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The steps required to set up Connectivity Fault Management (CFM) are:
- Set up Maintenance Domains (MD).
- Set up Maintenance Associations (MA), also known as Maintenance Entity Groups (MEG).
- Set up Maintenance association End Points (MEP).
Viewing CFM Summary
The CFM summary can be displayed whether the remote device context has been set or not.
If the remote device context has not been set, the CFM library version for all remote devices will be displayed. If the remote device context has been set, then only the information related to the selected device will be displayed.
To view CFM summary
- Access the page SOAM ▶ CFM ▶ Summary.
A list of all CFM instances and their settings is displayed.
For more information on specific parameters, refer to the following table.
CFM Summary (SOAM ▶ CFM ▶ Summary)
Parameter | Description |
---|---|
Remote device | Remote device name. This is user configurable. By default, the remote device name is the device's serial number. |
Library | SOAM library version of the remote-device (either v1 or v2) |
#Domain | Maintenace Domain |
#Ma | Maintenance association |
#Mep | Maintenance association end point |
#PL | Packet loss |
#DMM | Delay measurements |
#SLM | Synthetic Loss Measurements |
DMM | Reflector Enabled or Disabled |
Configuring the CFM library
The CFM library can be configured (either v1 or v2) to be used for the selected remote device.
Note: The remote-device context has to be set prior to configuring the CFM library (or any CFM configuration for v2 library). For the v1 library, context is not required and can be set at "None".
To configure the CFM library
Access the page SOAM ▶ CFM ▶ Summary.
A list of all CFM instances and their settings is displayed.Click the Library of an exiting CFM instance to display the SOAM library configuration window.
Select the library version then click Apply.
For more information on specific parameters, refer to the following table.
CFM Stack (SOAM ▶ CFM ▶ Summary)
Parameter | Description |
---|---|
Remote device | Remote device name. |
Library | Library version of the selected remote-device (either v1 or v2). The SOAM library version (v1) supports one MEP per device. No Packet Loss, DMM and SLM. It also support the DMM reflection. The v2 library supports multiple MEP, DMM, SLM and Packet loss. On demand DMM reflection without MEP validation is not supported. |
Viewing CFM Instances
To view CFM instances
- Access the page SOAM ▶ CFM ▶ Stack.
A list of all CFM instances and their settings is displayed.
For more information on specific parameters, refer to the following table.
CFM Stack (SOAM ▶ CFM ▶ Stack)
Parameter | Description |
---|---|
Port | The port on which MEPs or MIPs have been configured |
VID | The VLAN ID to which the Maintenance Point is attached, or 0, if there is no VLAN ID |
Level | The MD level (or MEG level) of the Maintenance Point Possible values: 0-7 |
Dir | The direction in which the MEP or MIPs faces on the port |
MD idx | The index of the Maintenance Domain with which the MEP or MIP is associated |
MA idx | The index of MA (or MEG) with which the MEP or MIP is associated |
MEPID | The MEPID of the MEP or MIP (MEPID of MIP is 0) |
MAC Address | The MAC address of the Maintenance Point |
There are eight pseudo MDs defined by default, one for each level, named Y.1731 level 0 to Y.1731 level 7. These MDs exist only to simplify the integration of MEGs for Y.1731 with the CFM MIB, which requires MDs. The Y.1731 protocol uses MEG-IDs, which are MAIDs without an MD name. User interfaces show the pseudo MD name, but this name is not included in the Y.1731 CCM's MEG-ID.
Note: Pseudo MDs cannot be deleted from the system.
Setting Up Maintenance Domains (MD)
To set up a Maintenance Domain
Access the page SOAM ▶ CFM ▶ MD.
A listing of all existing Maintenance Domains is displayed.Click the Add button to create a new Maintenance Domain.
You can also click the Name of an existing Maintenance Domain to either Apply, Reset or Delete it.Complete the required fields, then click Apply.
For more information on specific parameters, refer to the following table.
Maintenance Domain (SOAM ▶ CFM ▶ MD)
Parameter | Description |
---|---|
Name Format | The format of the Maintenance Domain name. The only supported value is:
The name format must be the same for the other end points. |
Name MD Name | Unique name for the maintenance domain. |
Level | Maintenance Level of the Maintenance Domain. Possible values: 0-7 |
Deleting a Maintenance Domain (MD)
To delete a maintenance domain
Access the page SOAM ▶ CFM ▶ MD.
A listing of all existing Maintenance Domains is displayed.Click the name of the MD instance to be deleted.
