6-13
Cisco ONS 15454 Procedure Guide, R5.0
August 2005
Chapter 6 Create Circuits and VT Tunnels
NTP-A182 Create a Manually Routed DS-1 Circuit
Caution
Circuits routed on BLSR protection channels are not protected and are preempted during BLSR
switches.
Step 13
If you selected Fully Protected Path in
and the circuit will be routed on a path protection, choose
a Node-Diverse Path option:
•
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.
Step 14
If you selected Fully Protected Path in
and the circuit will be routed on a path protection DRI,
check the
Dual Ring Interconnect
check box.
Step 15
Click
Next
. In the Create area of the VT Matrix Optimization panel, choose one of the following:
•
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:
–
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.
–
STS grooming node is
[destination node]
, VT grooming node is
[source node]
—Creates the
VAP on the DS-1 circuit destination node. This option is available only if the DS-1 circuit
terminates on an EC1, DS3, DS3E, DS3i-N-12, DS3XM-6, DS3XM-12, or OC-N card.
•
None—Choose this option if you do not want to create a VT tunnel or a VAP. This is the only
available option if CTC cannot create a VT tunnel or VAP.
Step 16
Click
Next
. In the Route Review and Edit area, node icons appear for you to route the circuit. 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 17
Complete the
“DLP-A96 Provision a DS-1 or DS-3 Circuit Route” task on page 17-97
for the DS-1
circuit you are creating.
Step 18
Click
Finish
. CTC compares your manually provisioned circuit route with the specified path diversity
option you chose in
. If the path does not meet the specified path diversity requirement, CTC
displays an error message and allows you to change the circuit path.
Summary of Contents for ONS 15454 Series
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Page 44: ...Tasks xliv Cisco ONS 15454 Procedure Guide R5 0 December 2004 ...
Page 53: ...liii Cisco ONS 15454 Procedure Guide R5 0 December 2004 About this Guide Document Conventions ...
Page 55: ...lv Cisco ONS 15454 Procedure Guide R5 0 December 2004 About this Guide Document Conventions ...
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