Precautions During Dldp Configuration; Dldp Configuration; Dldp Configuration Tasks - 3Com WX3000 Series Operation Manual

DLDP neighbor state
A DLDP neighbor can be in one of these two states: two way and unknown. You can check the state of
a DLDP neighbor by using the display dldp command.
Table 1-7 Description on the two DLDP neighbor states
DLDP neighbor state
two way
unknown

Precautions During DLDP Configuration

DLDP works only when the link is up.
To insure unidirectional links can be detected, you must make sure: DLDP is enabled on both ends,
and the interval of sending advertisement packets, authentication mode and password are
consistent on both ends.
You can adjust the interval of sending advertisement packets in different network circumstances,
so that DLDP can respond rapidly to link failure. The interval must be shorter than one-third of the
STP convergence time, which is generally 30 seconds. If too long an interval is set, an STP loop
may occur before DLDP shut down unidirectional links. On the contrary, if too short an interval is
set, network traffic increases, and port bandwidth is reduced.
DLDP does not process any LACP event, and treats each link in the aggregation group as
independent.

DLDP Configuration

DLDP Configuration Tasks

Follow these steps to configure DLDP:
Enter system view
Enable
DLDP
Set the authentication mode and
password
Set the interval of sending DLDP packets
The link to the neighbor operates properly.
The device is detecting the neighbor and the neighbor state is
unknown.
To do...
Enable DLDP globally
Enter
Ethernet port
Enable
view
DLDP on
Enable
a port
DLDP on a
port
Description
Use the command...
system-view
dldp enable
Interface interface-type
interface-number
dldp enable
dldp authentication-mode
{ none | simple simple-password
| md5 md5-password }
dldp interval integer
1-6
Remarks
—
Required. By
default, DLDP is
disabled
Optional. By
default, the
authentication
mode is none
Optional. By
default, the
interval is 5
seconds.