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  Viewing Connectivity Fault Management Properties
Step 6Click the Remote Maintenance End Points tab to view the information displayed for remote MEPs. 
See Figure 19-5.
Figure 19-5 Remote Maintenance End Points Table 
MAC Address  MAC address that identifies the MEP.
Interface Interface on which the MEP is configured, hyperlinked to the 
respective EFP, VSI or interface in inventory.
Continuity Check Status CFM continuity check status: MEP Active, MEP Inactive, MEP 
Enabled, MEP Disabled, or Unknown. 
Direction Direction of traffic on which the MEP is defined: Up, Down, or 
Unknown.
Table 19-4 CFM Maintenance Association Properties (continued)
Field Description 
						

							  
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  Viewing Ethernet LMI Properties
Table 19-5 describes the information presented for remote MEPs.
Viewing Ethernet LMI Properties 
Ethernet Local Management Interface (E-LMI) is a protocol that operates between the customer edge 
(CE) network element and the provider edge (PE) network element. Ethernet LMI is a protocol between 
the CE network element and the provider edge (PE) network element. It runs only on the PE-CE UNI 
link and notifies the CE of connectivity status and configuration parameters of Ethernet services 
available on the CE port. Ethernet LMI interoperates with an OAM protocol, such as CFM, that runs 
within the provider network to collect OAM status. CFM runs at the provider maintenance level. 
Ethernet LMI relies on the OAM Ethernet Infrastructure (EI) to work with CFM for end-to-end status of 
EVCs across CFM domains. E-LMI commands are described in Configuring E-LMI, page 19-18.
The IOS OAM manager stream4.3.2 interaction between OAM protocols, and handles the interaction 
between CFM and E-LMI. Ethernet LMI interaction with the OAM manager is unidirectional, running 
only from the OAM manager to E-LMI on the U-PE side of the switch. Information is exchanged either 
as a result of a request from E- LMI or triggered by the OAM manager when it receives notification of 
a change from the OAM protocol. Information that is relayed includes the EVC name and availability 
status, remote UNI name and status, and remote UNI counts.
To view Ethernet LMI properties: 
Step 1In the Vision client, double-click the device configured for Ethernet LMI. 
Step 2In the Inventory window, choose Logical Inventory > Ethernet LMI. 
Figure 19-6 shows an example of Ethernet LMI properties in logical inventory. 
Table 19-5 CFM Remote Maintenance End Points Table
Field Description
MEP ID Remote MEP identifier.
Level Level at which the remote MEP is managed: 0-7.
Status Status of the remote MEP, such as MEP Active.
MAC Address MAC address of the remote MEP.
Local MEP ID Numeric identifier assigned to the local MEP. Values range from 1 to 
8191.
NoteIf the remote MEP is in Up mode, the remote MEP is not 
associated to the local MEP. As a result, the Local MEP ID 
column is empty. 
						

							  
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Figure 19-6 Ethernet LMI in Logical Inventory
Table 19-6 describes the information displayed for Ethernet LMI. 
Table 19-6 Ethernet LMI Properties in Logical Inventory
Field Description
Globally Enabled Whether or not Ethernet LMI is enabled globally: True or False.
Mode Ethernet LMI mode: CE or PE.
Device EVCs Tab
EVC Name Name of the EVC. 
EVC Type Type of EVC: Point-to-point or Multipoint.
EVC Status EVC status: Active, Inactive, Not Defined, or Partially Active.
Maintenance Association Hyperlinked entry to the maintenance association in CFM in logical 
inventory. For more information about maintenance associations, see 
Ta b l e 1 9 - 4. 
Active Remote UNI Count Number of active remote UNIs.
Configured Remote UNI 
CountNumber of configured remote UNIs.
ELMI Interfaces Tab
Interface Name Hyperlinked entry to the interface in physical inventory. For more 
information, see Step 4 in this procedure. 
T391 Frequency at which the customer equipment sends status inquiries. The 
range is 5-30 seconds, with a default of 10 seconds.
T392 Frequency at which the metro Ethernet network verifies that status 
enquiries have been received. The range is 5-30 seconds, with a default 
of 15 seconds. A value of 0 (zero) indicates the timer is disabled.  
						

