Cisco ONS 15454 Series Procedure Manual page 184

NTP-A183 Create a Unidirectional DS-1 Circuit with Multiple Drops
Complete the
Step 9
In the Circuit Routing Preferences area, uncheck Route Automatically. When Route Automatically is
Step 10
not selected, the Using Required Nodes/Spans and Review Route Before Circuit Creation check boxes
are unavailable.
To set the circuit path protection, complete one of the following:
Step 11
To route the circuit on a protected path, leave Fully Protected Path checked and continue with
•
Step
and alternate paths), and the path diversity options apply only to path protection path segments, if
any exist.
• To create an unprotected circuit, uncheck Fully Protected Path and continue with
To route the circuit on a BLSR protection channel, if available, uncheck Fully Protected Path,
•
check Protection Channel Access, click Yes in the Warning dialog box, then continue with
Caution Circuits routed on BLSR protection channels are not protected and are preempted during BLSR
switches.
If you selected Fully Protected Path in
Step 12
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 might be node-diverse, but
CTC does not check for node diversity.
If you selected Fully Protected Path in
Step 13
click the Dual Ring Interconnect check box.
Click Next. In the Create area of the VT Matrix Optimization panel, choose one of the following:
Step 14
Create 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 15454s 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 15454 Reference Manual for
more information.
• Create VT aggregation point—This option is available if the DS-1 circuit source or destination is on
an EC1, DS3, DS3E, DS3i-N-12, DS3XM-6, DS3XM-12, or OC-N port on a BLSR, 1+1, or
unprotected node. VAPs collect DS-1s on an STS for handoff to non-ONS 15454 networks or
equipment, such as an IOF, switch, or digital access and cross-connect system (DACS). It allows
VT1.5 circuits to be routed through the node using one STS connection on the cross-connect card
matrix rather than multiple VT connections on the cross-connect card VT matrix. If you want to
aggregate the DS-1 circuit you are creating with others onto an STS for transport outside the
ONS 15454 network, choose one of the following:
–
Cisco ONS 15454 Procedure Guide, R5.0
6-16
"DLP-A95 Provision a DS-1 Circuit Source and Destination" task on page
12. Fully protected paths might or might not have path protection path segments (with primary
STS grooming node is [source node], VT grooming node is [destination node]—Creates the
VAP on the DS-1 circuit source node. This option is available only if the DS-1 circuit originates
on an EC1, DS3, DS3E, DS3i-N-12, DS3XM-6, DS3XM-12, or OC-N card.
Step 11 and the circuit will be routed on a path protection, choose
Step 11 and the circuit will be routed on a path protection DRI,
Chapter 6 Create Circuits and VT Tunnels
17-96.
Step 16.
August 2005
Step 16.