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5.7.2 ATM Loopback
In order to isolate the ATM interface problems, you can use ATM OAM
loopback cells to verify connectivity between VP/VC endpoints, as well
as segment endpoints within the VP/VC. ATM uses F4 and F5 cell
flows as follows:
F4: used in VPs
F5: used in VCs
An ATM connection consists of a group of points. This OAM
implementation provides management for the following points:
Connection endpoint: the end of a VP/VC connection where the ATM
cell are terminated
Segment endpoint: the end of a connection segment
This page allows you to use ATM ping, which generates F5 segment and
end-to-end loop-back cells to test the reach ability of a segment endpoint
or a connection endpoint.
Fields in this page:
Field Description
Select PVC Select the PVC channel you want to do the loop-back diagnostic.
Flow Type The ATM OAM flow type. The selection can be F5 Segment or F5 End-to-End.
Loopback Location ID
The loop-back location ID field of the loop-back cell. The default value is all 1s (ones) to
indicate the endpoint of the segment or connection.