							  
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  Viewing Ethernet LMI Properties
Step 3To view device EVC properties, double-click an EVC name in the Device EVCs tab. 
The Device EVC Properties window is displayed as shown in Figure 19-7. 
Figure 19-7 Device EVC Properties Window
Table 19-7 describes the information displayed in the Device EVC Properties window. N391 Frequency at which the customer equipment polls the status of the UNI 
and all EVCs. The range is 1-65000 seconds, with a default of 360 
seconds. 
N393 Error count for the metro Ethernet network. The range is 1-10, with a 
default of 4. 
Table 19-6 Ethernet LMI Properties in Logical Inventory (continued)
Field Description
Table 19-7 Device EVC Properties in Logical Inventory
Field Description
EVC Name Name of the EVC. 
EVC Type Type of EVC: Point-to-point or Multipoint.
EVC Status EVC status: Active, Inactive, Not Defined, or Partially Active.
Maintenance Association Hyperlinked entry to the maintenance association in CFM in logical 
inventory. For more information about maintenance associations, see 
Table 19-4. 
Active Remote UNI Count Number of active remote UNIs.
Configured Remote UNI 
CountNumber of configured remote UNIs. 
						

							  
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  Viewing Link OAM Properties
Step 4To view properties for an Ethernet LMI interface in physical interface, click the required interface name 
in the ELMI Interfaces table.
Table 19-8 describes the information displayed in the UNI Properties area in physical inventory.
Viewing Link OAM Properties
Link OAM is an optional sublayer implemented in the OSI Data Link Layer between the Logical Link 
Control and MAC sublayers. Link (802.3AH) OAM (L-OAM) can be implemented on any full-duplex 
point-to-point or emulated point-to-point Ethernet link. 
The frames (OAM Protocol Data Units [OAMPDUs]) cannot propagate beyond a single hop within an 
Ethernet network and have modest bandwidth requirements (frame transmission rate is limited to a 
maximum of 10 frames per second).
Link OAM processes include:
Discovery—Discovery is the first Link OAM process. During discovery, Link OAM identifies the 
devices at each end of the link and learns their OAM capabilities.
Link monitoring—Link OAM link monitoring includes: 
–Monitoring links and issuing notifications when error thresholds are exceeded or faults occur. 
UNI Interfaces Table
UNI Id UNI identifier.
UNI Status Status of the UNI: Up or Down.
LMI Link Status Status of the LMI link: Up or Down.
Interface Name Interface on which UNI is configured.
Is UNI Local Whether or not UNI is local: True or False.
Local Interface Hyperlinked entry to the interface in physical inventory.
VLAN List Name of the VLAN associated with the UNI interface.
Table 19-7 Device EVC Properties in Logical Inventory (continued)
Field Description
Table 19-8 Ethernet LMI UNI Properties in Physical Inventory
Field Description
Service Multiplexing Enabled Whether or not the interface is configured for UNI 
multiplexing: True or False.
Bundling Enabled Whether or not the interface is configured for UNI bundling: 
True or False.
UNI Id UNI identifier.
Bundling Type Type of bundling applied: All-to-One or None.
This field appears only when a bundling type is set. 
						

							  
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–Collecting statistics on the number of frame errors (or percent of frames that have errors) and 
the number of coding symbol errors.
Remote MIB Variable Retrieval—Provides 802.3ah MIB polling and response.
Remote Failure indication—Informs peers when a received path goes down. Because link 
connectivity faults caused by slowly deteriorating quality are difficult to detect, Link OAM 
communicates such failure conditions to its peer using OAMPDU flags. The failure conditions that 
can be communicated are a loss of signal in one direction on the link, an unrecoverable error (such 
as a power failure), or some other critical event.
Remote Loopback—Puts the peer device in (near-end) intrusive loopback mode using the OAMPDU 
loopback control. Statistics can be collected during the link testing. In loopback mode, every frame 
received is transmitted back unchanged on the same port (except for OAMPDUs, which are needed 
to maintain the OAM session). Loopback mode helps ensure the quality of links during installation 
or troubleshooting. Loopback mode can be configured so that the service provider device can put 
the customer device into loopback mode, but the customer device cannot put the service provider 
device in loopback mode.
Prime Network supports topology discovery based on Link OAM information and enables you to view 
Link OAM properties. You can also configure L-OAM using the commands described in Configuring 
L-OAM, page 19-18.
For information on CFM and Ethernet LMI, see Viewing Connectivity Fault Management Properties, 
page 19-2 and Viewing Ethernet LMI Properties, page 19-8.
To view Link OAM properties: 
Step 1In the Vision client, double-click the device configured for Link OAM. 
Step 2In the Inventory window, choose Logical Inventory > OAM.  
						

