9
NOTE:
•
S5800&S5820X Switch Series is able to receive information OAMPDUs carrying the critical link events
listed in
.
•
Only the Gigabit optical ports are able send information OAMPDUs carrying Link Fault events.
•
S5800&S5820X Switch Series is able to send information OAMPDUs carrying Dying Gasp events when
the device is rebooted or relevant ports are manually shut down. Physical IRF ports, however, are unable
to send this type of OAMPDUs. For more information about physical IRF ports, see the
IRF Configuration
Guide.
•
S5800&S5820X Switch Series is unable to send information OAMPDUs carrying Critical Events.
Remote loopback
Remote loopback is available only after the Ethernet OAM connection is established. With remote
loopback enabled, the Ethernet OAM entity operating in active Ethernet OAM mode sends
non-OAMPDUs to its peer. After receiving these frames, the peer does not forward them according to
their destination addresses. Instead, it returns them to the sender along the original path.
Remote loopback enables you to check the link status and locate link failures. Performing remote
loopback periodically helps to detect network faults in time. Furthermore, performing remote loopback
by network segments helps to locate network faults.
Protocols and Standards
IEEE 802.3h,
Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and
Physical Layer Specifications
Ethernet OAM configuration task list
Complete the following tasks to configure Ethernet OAM:
Task Remarks
Configuring basic Ethernet OAM functions
Required
Configuring the Ethernet OAM connection detection timers
Optional
Configuring errored symbol event detection
Optional
Configuring errored frame event detection
Optional
Configuring errored frame period event detection
Optional
Configuring errored frame seconds event detection
Optional
Enabling Ethernet OAM remote loopback
Optional
Configuring OAM
remote loopback
Rejecting the Ethernet OAM remote loopback
request from a remote port
Optional
Configuring basic Ethernet OAM functions
As for Ethernet OAM connection establishment, an Ethernet OAM entity operates in active mode or
passive mode. Only an Ethernet OAM entity in active mode can initiate connection establishment. After