6-50
Cisco ONS 15454 SDH Procedure Guide, R7.0
78-17194-01
Chapter 6 Create Circuits and Low-Order Tunnels
NTP- D187 Create a Low-Order Aggregation Point
NTP-D187 Create a Low-Order Aggregation Point
Note You can create low-order aggregation points for circuits in MS-SPRing or 1+1 protection, or for
unprotected circuits. You cannot create them for SNCP ring circuits.
Note The maximum number of LAPs that you can create depends on the node protection topology and the
number of low-order circuits that terminate on the node. Assuming that no other low-order circuits
terminate at the node, the maximum number of LAPs that you can terminate at one node is 8 for 1+1 and
12 for MS-SPRing protection.
Step 1 Complete the “DLP-D60 Log into CTC” task on page 17-49 at an ONS 15454 SDH on the network
where you will create the LAP. 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-D314 Assign a Name to a Port” task on page 20-7. If you want CTC to assign a name
automatically based on circuit type, node name, and sequence number, 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 VC_LO_PATH_AGGREGATION.
Step 6 Click Next.
Step 7 Define the circuit attributes (Figure 6-8 on page 6-51):
• Name—Assign a name to the low-order 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
LAP.
• Size—Defaults to VC4. You cannot change the value.
• Bidirectional—Defaults to Bidirectional. You cannot change the value.
• State—Choose the administrative state to apply to all of the cross-connects in a circuit:
–
Unlocked—Puts the circuit cross-connects in the Unlocked-enabled service state.
–
Locked,disabled—Puts the circuit cross-connects in the Locked-enabled,disabled service state.
Traffic is not passed on the circuit.
Purpose This procedure creates a low-order aggregation point (LAP). LAPs allow
multiple VC3 or VC12 low-order circuits to be aggregated on a single VC4
circuit. LAPs allow multiple low-order circuits to pass through
cross-connect cards without utilizing resources on the cross-connect card
low-order matrix.
Tools/Equipment None
Prerequisite Procedures NTP-D127 Verify Network Turn-Up, page 6-5
Required/As Needed As needed
Onsite/Remote Onsite or remote
Security Level Provisioning or higher
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