Table of Contents

Chapter 1 DLDP Configuration Commands. 1-1

1.1 DLDP Configuration Commands. 1-1

1.1.1 display dldp. 1-1

1.1.2 display dldp statistics. 1-3

1.1.3 dldp authentication-mode. 1-4

1.1.4 dldp delaydown-timer 1-5

1.1.5 dldp enable. 1-6

1.1.6 dldp interval 1-7

1.1.7 dldp reset 1-8

1.1.8 dldp unidirectional-shutdown. 1-9

1.1.9 dldp work-mode. 1-9

1.1.10 reset dldp statistics. 1-10

 

Chapter 1  DLDP Configuration Commands

1.1  DLDP Configuration Commands

1.1.1  display dldp

Syntax

display dldp [ interface-type interface-number ]

View

Any view

Parameters

interface-type interface-number: Port type and port number.

Description

Use the display dldp command to display the DLDP configuration of a port.

If you do not provide the interface-type or interface-number arguments, this command displays the DLDP configuration of all the DLDP-enabled ports.

Examples

# Display the DLDP configuration of all the DLDP-enabled ports.

<Sysname> display dldp

 DLDP global status : enable

 DLDP interval : 5s

 DLDP work-mode : enhance

 DLDP authentication-mode : simple, password is 123

 DLDP unidirectional-shutdown : auto

 DLDP delaydown-timer : 2s

 The number of enabled ports is 2.

 

Interface GigabitEthernet1/1/1

 DLDP port state : advertisement

 DLDP link state : up

 The neighbor number of the port is 1.

    Neighbor mac address : 0000-0000-0100

    Neighbor port index : 21

    Neighbor state : two way

    Neighbor aged time : 13

Interface GigabitEthernet1/1/2

 DLDP port state : advertisement

 DLDP link state : up

 The neighbor number of the port is 1.

    Neighbor mac address : 0000-0000-1100

    Neighbor port index : 22

    Neighbor state : two way

    Neighbor aged time : 12

# Display the DLDP configuration of GigabitEthernet1/1/1.

<Sysname> display dldp GigabitEthernet1/1/1

Interface GigabitEthernet1/1/1

 DLDP port state : advertisement

 DLDP link state : up

 The neighbor number of the port is 1.

    Neighbor mac address : 0000-0000-0100

    Neighbor port index : 23

    Neighbor state : two way

    Neighbor aged time : 13

Table 1-1 Description on the fields of the display dldp command

Field	Description
DLDP global status	Global DLDP state (enable or disable)
DLDP interval	Interval for sending Advertisement packets (in seconds)
DLDP work-mode	DLDP mode (enhance or normal)
DLDP authentication-mode	DLDP authentication mode (none, simple, or md5)
password	Password for DLDP authentication
DLDP unidirectional-shutdown	Port shutdown mode (auto or manual)
DLDP delaydown-timer	Setting of the DelayDown timer
The number of enabled ports	Number of the DLDP-enabled ports
Interface	Index of a DLDP-enabled port
DLDP port state	DLDP state on a port (initial, inactive, active, advertisement, probe, disable, or delaydown)
DLDP link state	Port state (up or down)
The neighbor number of the port	Number of the neighbors of a port
Neighbor mac address	MAC address of a neighbor
Neighbor port index	Neighbor port index
Neighbor state	Neighbor state (unknown, one way, or two way)
Neighbor aged time	Neighbor aging time

 

1.1.2  display dldp statistics

Syntax

display dldp statistics [ interface-type interface-number ]

View

Any view

Parameters

interface-type interface-number: Port type and port number.

Description

Use the display dldp statistics command to display the statistics on the DLDP packets passing through a port.

If you do not provide the interface-type or interface-number argument, this command displays the statistics on the DLDP packets passing through all the DLDP-enabled ports.

Examples

# Display the statistics on the DLDP packets passing through all the DLDP-enabled ports.

<Sysname> display dldp statistics

Interface GigabitEthernet1/1/1

 Packets sent : 6

 Packets received : 5

 Invalid packets received : 2

 Loop packets received : 0

 Authentication failed packets received : 0

 Valid packets received : 3

 

Interface GigabitEthernet1/1/2

 Packets sent : 7

 Packets received : 7

 Invalid packets received : 3

 Loop packets received : 0

 Authentication failed packets received : 0

 Valid packets received : 4

# Display the statistics on the DLDP packets passing through GigabitEthernet1/1/1.

<Sysname> display dldp statistics GigabitEthernet1/1/1

Interface GigabitEthernet1/1/1

 Packets sent : 6

 Packets received : 5

 Invalid packets received : 2

 Loop packets received : 0

 Authentication failed packets received : 0

 Valid packets received : 3

Table 1-2 Description on the fields of the display dldp statistics command

Field	Description
Interface	Port index
Packets sent	Total number of DLDP packets sent
Packets received	Total number of DLDP packets received
Invalid packets received	Number of the invalid packets received
Loop packets received	Number of the loopback packets received
Authentication failed packets received	Number of the received packets that failed to pass the authentication
Valid packets received	Number of the valid packets received

 

1.1.3  dldp authentication-mode

Syntax

dldp authentication-mode { md5 md5-password | none | simple simple-password }

undo dldp authentication-mode

View

System view

Parameters

md5 md5-password: Specifies to perform MD5 authentication and sets the password. The md5-password argument is the password, a string of 1 to 16 characters or a 24-bit string. The former indicates a plain text password and the latter indicates a cipher text password. Note that this argument is case-sensitive.

None: Specifies not to perform authentication.

simple simple-password: Specifies to perform plain text authentication and sets the password. The simple-password argument is the password, a case-sensitive string of 1 to 16 characters.

