H3C Technologies H3C SR8800 - Manual (Page 20)

11
the local OAM entity sends an Event Notification OAMPDU to notify the remote OAM entity. With the
log information, network administrators can track network status promptly.
Table 7 Ethernet OAM link error events
Ethernet OAM link events Description
Errored symbol event
An errored symbol event occurs when the number of
detected symbol errors during a specified detection
interval exceeds the predefined threshold.
Errored frame event
An errored frame event occurs when the number of
detected error frames during a specified interval
exceeds the predefined threshold.
Errored frame period event
An errored frame period event occurs when the
number of frame errors in the specified number of
received frames exceeds the predefined threshold.
Errored frame seconds event
An errored frame seconds event occurs when the
number of error frame seconds detected on a port
during a specified interval reaches the error threshold.
NOTE:
•
The system transforms the period of detecting errored frame period events into the maximum number of
64-byte frames that a port can send in the specified period. The system takes the maximum number of
frames sent as the period. The maximum number of frames sent is calculated using this formula: the
maximum number of frames = interface bandwidth (bps) × errored frame period event detection period
(in ms)/(64 × 8 × 1000)
• A second in which errored frames appear is called an “errored frame second”.
Remote fault detection
Information OAMPDUs are exchanged periodically among Ethernet OAM entities across established
OAM connections. In a network where traffic is interrupted due to device failures or unavailability, the
flag field defined in information OAMPDUs allows an Ethernet OAM entity to send error
information—the critical link event type—to its peer. You can use the log information to track ongoing link
status and troubleshoot problems promptly.
Table 8 Critical link events
Type Description
OAMPDU transmission
frequencies
Link Fault Peer link signal is lost. Once per second
Dying Gasp
An unexpected fault, such as
power failure, occurred.
Non-stop
Critical Event
An undetermined critical event
happened.
Non-stop