Figure 5-2 Setting Circuit Routing Preferences For A Ds-1 Circuit - Cisco ONS 15327 Procedure Manual

NTP-B181 Create an Automatically Routed DS-1 Circuit
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.
Figure 5-2
If you selected Fully Protected Path and the circuit will be routed on a path protection dual ring
Step 12
interconnect (DRI), check the Dual Ring Interconnect check box.
If you selected Using Required Nodes/Spans in
Step 13
with Step
Click Next.
a.
In the Circuit Route Constraints area, click a node or span on the circuit map.
b.
Click Include to include the node or span in the circuit. Click Exclude to exclude the node or span
c.
from the circuit. The order in which you choose included nodes and spans is the order in which the
circuit will be routed. Click spans twice to change the circuit direction.
Repeat Step c for each node or span you wish to include or exclude.
d.
Review the circuit route. To change the circuit routing order, choose a node from the Required
e.
Nodes/Lines or Excluded Notes Links lists and click the Up or Down buttons to change the circuit
routing order. Click Remove to remove a node or span.
Click Next. On the VT Circuit panel in the Create area, choose one of the following:
Step 14
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 to an 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:
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Cisco ONS 15327 Procedure Guide, R4.0
5-8
Setting Circuit Routing Preferences for a DS-1 Circuit
16.
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.
Chapter 5
Step 9, complete the following substeps. If not, continue
Create Circuits and VT Tunnels
March 2003