Click Delete.
CAUTION: Deleting an MD will also delete all instances (e.g. MA/MEG) that use this MD.
Setting Up Maintenance Associations (Maintenance Entity Groups)
Before setting up an MA (also referred to as a MEG), you must first set up the MD to which you want the MA/MEG to belong. Maintenance Associations (MA) are discussed in IEEE 802.1ag; Maintenance Entity Groups (MEG) are discussed in ITU-T Y.1731.
To set up a Maintenance Association or Maintenance Entity Group
Access the page SOAM ▶ CFM ▶ MA/MEG.
A listing of all Maintenance Associations / Maintenance Entity Groups is displayed.Click the Add button to add a new Maintenance Association or Maintenance Entity Group or click the Name of an existing Maintenance Association or Maintenance Entity Group to apply, reset or delete it.
Complete the required fields, then click Apply.
For more information on specific parameters, refer to the following table.
Maintenance Association (SOAM ▶ CFM ▶ MA/MEG)
Parameter | Description |
---|---|
MA/MEG Index Index | Unique index value assigned to the Maintenance Association or Maintenance Entity Group |
MD Index | The index value assigned to the Maintenance Domain for this MEP |
MD Name | The name of the Maintenance Domain for this MEP |
Name Format | The format of the Maintenance Association or Maintenance Entity Group name Possible values are:
|
Name MA/MEG Name | The name of this Maintenance Association or Maintenance Entity Group |
Level | Maintenance Level of the Maintenance Association or Maintenance Entity Group Possible values: 0-7 |
CCM interval | The required time interval between Continuity Check Messages (CCM). Expressed in milliseconds. Default: 1000 milliseconds |
VCA-VLAN Name | The VCA-VLAN Name refers to the Virtual Connection defined by the VCA-VLAN configuration. |
VLAN-TP | The reference point (VLAN-TP) within the VCA-VLAN, on which the MA/MEG is associated. Values:
|
Use VCE | Select this box to enable VCE for use. When enabled, another field is shown: VCE Name allowing you to select the VCE to use. Note: This parameter is not configurable when using VCA-VLAN. |
VCE Name | Type the name of the VCE you wish to use. Note: This parameter is not configurable when using VCA-VLAN. |
VLAN ID list | A list of the VLANs associated with this Maintenance Association or Maintenance Entity Group. If you leave the VLAN ID field empty, the association is not attached to a VLAN. |
Remote MEP Autodiscovery | Select this box to enable the Remote MEP Auto-Discovery feature for this Maintenance Association or Maintenance Entity Group. When enabled, remote MEPs are automatically added to the MA/MEG as soon as the remote MEP's CCM message is received. Note: You must manually refresh the page to view any remote MEPs that have been discovered since the page was initially loaded. |
MEPID list Sensor SFP 1G and Sensor Module 1G supports a list up to 100 MEPIDs. | A comma-separated list of all the MEPs that are associated with this Maintenance Association or Maintenance Entity Group. Typically, when two MEP are added to a MA/MEG, it is usually because you are creating an E-Line type of service, based on a point-to-point EVC. In contrast, adding multiple MEP is for when you are creating an E-LAN type of service, based on a rooted multipoint EVC. If the Remote MEP Auto-Discovery feature for this Maintenance Association or Maintenance Entity Group is enabled, the list of MEPIDs will be presented in numerical order, not the order in which the MEPs are discovered. |
To delete a Maintenance Association (Maintenance Entity Group)
- Access the page SOAM ▶ CFM ▶ MA/MEG.
A listing of all Maintenance Associations / Maintenance Entity Groups is displayed. - Click the name of the Maintenance Association or Maintenance Entity Group to be deleted.
- Click Delete.
CAUTION: Deleting a MA/MEG will also delete all instances (e.g. MEP) that use this MA/MEG.
Setting Up Maintenance Association End Points
Before setting up a MEP, you must first set up its MA/MEG. Maintenance association End Points (MEP) are discussed in IEEE 802.1ag.
To set up a Maintenance association End Point
Access the page SOAM ▶ CFM ▶ MEP ▶ Configuration.
A listing of all Maintenance association End Points is displayed.Click the Add button to add a new MEP or click the MEPID of an existing MEP to apply, reset or delete its settings.
Complete the required fields, then click Apply.
Note: Users can undo the current changes by clicking Reset to restore the values prior to making any changes. The Delete operation is described on the next page.
For more information on specific parameters, refer to the following table.
