Enabling Dldp; Setting Dldp Mode - 3Com S7906E Configuration Manual

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.
DLDP does not process any link aggregation control protocol (LACP) events. The links in an
aggregation group are treated individually in DLDP.
When connecting two DLDP-enabled devices, make sure the DLDP software version ID fields of
the DLDP packets exchanged between the two devices are the same. Otherwise, DLDP may
operate improperly.

Enabling DLDP

To properly configure DLDP on the device, you need to first enable DLDP globally, and then enable it on
each port.
Follow these steps to enable DLDP:
To do...
Enter system view
Enable DLDP globally
Enter Ethernet
Enter
port view
Ethernet
port view or
Enter port
port group
group view
view
Enable DLDP
You can enable or disable DLDP on a Layer 2 Ethernet port (an optical port or electrical port).

Setting DLDP Mode

There are two DLDP modes:
Normal mode: In this mode, DLDP does not actively detect neighbors when the corresponding
neighbor entries age out. The system can identify only one type of unidirectional links:
cross-connected fibers.
Enhanced mode: In this mo de, DLDP actively detects neighbors when the corresponding neighbor
entries age out. The system can identify two types of unidirectional links: cross-connected fibers
and disconnected fibers.
Follow these steps to set DLDP mode:
To do...
Enter system view
Use the command...
system-view
dldp enable
interface interface-type
interface-number
port-group manual
port-group-name
dldp enable
Use the command...
system-view
1-9
Remarks
—
Required
Globally disabled by default
Either of the two is required.
Configurations made in Ethernet port
view apply to the current port only;
configurations made in port group view
apply to all ports in the port group.
Required
Disabled on a port by default
Remarks
—