3Com Switch 4800G 24-Port Configuration Manual page 192

192 C 22: DLDP C
HAPTER
Setting the Port
Shutdown Mode
c
Configuring DLDP
Authentication
c
ONFIGURATION
To do...
Enter system view
Set the DelayDown timer dldp delaydown-timer time
On detecting a unidirectional link, the ports can be shut down in one of the
following two modes.
Manual mode. This mode applies to networks with low performance, where
■
normal links may be treated as unidirectional links. It protects service packet
transmission against false unidirectional links. In this mode, DLDP only detects
unidirectional links and generates log and traps. The operations to shut down
unidirectional link ports are accomplished by the administrator.
Auto mode. In this mode, when a unidirectional link is detected, DLDP transits
■
to Disable state, generates log and traps, and set the port as DLDP Down.
Follow these steps to set port shutdown mode
To do...
Enter system view
Set port shutdown mode dldp unidirectional-shutdown
CAUTION:
On a port with both remote OAM loopback and DLDP enabled, if the port
■
shutdown mode is auto mode, the port will be shut down by DLDP when it
receives a packet sent by itself, causing remote OAM loopback to operate
improperly. To prevent this, you need to set the port shutdown mode to auto
mode.
If the device is busy, or the CPU utilization is high, normal links may be treated
■
as unidirectional links. In this case, you can set the port shutdown mode to
manual mode to eliminate the effects caused by false unidirectional link report.
Follow these steps to configure DLDP authentication:
To do...
Enter system view
Configure DLDP authentication dldp authentication-mode { md5
CAUTION: 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.
Use the command...
system-view
Use the command...
system-view
{ auto | manual }
Use the command...
system-view
md5-password | none | simple
simple-password }
Remarks
-
Optional
1 second by default
DelayDown timer setting
applies to all the DLDP-enabled
ports.
Remarks
-
Optional
auto by default
Remarks
-
Required
none by default