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Table 33: OAM Operation State (Continued)
State
Operational
Non Oper Half Duplex
◆
Mode – Sets the OAM operation mode. (Default: Active)
Active – All OAM functions are enabled.
■
Passive – All OAM functions are enabled, except for OAM discovery,
■
sending variable request OAMPDUs, and sending loopback control
OAMPDUs.
Critical Link Event – Controls reporting of critical link events to its
◆
OAM peer.
Dying Gasp – If an unrecoverable condition occurs, the local OAM
■
entity (i.e., this switch) indicates this by immediately sending a trap
message. (Default: Enabled)
Dying gasp events are caused by an unrecoverable failure, such as
a power failure or device reset.
When system power fails, the switch will always send a dying gasp
N
:
OTE
trap message prior to power down.
Critical Event – If a critical event occurs, the local OAM entity
■
indicates this to its peer by setting the appropriate flag in the next
OAMPDU to be sent and stores this information in its OAM event log.
(Default: Enabled)
Critical events include various failures, such as abnormal voltage
fluctuations, out-of-range temperature detected, fan failure, CRC
error in flash memory, insufficient memory, or other hardware
faults.
Errored Frame – Controls reporting of errored frame link events.
◆
An errored frame is a frame in which one or more bits are errored.
An errored frame link event occurs if the threshold is reached or
exceeded within the specified period.
If reporting is enabled and an errored frame link event occurs, the local
OAM entity (this switch) sends an Event Notification OAMPDU to the
remote OAM entity. The Errored Frame Event TLV includes the number
of errored frames detected during the specified period.
Status – Enables reporting of errored frame link events.
■
(Default: Enabled)
– 487 –
| Basic Administration Protocols
C
15
HAPTER
Description
When the local OAM entity learns that both it and the remote
OAM entity have accepted the peering, the state moves to this
state.
This state is returned whenever Ethernet OAM is enabled but
the interface is in half-duplex operation.
OAM Configuration
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Troubleshooting
