Juniper JUNOSE 11.2, Руководство по настройке

Страница: 266 / 772

•
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
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 226):
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.
Dying Gasp
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.
Critical Event
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.
Copyright © 2010, Juniper Networks, Inc. 234
JunosE 11.2.x Link Layer Configuration Guide