Maintenance association End Point (SOAM ▶ CFM ▶ MEP ▶ Configuration)
Parameter | Description |
---|---|
MEP Index | The index value assigned to the Maintenance association End Point |
MD Index | The index value assigned to the Maintenance Domain for this MEP |
MD Name | The name of the Maintenance Domain for this MEP |
MAC address | The MAC address of the maintenance domain |
MA/MEG Index | The index value of the maintenance association (or MEG) to associate with the MEP |
MA/MEG Name | The name of the maintenance association (or MEG) to associate with the MEP |
MEPID | Maintenance association End Point Identifier (MEPID) for this Maintenance association. This value is an integer, unique to each MA, that identifies a specific MEP in CCM frames. |
VCE port | If the MA/MEG is associated with a VCA-VLAN configuration or a VCE configuration (legacy), the checkbox is greyed-out, but it is automatically checked when you associate it with a MA/MEG. The user can not select this. |
VCE Name | The name of the VCE that you wish to use |
TP | A pull-down menu with a limited selection: tp-a or tp-z. Select the desired terminal point. |
Port | The port used by this MEP. Note: This option only visible if the MA/MEG was created using a VCE. |
Direction | The direction in which the MEP faces on the Bridge port. Refer to IEEE802.1ag for more information.
|
MEP Name | The name of the Maintenance association End Point. |
Active | The administrative state of the MEP:
Note: When deactivating a MEP, you must also deactivate all DMM, SLM and Frame Loss instances that use this MEP. Doing so will stop the unit from sending DMM and SLM frames and prevent the units from detecting unwanted alarms, such as CCM alarms. |
CCI Enable | Indicates whether or not the MEP generates CCM messages:
|
CCM Sequence Number | When enabled, a MEP transmits CCMs with a sequence number that increases by one for each CCM. When disabled, a MEP transmits CCMs with a sequence number set to zero. Note: A peer MEP should have the sequence number enabled to allow a local MEP to perform CCM-based frame loss measurements. |
Primary VID VLAN | The Primary VLAN ID of the MEP. This is always one of the VLAN IDs assigned to the MEP's MA/MEG. The value 0 indicates that either the Primary VLAN ID is that of the MEP's MA/MEG, or that the MEP's MA/MEG is not associated with a VLAN ID. |
CCM, LTM and CSF Priority | Priority parameter for CCMs, LTMs and CSFs transmitted by the MEP. The possible values are 0-7, with 7 being the highest value allowed to pass through the Bridge Port for any of this MEP's VLAN IDs. Default value: 7 (highest priority) |
Lowest Priority Defect Alarm | Lowest priority defect that is allowed to generate a CFM Fault Alarm. |
Fault Notification | The period of time for which defects must be present before a Fault |
Alarm Time | Alarm is issued. Valid values are multiples of 100 milliseconds, e.g., 2100. |
Fault Notification Reset Time | The period of time for which defects must be absent before resetting a Fault Alarm. Valid values are multiples of 100 milliseconds, e.g., 2100. |
CCM Priority | Priority parameter for CCM transmitted by the MEP. The possible values are 0-7, with 7 being the highest value allowed to pass through the Bridge Port for any of this MEP's VLAN IDs. Default value: 7 (highest priority) |
CSF Enable | Enables this MEP to transmit Ethernet Client Signal Failure (ETHCSF) to its peer MEP upon the detection of a failure or defect event in the Ethernet client signal. That port should also be set up to perform EVC fault propagation. This feature works only on an Up Mep. Note: ETH-CSF is not available using the V1 library and for ETH-CSF to cause the Fault to be Propagated requires that FP be enabled in the Port Configuration. Note: A MA/MEG with more than two end points cannot be used. |
EVC-FP enable | When checked on an MEP instance, a Remote CCM defect causes a fault (link-down) to be propagated to the UNI port. Note: This field only appears for supported modules. You must check CSF Enable to configure this field. |
To delete a Maintenance association End Point
Access the page SOAM ▶ CFM ▶ MEP ▶ Configuration.
A listing of all Maintenance association End Points is displayed.Click the MEPID of the MEP to be deleted.
Click Delete.
Viewing MEP Status
To view maintenance association end point (MEP) status
Access the page SOAM ▶ CFM ▶ MEP ▶ Status.
A listing of all MEPs is displayed, along with their status codes and details.
The total number of MEPs found in the system is given in the lower left corner of the page, as well as the index values of the items currently displayed on-screen (for example, [1-25] of 54). Use the page navigation links in the lower-right corner of the page to move between the pages of results.
