HP A5830 series Configuration Manual page 14

Table 7 Ethernet OAM link error events
Ethernet OAM link events
Errored symbol event
Errored frame event
Errored frame period event
Errored frame seconds event
The system transforms the period of detecting errored frame period events into the maximum number of
64-byte frames (excluding the interframe spacing and preamble) 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 because of 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
Link Fault
Dying Gasp
Critical Event
This Switch Series is able to receive Information OAMPDUs carrying the critical link events listed in
8.
This Switch Series is unable to support the sending of Information OAMPDUs carrying Link Fault events.
This Switch Series is able to send Information OAMPDUs carrying Dying Gasp events when the device is
rebooted or relevant ports are shut down manually. Physical IRF ports, however, are unable to send this
type of OAMPDU. For more information about physical IRF ports, see IRF Configuration Guide.
This Switch Series is unable to send Information OAMPDUs carrying Critical Events.
Description
An errored symbol event occurs when the number of detected
symbol errors during a specified detection interval exceeds the
predefined threshold.
An errored frame event occurs when the number of detected error
frames during a specified interval exceeds the predefined
threshold.
An errored frame period event occurs if the number of frame errors
in a specific number of received frames exceeds the predefined
threshold.
An errored frame seconds event occurs when the number of error
frame seconds detected on a port during a specified detection
interval reaches the error threshold.
Description
Peer link signal is lost.
A power failure or other unexpected error
occurred.
An undetermined critical event occurred.
OAMPDU transmission frequencies
Once per second
Non-stop
Non-stop
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Table