Raisecom
ISCOM2600G-HI (A) Series Configuration Guide
Raisecom Proprietary and Confidential
Copyright © Raisecom Technology Co., Ltd.
OAM loopback occurs only after the Ethernet OAM connection is established. When
connected, the active OAM entity initiates the OAM loopback command, and the peer OAM
entity responds to the command. When the peer OAM entity is in loopback mode, all packets
except OAM PDU will be retraced.
Switch A, in active mode, determines link status through returned packets, as shown in Figure
9-1.
Figure 9-1 OAM loopback
9.2 EFM
9.2.1 Introduction
Complying with IEEE 802.3ah protocol, Ethernet in the First Mile (EFM) is a link-level
Ethernet OAM technology. It provides link connectivity detection, link fault monitoring, and
remote fault notification for a link between two directly connected devices. EFM is mainly
used for Ethernet links on edges of the network accessed by users.
9.2.2 Preparing for configurations
Scenario
Deploying EFM feature between directly connected devices can efficiently improve Ethernet
link management and maintenance capability and ensure stable network operation.
Prerequisite
Connect interfaces.
Configure physical parameters to make interfaces Up at the physical layer.
9.2.3 Default configurations of EFM
Default configurations of EFM are as below.
Interval for sending messages
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