6-5
Cisco ONS 15454 Installation and Operations Guide
November 2001
Chapter6 Circuits and Tunnels
Creating Circuits and VT Tunnels
•Using Required Nodes/Spans—If selected, click Next to display the Circuit Route Constraints panel
(Figure 6-3). On the circuit map, click a node or span and click Include (to include the node or span
in the circuit) or Exclude (to exclude the node/span from the circuit). The order in which you select
included nodes and spans sets the circuit sequence. Click spans twice to change the circuit direction.
After you add the spans and nodes, you can use the Up and Down buttons to change the ir or der, or
click Remove to remove a node or span. When you are finished, click Finish or Next, depending
on whether you selected Review Route Before Creation.
Figure6-3 Specifying circuit constraints
•Review Route Before Creation—If selected, click Next to display the route for you to review. To add
or delete a circuit span, select a node on the circuit route. Blue arrows show the circuit ro ute. Green
arrows indicate spans that you can add. Click a span arrowhead, then click Include to include the
span or Remove to remove the span.
When you click Finish, CTC creates the circuit and returns to the Circuits window. If you entered more
than 1 in Number of Circuits in the Circuit Attributes dialog box in Step 3, the Circuit Source dialog box
is displayed so you can create the remaining circuits. If Auto Ranged is checked, CTC automatically
creates the number of sequential circuits that you entered in Number of Circuits. Otherwise, go on to
Step 13.
Step 13 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 procedures, see the “Install
Optical, Electrical, and Ethernet Cards” procedure on page1-48 an d the “Enable Ports” procedure on
page 3-10.