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Cisco ONS 15454 Procedure Guide, R5.0
August 2005
Chapter 6 Create Circuits and VT Tunnels
NTP-A187 Create a VT Aggregation Point
Stop. You have completed this procedure.
NTP-A187 Create a VT Aggregation Point
Note VT aggregation points can be created for circuits on BLSR, 1+1, or unprotected nodes. They cannot be
created for circuits on path protection nodes.
Note The maximum number of VAPs that you can create depends on the node protection topology and number
of VT1.5 circuits that terminate on the node. Assuming no other VT1.5 circuits terminate at the node,
the maximum number of VAPs that you can terminate at one node is 8 for 1+1 protection and 12 for
BLSR protection.
Step 1 Complete the “DLP-A60 Log into CTC” task on page 17-66 at the node where you will create the VT
aggregation point. If you are already logged in, continue with Step 2.
Step 2 If you want to assign a name to the tunnel source and destination ports before you create the circuit,
complete the “DLP-A314 Assign a Name to a Port” task on page 20-8. If not, continue with Step 3.
Step 3 From the View menu, choose Go to Network View.
Step 4 Click the Circuits tab, then click Create.
Step 5 In the Circuit Creation dialog box, choose VT Aggregation Point from the Circuit Type list.
Step 6 Click Next.
Step 7 Define the circuit attributes (Figure 6-8):
• Name—Assign a name to the VT aggregation point. The name can be alphanumeric and up to
48 characters (including spaces). Circuit names should be 44 characters or less if you want the
ability to create monitor circuits. If you leave the field blank, CTC assigns a default name to the VAP.
• Size—Unavailable for VAPs.
• Bidirectional—Unavailable for VAPs.
• State—Choose the administrative state to apply to all of the cross-connects in a circuit:
Purpose This procedure creates a VT aggregation point (VAP). VAPs allow multiple
DS-1 (VT1.5) circuits to be aggregated on a single STS on an OC-N, EC1,
DS3, DS3E, DS3i-N-12, DS3XM-6, or DS3XM-12 card. VAPs allow
multiple VT1.5 circuits to pass through cross-connect cards without
utilizing resources on the cross-connect card VT matrix. You also have the
option to route the circuit through a portless transmultiplexing interface.
Tools/Equipment For portless transmultiplexing configurations, a DS3XM-12 card must be
installed on a node in the network.
Prerequisite Procedures NTP-A127 Verify Network Turn Up, page 6-4
Required/As Needed As needed
Onsite/Remote Onsite or remote
Security Level Provisioning or higher
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