command-line interface (CLI) commands you can

use to run diagnostics on router interfaces. Commands are listed in alphabetical order.

Table 6: Interface Diagnostics Operational Mode Commands

CommandTask

test interface ds0-bert-startStart a bit error rate test (BERT) on a DS0 interface.

test interface ds0-bert-stopStop a BERT on a DS0 interface.

test interface e1-bert-startStart a BERT on an E1 interface.

test interface e1-bert-stopStop a BERT on an E1 interface.

test interface e3-bert-startStart a BERT on an E3 interface.

test interface e3-bert-stopStop a BERT on an E3 interface.

test interface fdl-line-loopTransmit over a facilities data link (FDL) to initiate or

terminate a far-end line loopback.

test interface fdl-payload-loopTransmit over an FDL to initiate or terminate a far-end

payload loopback.

test interface feac-loop-initiateTransmit the line loopback activate code word

sequence on the interface's far-end alarm and control

(FEAC) channel.

test interface feac-loop-terminateTransmit the line loopback deactivate code word

sequence on the interface's FEAC channel.

test interface inband-line-loopInitiate or terminate a far-end line loopback.

test interface inband-payload-loopInitiate or terminate a far-end payload loopback.

test interface restart-auto-negotiationRestart auto-negotiation on a Fast Ethernet or Gigabit

Ethernet interface.

test interface t1-bert-startStart a BERT on a T1 interface.

test interface t1-bert-stopStop a BERT on a T1 interface.

test interface t3-bert-startStart a BERT on a T3 interface.

test interface t3-bert-stopStop a BERT on a T3 interface.

E1 Interfaces Feature Guide for Routing Devices