Troubleshooting guide

5-8
ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-02
Chapter 5 Troubleshooting Switch Router ATM Interface Connections
Performing OAM Loopback Tests
Figure 5-1 shows the various loopback operations available.
Figure 5-1 OAM Loopback Operations
UNI UNI NNI UNI NNI UNI
End system
Segment
Segment
link-side
loopback
Segment
network-side
loopback
End-to-end
loopback
Segment
link-side
loopback
Segment
End-to-end
Segment Segment
ATM switch
ATM switch ATM switch
Public ATM
network
Connection
endpoint
Connection
endpoint
Segment
endpoint
Segment
endpoint
Connecting
point
Connecting
point
Application
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