Cisco ONS 15454 SDH Specifications Page 266

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Cisco ONS 15454 SDH Installation and Operations Guide, R3.3
May 2002
Chapter 6 Circuits and Tunnels
Creating Multiple Drops for Unidirectional Circuits
Figure 6-7 CTC creates low-order path circuits for port grouping
Step 12 If you are provisioning circuits before installing the traffic cards and enabling their ports, you must
install the cards and enable the ports before circuits will carry traffic. For card installation procedures,
see the Install Optical, Electrical, and Ethernet Cards procedure on page 1-33. For ring-related
procedures, see Chapter 5, SDH Topologies.
6.4 Creating Multiple Drops for Unidirectional Circuits
Unidirectional circuits can have multiple drops for use in broadcast circuit schemes. In broadcast
scenarios, one source transmits traffic to multiple destinations, but traffic is not returned back to the
source.
When you create a unidirectional circuit, the card that does not have its backplane Rx input terminated
with a valid input signal generates a loss of service (LOS) alarm. To mask the alarm, create an alarm
profile suppressing the LOS alarm and apply it to the port that does not have its Rx input terminated. See
the Alarm Profiles section on page 10-10 for information.
Procedure: Create a Unidirectional Circuit with Multiple Drops
Step 1 Use the Create an Automatically Routed High-Order Path Circuit procedure on page 6-3 to create a
circuit. To make it unidirectional, clear the Bidirectional check box on the Circuit Creation dialog box.
Step 2 After the unidirectional circuit is created, in node or network view select the Circuits tab.
Step 3 Select the unidirectional circuit and click Edit (or double-click the circuit).
78077
Purpose Use this procedure to create a unidirectional circuit with multiple drops.
Prerequisite Procedures
Onsite/Remote Onsite or remote
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