Oam Remote Fault Detection Feature; Link Fault - Juniper JUNOSE 11.1.X - LINK LAYER CONFIGURATION 4-7-2010 Configuration Manual

JUNOSe 11.1.x Link Layer Configuration Guide
By default, no action is performed on the link. The operational status displayed in
the output of the show commands for interfaces is down if the OAM session is marked
as down/nonfunctional after the configured action is taken on the link.
Related Topics

OAM Remote Fault Detection Feature

Failures in Ethernet connectivity that are caused by slowly degrading quality are
difficult to notice. JUNOSe Software enables you to configure the OAM application
to monitor the receive path of the link for quality and generate Event Notification
PDUs to the remote peer. The following failure conditions can be communicated by
the remote entity to its peer using the Flags field of an Information OAM PDU (Figure
30 on page 230):

Link Fault

This event type signifies that a loss of signal is detected by the receiver; for example,
the peer's laser is not operating correctly. A link fault is sent once per second in the
Information OAM PDU. Link fault is applicable only when the physical sublayer is
capable of independent transmit and receive operations. If you configure this option,
the local OAM entity detects loss-of-signal conditions that occurred in the receive
path of the link. The local entity influences the state of the link based on an
Information OAM PDU with the Link Fault bit set in the Flags field that it receives
from the remote peer.
238
OAM Remote Fault Detection Feature
Failover On GE-2 and GE-HDE line modules that are paired with GE-2 SFP I/O
modules with physical link redundancy, this action attempts to transition the
link from active to redundant.
OAM Feature Overview on page 234
Guidelines for Configuring 802.3ah OAM Link-Fault Management on page 242
OAM Messages on page 230
Monitoring OAM Link-Fault Management Configuration for an Interface on
page 255
Monitoring OAM Link-Fault Management Statistics for an Interface on page 253
ethernet oam lfm high-threshold
ethernet oam lfm link-monitor frame-seconds
ethernet oam lfm link-monitor frame-seconds-summary
ethernet oam lfm link-monitor symbol-period
show ethernet oam lfm status
show ethernet oam lfm statistics