Alcatel-Lucent 7750 Configuration Manual page 160

802.3ah OAM
If the clear command is used to clear remote events, events conveyed to the local node by the peer,
no notification is generated to the peer to indicate a clear function has been performed. Since the
Event Notification OAMPDU is only sent when the initial event was raised, there is no further
Event Notification and blackholes can result. If the Information OAMPDU Flag fields are used to
ensure a constant refresh of information, the remote error will be reinstated as soon as the next
Information OAMPDU arrives with the appropriate Flag field set.
Local and remote efm-oam port events are stored in the efm-oam event logs. These logs maintain
and display active and cleared signal failure degrade events. These events are interacting with the
efm-oam protocol. This logging is different than the time stamped events for information logging
purposes included with the system log. To view these events, the event-log option has been added
to the show port port-id ethernet efm-oam command. This includes the location, the event type,
the counter information or the decoded Network Event TLV information, and if the port has been
affected by this active event. A maximum of 12 port events will be retained. The first three indexes
are reserved for the three Information Flag fields, dying gasp, critical link, and link fault. The other
nine indexes will maintain the current state for the various error monitors in a most recent behavior
and events can wrap the indexes, dropping the oldest event.
show port 1/2/1 ethernet efm-oam event-logs
===============================================================================
Active Failure Ethernet OAM Event Logs
===============================================================================
Log Index
Event Time Reference
Location
Type
Window
Threshold
Value
Running Total
Event Total
Port Affecting
-------------------------------------------------------------------------------
Number of Logs : 1
===============================================================================
===============================================================================
Active Degraded Ethernet OAM Event Logs
===============================================================================
Number of Logs : 0
===============================================================================
===============================================================================
Cleared Failure Ethernet OAM Event Logs
===============================================================================
Log Index
Event Time Reference
Location
Type
Event Total
-------------------------------------------------------------------------------
Number of Logs : 1
===============================================================================
Page 160
: 4
: 0d 07:01:45
: remote
: Errored Frame
: 50
: 100
: 100
: 100
: 1
: yes
: 2
: 0d 06:59:08
: remote
: Dying Gasp
: 16
7750 SR Interface Configuration Guide