6-35
Cisco ONS 15454 Procedure Guide, R5.0
August 2005
Chapter 6 Create Circuits and VT Tunnels
NTP-A187 Create a VT Aggregation Point
Step 10 Click Next.
Step 11 In the Circuit Destination area, choose the node where the VT circuits aggregated by the VAP will
terminate from the Node drop-down list.
Step 12 Click Next.
Step 13 In the Circuit Routing Preferences area, choose Route Automatically. Complete the following, as
necessary:
• Using Required Nodes/Spans—Check this check box to specify nodes and spans to include or
exclude in the CTC-generated tunnel route.
Including nodes and spans for a circuit ensures that those nodes and spans are in the working path
of the circuit (but not the protect path). Excluding nodes and spans ensures that the nodes and spans
are not in the working or protect path of the circuit.
• Review Route Before Creation—Check this check box to review and edit the VT tunnel route before
the circuit is created.
• VT-DS3 Mapped Conversion—Check this check box to route the VT tunnel over a portless
transmultiplexing interface. This check box will be unavailable if you chose a DS3, DS3E,
DS3i-N-12, DS3XM-6, or DS3XM-12 card as the VAP source in Step 9.
Step 14 If you selected VT-DS3 Mapped Conversion in Step 13, complete the following substeps; otherwise,
continue with Step 15:
a. Click Next.
b. In the Conversion Circuit Route Constraints area, complete the following:
• Node—Choose a node with a DS3XM-12 card installed.
• Slot—Choose the slot where a DS3XM-12 card is installed.
• DS3 Mapped STS—If applicable, choose Circuit Dest to indicate that the STS is the circuit
destination, or Circuit Source to indicate that the STS is the circuit source.
Step 15 If you selected Using Required Nodes/Spans in Step 13:
a. Click Next.
b. In the Circuit Route Constraints area, click a span on the VAP map.
c. Click Include to include the node or span in the VAP. Click Exclude to exclude the node or span
from the VAP. The sequence in which you choose the nodes and spans sets the VAP sequence. Click
spans twice to change the circuit direction.
d. Repeat Steps b and c for each node or span you wish to include or exclude.
e. Review the VAP route. To change the tunnel routing order, choose a node in the Required
Nodes/Lines or Excluded Nodes Links lists, then click the Up or Down buttons to change the tunnel
routing order. Click Remove to remove a node or span.
Step 16 If you selected Review Route Before Creation in Step 13:
a. Click Next.
b. Review the tunnel route. To add or delete a tunnel span, choose a node on the tunnel route. Blue
arrows show the tunnel route. 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.
c. If the provisioned tunnel does not reflect the routing and configuration you want, click Back to
verify and change tunnel information.
Step 17 Click Finish. The Circuits window appears.
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