Chapter 17 Diagnostic
VMG4005-B50A/B60A User’s Guide
61
17.5 802.3ah (OAM)
Click Maintenance > Diagnostic > 803.ah to open the following screen. Link layer Ethernet OAM
(Operations, Administration and Maintenance) as described in IEEE 802.3ah is a link monitoring protocol.
It utilizes OAM Protocol Data Units (OAM PDU’s) to transmit link status information between directly
connected Ethernet devices. Both devices must support IEEE 802.3ah.
Figure 44 Maintenance > Diagnostic > 802.3ah
MD Name Enter a descriptive name for the MD (Maintenance Domain).
MA ID Enter a descriptive name to identify the Maintenance Association.
MEG ID Enter a descriptive name to identify the Maintenance Entity Group. This field only appears if the
Y.1731 field is enabled.
802.1Q VLAN ID Type a VLAN ID (1-4094) for this MA.
Local MEP ID Enter the local Maintenance Endpoint Identifier (1~8191).
CCM Select Enable to continue sending MEP information by CCM (Connectivity Check Messages).
When CCMs are received the VMG will always process it, whether CCM is enabled or not.
Remote MEP ID Enter the remote Maintenance Endpoint Identifier (1~8191).
Test the connection to another Maintenance End Point (MEP)
Destination
MAC Address
Enter the target device’s MAC address to which the VMG performs a CFM loopback and
linktrace test.
Test Result
Loopback
Message (LBM)
This shows Pass if a Loop Back Messages (LBMs) responses are received. If LBMs do not get a
response it shows Fail.
Linktrace
Message (LTM)
This shows the MAC address of MEPs that respond to the LTMs.
Apply Click this button to save your changes.
Send Loopback Click this button to have the selected MEP send the LBM (Loop Back Message) to a specified
remote end point.
Send Linktrace Click this button to have the selected MEP send the LTMs (Link Trace Messages) to a specified
remote end point.
Table 25 Maintenance > Diagnostic > 802.1ag (continued)
LABEL DESCRIPTION
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