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# VLOOP/VBERT

#### Avg Transit Delay

#### DE%

#### DLCI Number

#### Elapsed Time

#### IP Address

#### Port

#### Rate

#### Rx DE Clear Frames

#### Rx DE Set Frames

#### Size

#### Status

#### Test Description

#### Test Period

#### Test Type

#### Tx DE Clear Frames

#### Tx DE Set Frames

#### VLOOP/VBERT is a 3.0 TFRAP, SFRAP, or DFRAP feature

#### VLOOP allows the user to implement single or multiple logical loop backs on a per PVC basis.

#### VLOOP allows the user to test locally generated traffic to verify the integrity of the link.

#### Tests are designed as independent functions that can be used alone or in conjunction to provide the required Non-Intrusive (VBERT) and/or Intrusive (VLOOP) results required by the operator.

#### Configurable Parameters:

#### Rate

  Defines the bytes sent in Kbps. Ranges must be in multiples of Kbps
  Range: 8 ~ 2048 Kbps
  Default: Kbps

#### Size

  Defines the size in bytes
  Range: Small=64, Medium1=256, Medium2=512, Medium3=1024, of Large=2048
  Default: Small=64

#### DE %

  Defines the percentage of VBERT packets that have the DE bit set.
  Range: 0~100% (multiples of 25%)
  Default: 50%

#### Test Period

  Defines the length in seconds the VBERT test will run.
  Range: 10 Sec, 30sec, 1 Min, 2 Min, 5 Min, 10 Min, 15 Min, 20 Min, or 24 Min.
  Default: 30sec

#### Test Type

  Defines the type of test to be run
  Range: VLOOP or VBERT

#### Display Parameters (not configurable):

#### Test Description

  Describes the loop back and any usage warnings along with what loop back is enabled (if any).

#### Results

  Port: Type of port.
  DLCI Number: Number of the test DLCI.
  IP Address: Remote address designation.
  Status: Displays the status of the VLOOP/VBERT test (Off, In-Test, Test failed, and Test-Completed)
  Elapsed Time: Elapsed time since VBERT Test was started or cleared.
  Tx DE Set Frames: Displays the number of transmitted frames during a VBERT test that had the Discard Eligibility indicator bit was set.
  Rx DE Set Frames: Displays the number of received frames during a VBERT test that had the Discard Eligibility indicator bit was set.
  Tx DE Clear Frames: Displays the number of transmitted frames during a VBERT test that had the Discard Eligibility indicator bit was cleared.
  Rx DE Clear Frames: Displays the number of received frames during a VBERT test that had the Discard Eligibility indicator bit was cleared.
  Avg Transit Delay: Average transit delay between the node and the remote peer during a VBERT test