Device Physical Tests - PVC

PVC tests can be run on a requested DLCI for a selected interface. The iMarc unit must be operating in frame relay mode.

When PVC tests are on a multiplexed DLCI between iMarc devices, they are nondisruptive to data, so user data can continue to be sent during a test.

If the device at one end of the circuit is not a iMarc device, PVC tests are on a standard DLCI and are disruptive to data.

Loopback and send/monitor pattern tests are available for each interface on the selected DLCI if iMarc devices are 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.

Physical Tests for PVCs include the following. Refer to the appropriate device manual for specific information:

PVC Loopback

The PVC Loopback loops frames back to the selected interface on a per-PVC basis. This test logically loops back frames received from another iMarc device through the selected frame relay PVC to the same device.

 

Send Pattern

This test sends packets filled with a hexadecimal 55 test pattern and sequence number over the selected interface and DLCI to another iMarc device.

If the selected DLCI is configured as . . .

Then the test is . . .

And the default rate is . . .

Standard

Disruptive

100 Percent of CIR

Multiplexed

Nondisruptive

10 Percent of CIR

If the CIR is zero, the pattern is sent at a rate of 1000 bps.

Monitor Pattern

This test monitors packets filled with a hexadecimal 55 test pattern and sequence number over the selected interface and DLCI to another iMarc device.

The current number of sequence and data errors are shown when the iMarc unit is synchronized. An Out of Sync message appears when 5 frames out of 25 are missing or out of sequence.

These error counts are updated every second. If the maximum count is reached, 99999+ appears in these fields.

Related Topics:
Circuit Tests

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