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Enabling DLDP
To properly configure DLDP on the device, first enable DLDP globally, and then enable it on each port.
To enable DLDP:
Ste
Command
Remarks
1. Enter system view.
system-view N/A
2. Enable DLDP globally.
dldp enable Globally disabled by default.
3. Enter Layer 2 Ethernet
interface view or port group
view.
Enter Layer 2 Ethernet
interface view:
interface interface-type
interface-number
Enter port group view:
port-group manual
port-group-name
Use either approach.
Configurations made in Layer 2 Ethernet
interface view apply to the current port only.
Configurations made in port group view
apply to all ports in the port group.
4. Enable DLDP.
dldp enable Disabled on a port by default.
NOTE:
• DLDP takes effect only on Ethernet interfaces (fiber or copper).
• DLDP can detect unidirectional links only after all physical links are connected. Therefore, before
enabling DLDP, make sure that optical fibers or copper twisted pairs are connected.
Setting DLDP mode
DLDP operates in normal or enhanced mode.
In normal mode, DLDP does not actively detect neighbors when the corresponding neighbor entries age
out.
In enhanced mode, DLDP actively detects neighbors when the corresponding neighbor entries age out.
To set DLDP mode:
Ste
Command
Remarks
1. Enter system view.
system-view N/A
2. Set DLDP mode.
dldp work-mode { enhance | normal }
Optional.
Normal by default.
Setting the interval to send advertisement packets
DLDP detects unidirectional links by sending Advertisement packets. To make sure that DLDP can detect
unidirectional links promptly without affecting network performance, set the advertisement interval
appropriately depending on your network environment. The interval should be set shorter than one third
of the STP convergence time. If the interval is too long, STP loops may occur before unidirectional links
are detected and shut down. If the interval is too short, the number of advertisement packets will increase.
H3C recommends that you use the default interval in most cases.
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