H3C Technologies H3C S12500 Series Switches - Manual (Page 53)

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Only DLDP down ports can send and process Recover packets, including RecoverProbe packets and
RecoverEcho packets. If related ports are manually shut down with the shutdown command, the
auto-recovery mechanism will not take effect.
DLDP neighbor state
A DLDP neighbor can be in one of the three states described in Table 17 .
Table 17 Description of DLDP neighbor states
DLDP neighbor state Description
Unknown
A neighbor is in this state when it is just detected and is being probed. A neighbor is
in this state only when it is being probed. It transitions to Two way state or
Unidirectional state after the probe operation finishes.
Two way
A neighbor is in this state after it receives response from its peer. This state indicates
the link is a two-way link.
Unidirectional
A neighbor is in this state when the link connecting it is detected to be a unidirectional
link. After a switch transitions to this state, the corresponding neighbor entries
maintained on other switches are removed.
DLDP configuration task list
IMPORTANT:
•
For DLDP to work correctly, enable DLDP on both sides and make sure these settings are consistent: the
interval to send Advertisement packets, DLDP authentication mode, and password.
• DLDP does not process any link aggregation control protocol (LACP) events. The links in an aggregation
are treated as individual links in DLDP.
• Make sure the DLDP version running on devices on the two ends are the same.
Task Remarks
Configuring the duplex mode and speed of an Ethernet interface Required
Enabling DLDP Required
Setting DLDP mode Optional
Setting the interval to send advertisement packets Optional
Setting the delaydown timer Optional
Setting the port shutdown mode Optional
Configuring DLDP authentication Optional
Resetting DLDP state Optional