Network Router User Manual

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4-33

Layer 3 Switching Software Feature and Configuration Guide

78-6235-04, Cisco IOS Release 12.0(10)W5(18)

Chapter 4 Configuring Interfaces

Configuring the ATM Uplink Interface (Catalyst 8540)

Configuring SONET Alarms

The ATM OC-12c and the ATM OC-3c uplink interfaces support SONET alarm monitoring. To

configure alarm monitoring, perform the following steps, beginning in global configuration mode:

To determine which alarms are reported on the ATM interface, and to display the BER thresholds, use

the show controllers atm command, as described in the “Verifying the ATM Configuration” section on

page 4-36. For a detailed description of the sonet report and sonet threshold commands, refer to the

ATM Switch Router Command Reference publication.

Configuring Loopback

The ATM uplink interface is configured by default with no loopback. To enable loopback, use the

loopback command in interface configuration mode.

Command Purpose

Step 1

Router(config)# interface atm

slot/subslot/interface

Router(config-if)#

Enters interface configuration mode and specifies the ATM

interface to configure.

Step 2

Router(config-if)# sonet report

{b1-tca | b2-tca | b3-tca | lais |

tim-p | uneq-p}

Permits console logging of selected SONET alarms.

The alarms are as follows:

• b1-tca (B1 bit error rate [BER] threshold crossing alarm)

• b2-tca (B2 BER threshold crossing alarm)

• b3-tca (B3 BER threshold crossing alarm)

• lais (line alarm indication signal)

• lrdi (line remote defect indication)

• pais (path alarm indication signal)

• plm-p (payload label, C2 mismatch alarm)

• plop (path loss of pointer), prdi (path remote defect

indication)

• rdool (receive data out of lock)

• sd-ber (LBIP BER in excess of threshold)

• sf-ber (signal failure BER)

• slof (section loss of frame)

• slos (section loss of signal)

• tim-p (path trace identifier, J1 mismatch alarm)

• uneq-p (path unequipped C2 alarm).

The b1-tca, b2-tca, b3-tca, plop, sf-ber, slof, slos are enabled by

default.

Step 3

Router(config-if)# sonet

threshold {b1-tca | b2-tca |

b3-tca | sd-ber | sf-ber} rate

Sets the BER threshold values of the specified alarms. Default

values are 6 for b1-tca, b2-tca, b3-tca, and sd-ber; 3 for sf-ber.