Trigger a Loopback Test
Before you begin
On the source and destination nodes, you must configure a CFM MD, MA, and MEP.
Enable the MEP.
Assign a nodal MEP to the B-VLAN.
About this task
Use this procedure to trigger a loopback test.
The LBM packet is often compared to ping. An MEP transmits the loopback message to an intermediate or endpoint within a domain for the purpose of fault verification. Use this function to check the ability of the network to forward different sized frames.
Procedure
- In the navigation pane, expand .
- Select CFM.
- Select the LBM tab.
- Configure the loopback test properties as required.
- Select Apply.
- In Status, select transmit.
- Select Apply.
- Select Refresh.
LBM Field Descriptions
Use the data in the following table to use the LBM tab.
Name |
Description |
---|---|
DomainIndex |
Specifies the MD index value. |
AssociationIndex |
Specifies the MA index value. |
Index |
Specifies the Maintenance Endpoint index value. |
DomainName |
Specifies the MD name. |
AssociationName |
Specifies the MA name. |
DestMacAddress |
Specifies the remote MAC address to reach the MEP/MIP. |
Messages |
Specifies the number of loopback messages to be transmitted. The default is 1. |
VlanPriority |
Specifies the priority. The default is 7. |
SeqNumber |
Specifies the transaction identifier/sequence number of the first loopback message (to be) sent. The default is 0. |
ResultOk |
Indicates the result of the operation:
The default is true. |
Status |
Indicates the status of the transmit loopback service:
The default is ready. |
Result |
Displays the LBM result. |
TimeoutInt |
Specifies the timeout interval in seconds. The default value is 3 seconds. |
InterFrameInt |
Specifies the interval between LBM frames with a range of (0..1000) msecs and a default value of 500 msecs. The value of 0 msecs indicates to send the frames as fast as possible. The default is 500. |
TestPattern |
Specifies the testfill pattern:
A cyclic redundancy check is a code that detects errors. The default value is allZero. |
DataSize |
Specifies the data type-length-value (TLV) size. The default is 0. |
FrameSize |
Specifies the frame-size. The default is 0. |
Sourcemode Note:
Exception: smltVirtual is not supported on 5320 Series. |
Specifies the source mode of the transmit loopback service:
The default is nodal. |