190 CHAPTER 22: DLDP CONFIGURATION
DLDP Configuration
Task List
Complete the following tasks to configure DLDP:
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■ DLDP works only when the link is up.
■ To ensure unidirectional links can be detected, make sure these settings are the
same on the both sides: DLDP state (enabled/disabled), the interval for sending
Advertisement packets, authentication mode, and password.
■ Keep the interval for sending Advertisement packets adequate to enable
unidirectional links to be detected in time. If the interval is too long,
unidirectional links cannot be terminated in time; if the interval is too short,
network traffic may increase in vain.
■ LACP (Link Aggregation Control Protocol) events have no effect on DLDP. Links
in an aggregation group are treated individually in DLDP.
■ 802.1X has no effect on DLDP.
■ When connecting two DLDP-enabled devices, make sure the DLDP version ID
fields of the DLDP packets exchanged between the two devices are the same.
Otherwise, DLDP may operate improperly.
Enabling DLDP Follow these steps to enable DLDP:
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 device transits to this state, the corresponding
neighbor entries maintained on other devices are removed.
Table 36 Description on DLDP neighbor states
DLDP neighbor
state Description
Task Remarks
“Enabling DLDP” on page 190 Required
“Setting DLDP Mode” on page 191 Optional
“Setting the Interval for Sending Advertisement Packets” on page 191 Optional
“Setting the DelayDown Timer” on page 191 Optional
“Setting the Port Shutdown Mode” on page 192 Optional
“Configuring DLDP Authentication” on page 192 Optional
“Resetting DLDP State” on page 193 Optional
To do… Use the command… Remarks
Enter system view system-view -
Enable DLDP globally dldp enable Required
Globally disabled by default
Enter
Ethernet
port view
or port
group
view
Enter
Ethernet
port view
interface interface-type
interface-number
Either of the two is required.
The configuration performed in
Ethernet port view applies to the
current port only. The configuration
performed in port group view applies
to all the ports in the port group.
Enter port
group
view
port-group { aggregation
agg-id | manual
port-group-name }
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