1.1.1 display
dldp
Syntax
display dldp
[ interface-type interface-number ]
View
Any view
Parameter
interface-type: Port type.
interface-number: Port number.
Description
Use the display dldp command to
display the configuration information, status information and neighbor tables
of the DLDP-enabled port.
l
The configuration information of the
DLDP-enabled port includes interval, authentication mode, password, DLDP
operating mode, and DLDP handling mode after a unidirectional link is detected.
l
The status information includes neighbor status,
local port status and link status.
l
The neighbor table includes the MAC address
item, the port ID item, the neighbor status item and the aging time item.
Example
# Display the information about all the
DLDP-enabled ports.
<H3C> display dldp
dldp interval 10
dldp work-mode enhance
dldp authentication-mode none
dldp unidirectional-shutdown
manual
The port number with DLDP is 2.
interface GigabitEthernet2/0/1
dldp port state : inactive
dldp link state : down
The neighbor number of the port
is 0.
interface GigabitEthernet2/0/2
dldp port state : advertisement
dldp link state : up
The neighbor number of the port
is 1.
neighbor mac address :
000f-e20f-750d
neighbor port index : 98
neighbor state : two way
neighbor aged time : 24
Syntax
dldp { enable
| disable }
View
System view, Ethernet port view
Parameter
None
Description
In system view:
Use the dldp enable command to
enable DLDP globally on all optical ports of the switch.
Use the dldp disable command to
disable DLDP globally on all optical ports of the switch.
In Ethernet port view:
Use the dldp enable command to
enable DLDP on the current port.
Use the dldp disable command to
disable DLDP on the current port.
The commands apply to both non-optical
ports and optical ports.
By default, DLDP is disabled.
When you use the dldp enable/dldp disable commands in system
view to enable/disable DLDP globally on all optical ports of the switch, these
commands are only valid for the existing optical ports on the device, however,
they are invalid for those optical ports added subsequently.
Example
# Enable DLDP globally on all optical ports
of the switch.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] dldp enable
DLDP is enabled on all fiber ports.
Syntax
dldp authentication-mode { none | simple simple-password | md5 md5-password
}
undo dldp authentication-mode
View
System view
Parameter
none:
Performs no authentication with the peer port.
simple: Sets
the authentication mode with the peer port to plain text.
simple-password: Password for authentication with the peer port, a plaintext string
of 1 character to 16 characters.
md5: Sets
the authentication mode with the peer port to MD5.
md5-password:
Password for MD5 authentication with the peer port. This argument can be a
plaintext string of 1 character to 16 characters or a 24-bit ciphertext string.
Description
Use the dldp authentication-mode command
to set the DLDP authentication mode and the corresponding password for the
local ports and the ports of neighboring devices.
Use the undo dldp authentication-mode
to cancel the DLDP authentication mode and the corresponding password for the
local ports of the ports of neighboring devices.
By default, the authentication mode is none,
that is, authentication is not performed.
Note that:
When configuring the DLDP authentication
mode and the corresponding authentication password, make sure the same DLDP
authentication mode and the corresponding password are set for the ports
connecting the local device and the peer device. Otherwise, DLDP authentication
fails. DLDP cannot work if DLDP authentication fails.
Example
# Enable DLDP on the ports connecting two
devices. Plaintext authentication is performed with the password password1.
l
Configure H3C A:
<H3CA> system-view
System View: return to User View with
Ctrl+Z.
[H3CA] dldp authentication-mode
simple password1
l
Configure H3C B:
<H3CB> system-view
System View: return to User View with
Ctrl+Z.
[H3CB] dldp authentication-mode
simple password1
Syntax
dldp interval integer
undo dldp interval
View
System view
Parameter
integer:
Interval of sending DLDP packets, in the range of 5 seconds to 100 seconds.
This argument is 10 seconds by default.
Description
Use the dldp interval command to set
the interval of sending advertisement packets for all the DLDP-enabled ports in
the Advertisement status.
Use the undo dldp interval command
to restore the interval to the default value.
By default, the interval of sending
advertisement packets is 10 seconds.
Note that:
l
The interval set through this command is
applicable to all DLDP-enabled ports.
l
The interval must be shorter than one-third of
the STP convergence time. If too long an interval is set, an STP loop may occur
before DLDP shuts down unidirectional links. On the contrary, if too short an
interval is set, network traffic increases, and port bandwidth is reduced.
Normally, the STP convergence time is 30 seconds.
Example
# Set the interval of sending advertisement
packets to 20 seconds for all the DLDP-enabled ports.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] dldp interval 20
Syntax
dldp reset
View
System view, Ethernet port view
Parameter
None
Description
In system view:
Use the dldp reset command to reset
the DLDP status of all the ports disabled by DLDP.
In Ethernet port view:
Use the dldp reset command to reset
the DLDP status of the current port disabled by DLDP.
After the dldp reset command is
executed, the DLDP status of a port changes from disable to active and DLDP
restarts to probe the link status of the fiber cables or copper twisted pairs.
Related command: dldp, and dldp
unidirectional-shutdown.
Example
# Reset the DLDP status of all the ports disabled
by DLDP.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] dldp reset
Syntax
dldp unidirectional-shutdown { auto | manual }
undo dldp
unidirectional-shutdown
View
System view
Parameter
auto:
Disables the corresponding port automatically when DLDP detects a
unidirectional link.
manual:
Prompts the user to disable the corresponding port manually instead of
disabling the port automatically when DLDP detects an unidirectional link. DLDP
packet sending/receiving stops on the port when DLDP prompts the user to
disable the port.
Description
Use the dldp unidirectional-shutdown command
to set the handling mode when DLDP detects a unidirectional link.
Use the dldp unidirectional-shutdown command
to restore the default setting.
By default, the handling mode after DLDP
detects a unidirectional link is auto.
Related command: dldp work-mode.
Example
# Configure DLDP to automatically disable
the corresponding port when DLDP detects a unidirectional link.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] dldp unidirectional-shutdown
auto
Syntax
dldp work-mode { enhance | normal }
undo dldp
work-mode
View
System view
Parameter
enhance:
Configures DLDP to work in enhanced mode. In this mode, DLDP probes actively
whether neighbors exist when DLDP ages the neighbor tables.
normal:
Configures DLDP to work in normal mode. In this mode, DLDP does not probe
actively whether neighbors exist when DLDP ages the neighbor tables.
Description
Use the dldp work-mode command to
set the DLDP operating mode.
Use the undo dldp work-mode command
to restore the default DLDP operating mode.
By default, DLDP works in normal mode.
Example
# Configure DLDP to work in enhanced mode.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] dldp work-mode enhance