(Optional) To limit the view to only certain MEPs, enter a value on which to filter, then click Search. You can filter by the MEP name, MEPID, Database, RDI or R-CCM status code value. If the MA/MEG was created using a VCA-VLAN/VCE, you can filter by the MEP Index, MEPID, Database, RDI, MAC, R-CCM, E-CCM, X-CCM, AIS, EPL, EDM, C-LOS, C-FDI, C-RDI, N-SLM and F-SLM status code values.
Note: Enter an asterisk ( * ) as a wildcard to replace one or several characters.
For more information on specific codes, refer to the following table.
MEP Status (SOAM ▶ CFM ▶ MEP ▶ Status)
Parameter | Description |
---|---|
Index | Index assigned to the Maintenance association End Point |
Name | The name assigned to this Maintenance association End Point |
MEPID | Identifier for the Maintenance association End Point |
DB | Link to this MEP's database. |
RDI CCM RDI | The latest CCM received by this MEP from a remote MEP containing the Remote Defect Indication (RDI) bit Possible values are Active (A) or Inactive (I). |
MAC MAC Status | The last CCM received by this MEP from a remote MEP indicates that the transmitting MEP's associated MAC is reporting an error status via the Port Status TLV or Interface Status TLV. Possible values are Active (A) or Inactive (I). |
R-CCM Remote CCM | Indicates whether the MEP is not receiving CCMs from a MEP in its configured list. Possible values are Active (A) or Inactive (I). |
E-CCM Errored CCM | Indicates whether the MEP is receiving invalid CCM messages Possible values are Active (A) or Inactive (I). |
X-CCM Cross-Connect CCM | Indicates whether the MEP is receiving CCM messages that could be coming from another MA Possible values are Active (A) or Inactive (I). |
AIS Received AIS | Indicates whether Y.1731 Alarm Indication Signal (AIS) PDUs are being received Possible values are Active (A) or Inactive (I). |
EPL Excessive Packet Loss | Indicates whether some packet loss measurement defect is Active (A) or Inactive (I) for that MEP |
EDM Excessive Delay | Indicates whether some delay measurement defect is Active (A) or Inactive (I) for that MEP |
N-SLM (Near end loss) | The Near-End Synthetic Loss Measurement indicates whether near-end synthetic loss messages are Active (A) or Inactive (I) for that MEP |
F-SLM (Far end loss) | The Far-End Synthetic Loss Measurement indicates whether farend synthetic loss messages are Active (A) or Inactive (I) for that MEP |
C-LOS Received C-LOS | Indicates that Y.1731 Client Signal Fail (CSF) Loss of Signal (LOS) PDUs are being received. Possible vales are Active (A) or Inactive (I). |
C-FDI Received C-FDI | Indicates that Y.1731 Client Signal Fail (CSF) Forward Defect Indication (FDI) PDUs are being received. Possible vales are Active (A) or Inactive (I). |
C-RDI Received C-RDI | Indicates that Y.1731 Client Signal Fail (CSF) Reverse Defect Indication (RDI) PDUs are being received. Possible vales are Active (A) or Inactive (I). |
To view maintenance association end point (MEP) status
Access the page SOAM ▶ CFM ▶ MEP ▶ Status.
A listing of all MEPs is displayed, along with their status codes and details.
The total number of MEPs found in the system is given in the lower left corner of the page, as well as the index values of the items currently displayed on-screen (for example, [1-25] of 54). Use the page navigation links in the lower-right corner of the page to move between the pages of results.
(Optional) To limit the view to only certain MEPs, enter a value on which to filter, then click Search. You can filter by the MEP name, MEPID, Database, RDI or R-CCM status code value. If the MA/MEG was created using a VCA-VLAN/VCE, you can filter by the MEP Index, MEPID, Database, RDI, MAC, R-CCM, E-CCM, X-CCM, AIS, EPL, EDM, C-LOS, C-FDI, C-RDI, N-SLM and F-SLM status code values.
Note: Enter an asterisk ( * ) as a wildcard to replace one or several characters.
For more information on specific codes, refer to the following table.
MEP Status (SOAM ▶ CFM ▶ MEP ▶ Status)
Parameter | Description |
---|---|
Index | Index assigned to the Maintenance association End Point |
Name | The name assigned to this Maintenance association End Point |
MEPID | Identifier for the Maintenance association End Point |
DB | Link to this MEP's database. |
RDI CCM RDI | The latest CCM received by this MEP from a remote MEP containing the Remote Defect Indication (RDI) bit Possible values are Active (A) or Inactive (I). |
MAC MAC Status | The last CCM received by this MEP from a remote MEP indicates that the transmitting MEP's associated MAC is reporting an error status via the Port Status TLV or Interface Status TLV. Possible values are Active (A) or Inactive (I). |
R-CCM Remote CCM | Indicates whether the MEP is not receiving CCMs from a MEP in its configured list. Possible values are Active (A) or Inactive (I). |
E-CCM Errored CCM | Indicates whether the MEP is receiving invalid CCM messages Possible values are Active (A) or Inactive (I). |
X-CCM Cross-Connect CCM | Indicates whether the MEP is receiving CCM messages that could be coming from another MA Possible values are Active (A) or Inactive (I). |
AIS Received AIS | Indicates whether Y.1731 Alarm Indication Signal (AIS) PDUs are being received Possible values are Active (A) or Inactive (I). |
EPL Excessive Packet Loss | Indicates whether some packet loss measurement defect is Active (A) or Inactive (I) for that MEP |
EDM Excessive Delay | Indicates whether some delay measurement defect is Active (A) or Inactive (I) for that MEP |
N-SLM (Near end loss) | The Near-End Synthetic Loss Measurement indicates whether near-end synthetic loss messages are Active (A) or Inactive (I) for that MEP |
F-SLM (Far end loss) | The Far-End Synthetic Loss Measurement indicates whether farend synthetic loss messages are Active (A) or Inactive (I) for that MEP |
C-LOS Received C-LOS | Indicates that Y.1731 Client Signal Fail (CSF) Loss of Signal (LOS) PDUs are being received. Possible vales are Active (A) or Inactive (I). |
C-FDI Received C-FDI | Indicates that Y.1731 Client Signal Fail (CSF) Forward Defect Indication (FDI) PDUs are being received. Possible vales are Active (A) or Inactive (I). |
C-RDI Received C-RDI | Indicates that Y.1731 Client Signal Fail (CSF) Reverse Defect Indication (RDI) PDUs are being received. Possible vales are Active (A) or Inactive (I). |
Viewing MEP Statistics
To view MEP statistics
Access the page SOAM ▶ CFM ▶ MEP ▶ Statistics.
A summary of statistics of all MEPs is displayed.Click any MEPID to view detailed statistics of this MEP.
For more information on specific parameters, refer to the following table.
MEP Statistics (SOAM ▶ CFM ▶ MEP ▶ Statistics)
Parameter | Description |
---|---|
Index MEP Index | Index assigned to the Maintenance association End Point |
MEPID | Maintenance association End Point Identifier |
CCM Sent CCM | Indicates the number of connectivity check messages sent by this MEP |
CCM Received CCM | Indicates the number of connectivity check messages received by this MEP |
RDI Sent CCM with RDI | Indicates the number of connectivity check messages sent by this MEP with the RDI bit set |
RDI Received CCM with RDI | Indicates the number of connectivity check messages received by this MEP with the RDI bit set |
CCM Seq Error CCM Received Sequence Errors | Indicates the total number of out-of-sequence CCMs received from all remote MEPs |
DMR Priority Mismatch | Indicates the total number of DMRs received whose VLAN priority value did not match that of the corresponding DMM. |
Viewing the MEP Database
The MEP database gives you information about remote MEPs.
To view database information for MEPs
Access the page SOAM ▶ CFM ▶ MEP ▶ Status.
Click the MEP database identifier for which you want to view a summary.
Click any MEPID to view detailed database information.
For more information on specific parameters, refer to the following table.
MEP Database (SOAM ▶ CFM ▶ MEP ▶ Status ▶ [Database])
Parameter | Description |
---|---|
MEPID | Maintenance association End Point identifier of the remote MEP whose information from the MEP Database is to be returned |
State | The operational state of the remote MEP IFF state machines Possible values are:
|
RDI | The state of the RDI bit in the last received CCM. Possible values are:
|
Mac Address | The MAC address of the remote MEP |
R-CCM | Remote CCM. Indicates whether the MEP is not receiving CCMs from a MEP in its configured list. |
Latest Failed-OK Time | The time at which the IFF Remote MEP state machine last entered either the failed or OK state |
Port Status TLV | The value of the port status TLV received in the last CCM from the remote MEP (see Port Status TLV of 802.1ag for details) Possible values are:
|
Interface Status TLV | The value of the interface status TLV received in the last CCM from the remote MEP (see Interface Status TLV of 802.1ag for details) Possible values are:
|
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