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8. Troubleshooting
8-18 December 2002 9700-A2-GB20-20
PVC Tests
PVC tests can be run on a requested DLCI for a selected interface. Data Port PVC
tests do not apply to the DSL router.
When PVC tests are on a multiplexed DLCI between FrameSaver devices,
they are nondisruptive to data, so user data can continue to be sent during
atest.
If the device at one end of the circuit is not a FrameSaver device, PVC tests
are on a standard DLCI and are disruptive to data. Also, the Connectivity test
would not appear.
Loopback and send/monitor pattern tests are available for each interface on the
selected DLCI. FrameSaver devices should be at each end of the circuit. If a
PVC Loopback is started at one end of the circuit, the other end can send and
monitor pattern tests.
The following example shows a FrameSaver DSL CSU/DSU’s PVC Test screen,
with the multiplexed DLCI 550 selected. If the DSL router or a standard DLCI was
selected, (Disruptive) rather than (Non-Disruptive) displays after Test, and
the Connectivity test does not appear.
PVC Tests Screen Example
NOTE:
Errors encountered during these tests may be caused by mismatched CIRs in
the two FrameSaver units. If errors are detected, verify the CIR configuration
and retest.
main/test/network_pvc 9783-C-SLV
Device Name: Node A 2/26/2001 08:03
Net1-FR1 PVC TESTS
DLCI Number: 550
Test (Non-Disruptive) Command Status Result
PVC Loopback: Start Inactive 0:00:00
Send Pattern: Start Inactive 0:00:00
Monitor Pattern: Start Inactive 0:00:00
Sequence Errors 99999+
Data Errors 99999+
Connectivity: Start Inactive RndTrip Time(ms) 99999
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