Cisco Systems 15454 11.8 Monitor Circuits, 11.9 Path Protection Circuits

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Cisco ONS 15454 Reference Manual, R7.0
78-17191-01
Chapter 11 Circuits and Tunnels
11.8 11.8 Monitor Circuits
11.8 Monitor Circuits
Monitor circuits are secondary circuits that monitor traffic on primary bidirectional circuits. Figure 11-6
shows an example of a monitor circuit. At Node 1, a VT1.5 is dropped from Port 1 of an EC1-12 card.
To monitor the VT1.5 traffic, plug test equipment into Port 2 of the EC1-12 card and provision a monitor
circuit to Port 2. Circuit monitors are one-way. The monitor circuit in Figure 11-6 monitors VT1.5 traffic
received by Port 1 of the EC1-12 card.
Figure 11-6 VT1.5 Monitor Circuit Received at an EC1-12 Port
Note Monitor circuits cannot be used with Ethernet circuits.
11.9 Path Protection Circuits
Use the Edit Circuits window to change path protection selectors and switch protection paths
(Figure 11-7). In the UPSR 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 (SF/SD) thresholds.
• Change payload defect indication path (PDI-P) settings.
Note The XC-VXC-10G cross-connect card supports VT switching based on SF and SD bit error rate (BER)
thresholds. The XC10G and XCVT cross-connect cards do not support VT switching based on SF and
SD BER thresholds, and hence, in the path protection Selectors tab, the SF BER Level and SD BER
Level columns display "N/A" for these cards.
In the UPSR Switch Counts subtab, you can:
• Perform maintenance switches on the circuit selector.
• View switch counts for the selectors.
EC1-12 OC-N
XC
ONS 15454
Node 1
OC-N DS1-14
XC
ONS 15454
Node 2
VT1.5 Drop
VT1.5 Monitor
Test Set
Port 1
Port 2
Class 5
Switch
45157