Path Protectioncircuits; Figure 11-6 Vt1.5 Monitor Circuit Received At An Ec1-12 Port - Cisco 15454-DS1-14= - 1.544Mbps Expansion Module Reference Manual

Chapter 11 Circuits and Tunnels
Figure 11-6
VT1.5 Drop
Class 5
Switch
Test Set
VT1.5 Monitor
11.8.1 Monitor Circuits using portless ports as a source on DS3XM-12
With STS bi-directional circuit between source and destination and with VT-MAPPED at "circuit
source" as an option using DS3XM-12 in 15454 SONET platforms, two circuits will get created:
1) src->even portless port
2) odd portless port->dest
Traffic flow from source to dest is as follows:
src->even port->odd port->dest
While creating Monitor circuit using Even portless port as source, the circuit will get created in the
direction towards:
dest-> odd portless port-> Even portless port -> dest Monitored port
While creating Monitor circuit using odd portless port as source, the circuit will get created in the
direction towards:
src-> Even portless port-> odd portless port -> dest Monitored port
Monitor circuits cannot be used with Ethernet circuits.
Note

11.9 Path ProtectionCircuits

Use the Edit Circuits window to change path protection selectors and switch protection paths
(Figure
•
•
•
•
•
78-18106-01
VT1.5 Monitor Circuit Received at an EC1-12 Port
ONS 15454
Node 1
XC
Port 1
EC1-12
Port 2
11-7). In the Path Protection Selectors subtab in the Edit Circuits window, you can:
View the path protection circuit's working and protection paths.
Edit the reversion time.
Set the hold-off timer.
Edit the Signal Fail/Signal Degrade thresholds.
Change payload defect indication path (PDI-P) settings.
11.8.1 Monitor Circuits using portless ports as a source on DS3XM-12
OC-N OC-N
Cisco ONS 15454 Reference Manual, R8.5
ONS 15454
Node 2
XC
DS1-14
11-19