Juniper JUNOSE SOFTWARE 11.2.X - LINK LAYER CONFIGURATION GUIDE 7-7-2010 Configuration Manual page 287

Copyright © 2010, Juniper Networks, Inc.
Table 14: show ethernet oam lfm summary Output Fields (continued)
Field Name
Discovery State
Chapter 7: Configuring IEEE 802.3ah OAM Link-Fault Management
Field Description
State of the discovery mechanism:
Fault—When the discovery process enters the Fault state, the
local PDU value is set based on the value of local link status
field. While the local link status is set to Fail, the local OAM
entity remains in this state indicating to the remote peer there
is link fault. This condition is accomplished by sending
Information OAM PDUs once per second with the Link Fault bit
of the Flags field set and no Information TLVs in the Data field
Active send local—A local entity configured in Active mode
sends Information OAM PDUs that only contain the Local
Information TLV. This state is referred to as Active Send Local.
While in this state, the local entity waits for Information OAM
PDUs received from the remote entity
Passive wait—An entity configured in passive mode waits until
receiving Information OAM PDUs with Local Information TLVs
before sending any Information OAM PDUs with Local
Information TLVs. This state is called Passive Wait. By waiting
until first receiving an Information OAM PDU with the Local
Information TLV, a passive entity cannot complete the OAM
Discovery process when connected to another entity in passive
mode
Send any—After an OAM PDU has been received indicating the
remote device is satisfied with the respective settings, the local
device enters the SEND_ANY state. This is the expected normal
operating state for OAM on fully operational links
Send local remote—After the local entity has received an
Information OAM PDU with the Local Information TLV from
the remote entity, the local entity begins sending Information
OAM PDUs that contain both the Local and Remote Information
TLVs. This state is called Send Local Remote. If at any time the
settings on either the local or remote entity change resulting
in the local OAM client becoming unsatisfied with the settings,
the discovery process returns to the Send Local Remote state
Send local remote ok—If the local OAM client deems the
settings on both the local and remote entities are appropriate,
it enters the Send Local Remote Ok state. If at any time the
settings on the local OAM client change resulting in the remote
OAM client becoming unsatisfied with the settings, the OAM
discovery process returns to the Send Local Remote Ok state
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