Oam Remote Fault Detection Feature; Link Fault; Dying Gasp; Critical Event - Juniper JUNOSE SOFTWARE 11.2.X - LINK LAYER CONFIGURATION GUIDE 7-7-2010 Configuration Manual

JunosE 11.2.x Link Layer Configuration Guide

OAM Remote Fault Detection Feature

Link Fault

Dying Gasp

Critical Event

234
Guidelines for Configuring 802.3ah OAM Link-Fault Management on page 237
OAM Messages on page 226
Monitoring OAM Link-Fault Management Configuration for an Interface on page 250
Monitoring OAM Link-Fault Management Statistics for an Interface on page 248
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
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 226):
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.
This event type denotes that an unrecoverable condition, such as a power failure, has
taken place. This type of condition is vendor specific. A notification about the condition
might be sent immediately and continuously. If you configure this option, the local OAM
entity detects unrecoverable error 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 Dying Gasp bit set in the Flags field that it receives from the remote peer.
This event type indicates that an unspecified vendor-specific critical event has occurred.
A critical event might be sent immediately and continuously. If you configure this option,
the local OAM entity detects critical event error 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 Critical Event bit set in the Flags field that it receives from the remote
peer.
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