Chapter 4. Web Configuration & Operation
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CHAPTER 4
WEB OPERATION & CONFIGURATION
4.3.6 Link OAM
The Ethernet Operation, Administration, and Maintenance (OAM; IEEE 802.3ah) protocol for monitoring, and
troubleshooting Metro Ethernet networks and Ethernet WANs relies on an optional sub-layer in the data link layer of
the Normal link operation. Ethernet OAM can be implemented on any full-duplex point-to-point or emulated point-to-
point Ethernet link for a network or part of a network.
IEEE 802.3ah provides the following features:
Auto-discovery:
IEEE 802.3ah provides a mechanism to detect the presence of an 802.3ah-capable Network
Device (ND) on the other end of the Ethernet link. To this end, the 802.3ah-capable ND sends specified OAMPDUs
in a periodic fashion, normally once a second. During the OAM Discovery process, the 802.3ah-capable ND
monitors received OAMPDUs from the remote ND and allows 802.3ah OAM functionality to be enabled on the
link based upon local and remote state and configuration settings. In other words, it supports OAM capability
discovery function and hence eliminates the need for operators' configurations.
Remote loopback:
IEEE 802.3ah provides a mechanism to support a data link layer frame-level loopback mode.
With this function, the operator may test the performance of the link prior to placing a link in service. Once the
Ethernet physical link is verified to be operational and error-free, the operator takes the link out of remote
loopback and places it in service.
4.3.6.1 Port Settings
Port:
The port number. Click on the port to view its OAM status details.
OAM Enabled:
Select the checkbox to enable OAM function on a port. Clear the checkbox to disable OAM.
OAM Mode:
Select the OAM mode on a per port basis. The default mode is “Passive”.
Active:
The device set in Active mode initiates the exchange of Information OAMPDUs
Passive:
The device in Passive mode does not initiate the Discovery process but reacts to the initiation of the
Discovery process by the remote 802.3ah-enabled device.
Summary of Contents for MSW-4424C Series
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