							  
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  Viewing Link OAM Properties
Figure 19-8 shows an example of Link OAM properties in logical inventory. 
Figure 19-8 Link OAM Properties in Logical Inventory
Table 19-9 describes the information displayed for Link OAM. 
Table 19-9 Link OAM Properties in Logical Inventory
Field Description
Table Types Type of table. In this case, it is OAM.
OAM Table
Local Port Name of the OAM-supported interface, hyperlinked to the location 
in physical inventory.
Local Port ID Local port identifier, such as FastEthernet1/0/9.
Admin Status Administrative status of the interface.
Port Status Status of the port.
Remote MAC Address Remote client MAC address.  
						

							  
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Step 3To view detailed information about an entry in the table, double-click the required entry. 
The Link OAM Data Properties window is displayed as shown in Figure 19-9. 
Figure 19-9 Link OAM Data Properties Window
Table 19-10 describes the information that is displayed in the Link OAM Data Properties window. 
Table 19-10 Link OAM Data Properties Window
Field Description
Local Interface 
Local Port Name of the OAM-supported interface, hyperlinked to the location 
in physical inventory.
Local Port ID Local port identifier.
Admin Status Administrative status of the interface: Up or Down.
Port Status Status of the port, such as Operational. 
PDU Max Rate (Frames/sec) Maximum transmission rate measured by the number of OAM 
PDUs per second; for example, 10 packets per second.
PDU Min Rate 
(Seconds/frame)Minimum transmission rated measured by the number of seconds 
required for one OAM PDU; for example, 1 packet per 2 seconds.
Link  Timeout Number of seconds of inactivity on a link before the link is dropped. 
High Threshold Action Action that occurs when the high threshold for an error is exceeded. 
Link Fault Action Action that occurs when the signal is lost.  
						

							  
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  Viewing Link OAM Properties
Step 4To view Link OAM status in physical inventory, choose Physical Inventory >chassis>slot>interface. 
The Link OAM administrative status is displayed as shown in Figure 19-10. Dying Gasp Action Action that occurs when an unrecoverable condition is encountered.
Critical Event Action Action that occurs when an unspecified vendor-specific critical 
event occurs.
Mode Mode of the interface: Active or Passive.
Unidirection Status of unidirectional Ethernet on the local interface: Supported 
or Not supported. 
Link Monitor Status of link monitoring on the local interface: Supported or Not 
supported.
Remote Loopback Status of remote loopback on the local interface: Supported or Not 
supported. 
Loopback Status Status of loopback on the local interface: Supported or No 
loopback. 
Remote Client 
MAC Address MAC address for the remote client.
Vendor Vendor of the remote client.
Mode Mode of the remote client: Active or Passive.
Unidirection Status of unidirectional Ethernet on the remote client interface: 
Supported or Not supported. 
Link Monitor Status of link monitoring on the remote client interface: Supported 
or Not supported.
Remote Loopback Status of loopback on the remote client interface: Supported or Not 
supported. 
Table 19-10 Link OAM Data Properties Window (continued)
Field Description 
						

							  
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  Configuring CFM
Figure 19-10 Link OAM Administrative Status in Physical Inventory
Configuring CFM
The following CFM-related commands can be launched from the inventory by right-clicking a CFM 
node and choosing Commands > Configuration. Your permissions determine whether you can run 
these commands (see Permissions for Using Ethernet OAM Tools, page B-17). To find out if a device 
supports these commands, see the Cisco Prime Network 4.3.2 Supported Cisco VNEs.