H3C S5120-EI Series, Operation Manual

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1-12
Configuring DLDP Authentication
You can guard your network against attacks and vicious probes by configuring an appropriate DLDP
authentication mode, which can be clear text authentication or MD5 authentication. If your network is
safe, you can choose not to authenticate.
Follow these steps to configure DLDP authentication:
To do… Use the command… Remarks
Enter system view
system-view
—
Configure DLDP
authentication
dldp authentication-mode
{
md5 md5-password
|
none
|
simple simple-password
}
Required
none
by default
To enable DLDP to operate properly, make sure the DLDP authentication modes and the passwords of
the both sides of a link are the same.
Resetting DLDP State
After DLDP detects a unidirectional link on a port, the port enters Disable state. In this case, DLDP
prompts you to shut down the port manually or shuts down the port automatically depending on the
user-defined port shutdown mode. To enable the port to perform DLDP detect again, you can reset the
DLDP state of the port in one of the following methods:
z
If the port is shut down with the
shutdown
command manually, run the
undo shutdown
command
on the port.
z
If the port is shut down by DLDP automatically, run the
dldp reset
command on the port.
Alternatively, you can leave the work to DLDP, which can enable the port automatically upon
detecting that the link has been restored to bidirectional. For how to reset DLDP state with the
dldp
reset
command, refer to Resetting DLDP State in System View and Resetting DLDP State in Port
view/Port Group View .
The DLDP state that the port transits to upon the DLDP state reset operation depends on its physical
state. If the port is physically down, it transits to Inactive state; if the port is physically up, it transits to
Active state.
Resetting DLDP State in System View
Resetting DLDP state in system view applies to all the ports shut down by DLDP.
Follow these steps to reset DLDP in system view:
To do… Use the command… Remarks
Enter system view
system-view
—
Reset DLDP state
dldp reset
Required