Cisco ONS 15454 SDH Specifications download pdf (Page 274)

6-22

Cisco ONS 15454 SDH Installation and Operations Guide, R3.3

May 2002

Chapter 6 Circuits and Tunnels

Creating a Path Trace

Step 9 Provision the circuit source expected string:

a. On the Edit Circuit window right-click the circuit source port and choose Edit Path Trace from the

shortcut menu.

b. On the Circuit Path Trace window, enable the path trace expected string by choosing Auto or

Manual from the Path Trace Mode drop-down menu:

–

Auto—Uses the first string received from the port at the other end as the baseline string. An

alarm is raised when a string that differs from the baseline is received. Continue with Substep c.

–

Manual—Uses the Current Expected String field as the baseline string. An alarm is raised when

a string that differs from the Current Expected String is received. Enter the string that the circuit

source should receive from the circuit destination in the New Expected String field.

c. Click the Disable AIS on TIM-P checkbox if you want to suppress the Alarm Indication Signal

when the Path Trace Identifier Mismatch Path (TIM-P) alarm is displayed. Refer to the Cisco ONS

15454 SDH Troubleshooting and Maintenance Guide for descriptions of alarms and conditions.

d. Click Apply, then click Close.

Step 10 After you set up the path trace, the received string is displayed in the Received box on the path trace

setup window. The following options are available:

• Click Switch Mode to toggle between ASCII and hexadecimal display.

• Click the Reset button to reread values from the port.

• Click Default to return to the path trace default settings (Path Trace Mode is set to Off and the New

Transmit and New Expected Strings are null).

Caution Clicking Default will generate alarms if the port on the other end is provisioned with a different string.

The Expect and Receive strings are updated every few seconds only if Path Trace Mode is set to Auto or

Manual.

When you display the detailed circuit window, path trace is indicated by an M (manual path trace) or an

A (automatic path trace) at the circuit source and destination ports.

Procedure: Monitoring a Path Trace on STM-N Ports

Step 1 Start CTC on a node in the network where path trace was provisioned on the circuit source and

destination ports.

Step 2 Click Circuits.

Step 3 Choose the VC4 circuit that has path trace provisioned on the source and destination ports, then click

Edit.

Purpose Use this task to monitor a path trace on STM-N ports within the circuit

path.

Tools/Equipment ONS 15454 SDH cards capable of receiving path trace must be installed at

the STM-N circuit ports. See Table 6-2 on page 6-19.

Prerequisite Procedures “Create a J1 Path Trace” section on page 6-20.

Onsite/Remote Onsite or remote

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