ZyXEL Communications VMG Series - Ah (OAM)

Chapter 45 Diagnostic
VMG/EMG/AM/DM/GM Series User’s Guide
461
The following table describes the fields in this screen.
45.5 802.3ah (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.
Table 175 Maintenance > Diagnostic > 802.1ag
LABEL DESCRIPTION
802.1ag Connectivity Fault Management
IEEE 802.1ag
CFM
Click this switch to enable or disable the IEEE802.1ag CFM specification, which allows network
administrators to identify and manage connection faults. When the switch goes to the right
, the function is enabled. Otherwise, it is not.
Y.1731 Click this switch to enable or disable Y.1731, which monitors Ethernet performance. When the
switch goes to the right , the function is enabled. Otherwise, it is not.
Interface Select the interface on which you want to enable the IEE 802.1ag CFM.
Maintenance
Domain (MD)
Level
Select a level (0 – 7) under which you want to create an MA.
MD Name Enter a descriptive name for the MD (Maintenance Domain). This field only appears if the Y.1731
field is disabled.
MA ID Enter a descriptive name to identify the Maintenance Association. This field only appears if the
Y.1731 field is disabled.
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 Enter a VLAN ID (1 – 4094) for this MA.
Local MEP ID Enter the local Maintenance Endpoint Identifier (1 – 8191).
CCM Click the switch to the right to continue sending MEP information by CCM (Connectivity
Check Messages).
When CCMs are received the Zyxel Device 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 Zyxel Device 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.