H3C Technologies H3C WX6000 Series Access Controllers - Manual (Page 303)

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On a port with both remote OAM loopback and DLDP enabled, if the port shutdown mode is auto
mode, the port will be shut down by DLDP when it receives a packet sent by itself, causing remote
OAM loopback to operate improperly. To prevent this, you need to set the port shutdown mode to
auto mode.
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If the device is busy, or the CPU utilization is high, normal links may be treated as unidirectional
links. In this case, you can set the port shutdown mode to manual mode to eliminate the effects
caused by false unidirectional link report.
Configuring DLDP Authentication
Follow these steps to configure DLDP authentication:
To do… Use the command… Remarks
Enter system view system-view —
Configure DLDP authentication
dldp authentication-mode { md5
md5-password | none | simple
simple-password }
Required
none by default
To enable DLDP to operate properly, make sure the DLDP authentication modes and the passwords of
the both sides of a link are the same.
Resetting DLDP State
After a unidirectional link is detected, DLDP shuts down the corresponding port. To enable the port to
perform DLDP detect again, you can reset DLDP state for it. A port can be in different state after you
reset DLDP state for it. That is, it can be in Inactive state (if the port is physically down) or in Active state
(if the port is physically up) after you reset DLDP state for it.
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The configuration of resetting DLDP state performed in system view applies to all the ports shut
down by DLDP.
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The configuration of resetting DLDP state performed in port view or port group view applies to the
current port or all the ports in the port group shut down by DLDP.
Resetting DLDP State in System view
Follow these steps to reset DLDP in system view: