Juniper JUNOSE 11.1.X - LINK LAYER CONFIGURATION 4-7-2010, Руководство по настройке

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host1(config-if)# ethernet oam lfm link-monitor symbol-period threshold low
10
In this case, a low symbol errors threshold of 10 symbols is set. When this
threshold is exceeded, the action configured on the interface using the
ethernet oam lfm high-threshold action command is taken.
i. Specify a period of time in which symbol error events are counted for both
high and low threshold settings. The time period is specified in seconds.
host1(config-if)# ethernet oam lfm link-monitor symbol-period window 10
In this case, symbol error events are counted over a period of 10 seconds.
The configured window is valid for both high and low threshold settings.
The high and low threshold settings are reset whenever a new window,
during which errors are counted, commences.
NOTE: We recommend that you do not use a multiple of the number of symbols
because the window size varies greatly, depending on the speed of the link. For
example, a 10 Gigabit Ethernet link generates 10.3x10M symbols per second. If the
window has a lower bound of 1M symbols, sampling the symbol error statistic occurs
every 97 microseconds.
Some of the interfaces do not support statistics for errored symbol events. If you
configure a monitor for symbol errors on such interfaces, the setting does not have
any effect.
6.
Configure a specific action to occur when a high threshold for an error is exceeded
on an Ethernet OAM interface. You can configure the OAM application to influence
the operational state of the link, when a link quality threshold is exceeded or a
critical event PDU is received from the peer, or both. If you configured the action
for an OAM event to disable an Ethernet OAM interface when a high threshold
for an error is exceeded, the link moves to the operational down status.
host1(config-if)# ethernet oam lfm high-threshold action failover
In this case, when the high threshold is exceeded for a local link error, a failover
occurs to the secondary link of the redundant port on GE-2 and GE-HDE line
modules that are paired with GE-2 SFP I/O modules.
7.
Configure the Ethernet OAM link-fault management functionality to detect failure
conditions that occurred at a remote peer and influence the state of the link
based on an Event Notification PDU received from the remote peer. You can
also set the action to be performed when a failure condition is observed in the
link. If you enable detection of faults that occurred at the remote peer, the local
OAM entity monitors unspecified critical event, unrecoverable error, and
loss-of-signal conditions that the remote peer notifies it using an Information
OAM PDU with the Critical Event, Dying Gasp, and Link Fault bits set in the Flags
field.
host1(config-if)# ethernet oam lfm remote-failure critical-event action
disable-interface
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Configuring 802.3ah OAM Link-Fault Management
JUNOSe 11.1.x Link Layer Configuration Guide