Cisco ONS 15327 Procedure Manual page 181

Chapter 5 Create Circuits and VT Tunnels
Circuits routed on BLSR protection channels are not protected and are preempted during BLSR
Caution
switches.
Step 10 If you selected Fully Protected Path, choose one of the following:
Nodal Diversity Required—Ensures that the primary and alternate paths within the path protection
•
portions of the complete circuit path are nodally diverse.
• Nodal Diversity Desired—Specifies that node diversity is preferred, but if node diversity is not
possible, CTC creates fiber-diverse paths for the path protection portion of the complete circuit path.
• Link Diversity Only—Specifies that only fiber-diverse primary and alternate paths for path
protection portions of the complete circuit path are needed. The paths may be node-diverse, but CTC
does not check for node diversity.
Step 11 If you selected Fully Protected Path and the circuit will be routed on a path protection dual ring
interconnect (DRI), check the Dual Ring Interconnect check box.
Click Next. On the VT Circuit panel in the Create area, choose one of the following:
Step 12
• VT Tunnel on Transit Nodes—This option is available if the DS-1 circuit passes through a node that
does not have a VT tunnel, or if an existing VT tunnel is full. VT tunnels allow VT circuits to pass
through ONS 15327s without consuming cross-connect card resources. VT tunnels can carry 28
VT1.5 circuits. In general, creating VT tunnels is a good idea if you are creating many VT circuits
from the same source and destination. Refer to the Cisco ONS 15327 Reference Manual for more
information.
VT Aggregation Point—This option is available if you are creating a DS-1 circuit OC-N port. A VT
•
aggregation point (VAP) allows VT1.5 circuits to be routed through a node using one STS
connection on the cross-connect card matrix rather than multiple connections on the VT1.5 matrix.
If available, choose one of the following:
–
–
• None—Choose this option if you do not want to create a VT tunnel or a VAP. This will be the only
available option if CTC cannot create a VT tunnel or VAP.
Step 13 If you chose VT Aggregation Point, complete the following substeps. If not, continue with
a. Click Next.
On the VT Aggregation Point Destination panel, click the node that you want to be the VAP
b.
destination, then click Add Destination.
Step 14 Click Next. In the Route Review and Edit area, node icons appear for you to route the circuit manually.
The circuit source node is selected. Green arrows pointing from the source node to other network nodes
indicate spans that are available for routing the circuit.
Step 15 Complete the
you are creating.
Step 16 Click Finish. CTC completes the circuit and displays the Circuits window.
Step 17 On the Circuits window, click the circuit that you want to route to multiple drops. The Delete, Edit, and
Search buttons become active.
Step 18 Click Edit (or double-click the circuit row). The Edit Circuit window appears with the General tab
selected.
March 2003
Use source as the STS grooming end—Creates the VAP on the DS-1 circuit source node. This
option is available only if the DS-1 circuit originates on an OC-N card.
Use destination as the STS grooming end—Creates the VAP on the DS-1 circuit destination
node. This option is available only if the DS-1 circuit terminates on an OC-N card.
"DLP-B96 Provision a DS-1 or DS-3 Circuit Route" task on page 5-29
NTP-B183 Create a Unidirectional DS-1 Circuit with Multiple Drops
Cisco ONS 15327 Procedure Guide, R4.0
Step 16.
for the DS-1 circuit
5-15