Description

Use the dldp authentication-mode command to configure DLDP authentication.

Use the undo dldp authentication-mode command to restore the default.

By default, DLDP authentication is not performed.

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.

Examples

# Configure to perform plain text authentication, setting the password as abc (assuming that Device A and Device B are connected by the DLDP link).

l           Configuration on Device A

<DeviceA> system-view

[DeviceA] dldp authentication-mode simple abc

l           Configuration on Device B

<DeviceB> system-view

[DeviceB] dldp authentication-mode simple abc

1.1.4  dldp delaydown-timer

Syntax

dldp delaydown-timer time

undo dldp delaydown-timer

View

System view

Parameters

Time: Setting of the DelayDown timer, in the range 1 to 5 (in seconds).

Description

Use the dldp delaydown-timer command to set the DelayDown timer.

Use the undo dldp delaydown-timer command to restore the default.

By default, the setting of the DelayDown timer is 1 second.

Note that these two commands apply to all the DLDP-enabled ports.

Examples

# Set the DelayDown timer to 2 seconds.

<Sysname> system-view

[Sysname] dldp delaydown-timer 2

1.1.5  dldp enable

Syntax

dldp enable

undo dldp enable

View

System view, Ethernet port view, port group view

Parameters

None

Description

Use the dldp enable command to enable DLDP.

Use the undo dldp enable command to disable DLDP.

When executed in system view, these two commands enables/disables DLDP globally; when executed in Ethernet port view, these two commands enables/disables DLDP on the current port; when executed in port group view, these two commands enables/disables DLDP on all the ports in the port group.

By default, DLDP is disabled globally or on a port.

 

 

Examples

# Enable DLDP globally.

<Sysname> system-view

[Sysname] dldp enable

# Enable DLDP on GigabitEthernet1/1/1.

<Sysname> system-view

[Sysname] interface GigabitEthernet 1/1/1

[Sysname- GigabitEthernet1/1/1] dldp enable

# Enable DLDP for all the ports in port group 1.

<Sysname> system-view

[Sysname] link-aggregation group 1 mode manual

[Sysname] interface GigabitEthernet1/1/2

[Sysname- GigabitEthernet1/1/2] port link-aggregation group 1

[Sysname- GigabitEthernet1/1/2] quit

[Sysname] interface GigabitEthernet1/1/3

[Sysname- GigabitEthernet1/1/3] port link-aggregation group 1

[Sysname- GigabitEthernet1/1/3] quit

[Sysname] port-group aggregation 1

[Sysname-port-group-aggregation-1] dldp enable

1.1.6  dldp interval

Syntax

dldp interval time

undo dldp interval

View

System view

Parameters

time: Interval for sending Advertisement packets, in the range 1 to 100 (in seconds).

Description

Use the dldp interval command to set the interval for sending Advertisement packets.

Use the undo dldp interval command to restore the default.

By default, the interval for sending Advertisement packets is 5 seconds.

Note that:

l           These two commands apply to all the DLDP-enabled ports.

l           Set the interval for sending Advertisement packets to a value not longer than one-third of the STP convergence time. If the interval is too long, STP loops may occur before unidirectional links are torn down; if the interval is too short, network traffic may increase in vain due to excessive Advertisement packets.

Examples

# Set the interval for sending Advertisement packets to 20 seconds.

<Sysname> system-view

[Sysname] dldp interval 20

1.1.7  dldp reset

Syntax

dldp reset

View

System view, Ethernet port view, port group view

Parameters

None

Description

Use the dldp reset command to reset DLDP state for ports shut down by DLDP to enable them to perform unidirectional link detect.

When executed in system view, this command applies to all the ports shut down by DLDP; when executed in Ethernet port view, this command applies to the current port; when executed in port group view, this command applies to all the ports in the port group shut down by DLDP.

Related commands: dldp enable, dldp unidirectional-shutdown.

Examples

# Reset DLDP state for all the ports shut down by DLDP.

<Sysname> system-view

[Sysname] dldp reset

# Reset DLDP state for GigabitEthernet 1/1/1 (assuming that GigabitEthernet 1/1/1 is shut down by DLDP).

<Sysname> system-view

[Sysname] interface GigabitEthernet 1/1/1

[Sysname-GigabitEthernet1/1/1] dldp reset

# Reset DLDP state for all the ports in port group 1 shut down by DLDP.

<Sysname> system-view

[Sysname] link-aggregation group 1 mode manual

[Sysname] interface GigabitEthernet 1/1/2

[Sysname-GigabitEthernet1/1/2] port link-aggregation group 1

[Sysname-GigabitEthernet1/1/2] quit

[Sysname] interface GigabitEthernet 1/1/3

[Sysname-GigabitEthernet1/1/3] port link-aggregation group 1

[Sysname-GigabitEthernet1/1/3] quit

[Sysname] port-group aggregation 1

[Sysname-port-group-aggregation-1] dldp reset

1.1.8  dldp unidirectional-shutdown

Syntax

dldp unidirectional-shutdown { auto | manual }

undo dldp unidirectional-shutdown

View

System view

Parameters

auto: Sets the port shutdown mode as auto mode, where, when a unidirectional link is detected, the ports involved are shut down by DLDP.

manual: Sets the port shutdown mode as manual mode, where, when a unidirectional link is detected, DLDP prompts you to shut down the involved ports instead of doing so automatically.

Description

Use the dldp unidirectional-shutdown command to set the port shutdown mode.

Use the undo dldp unidirectional-shutdown command to restore the default.

By default, the port shutdown mode is auto mode.

Related commands: dldp work-mode.

Examples

# Set the port shutdown mode as auto mode.

<Sysname> system-view

[Sysname] dldp unidirectional-shutdown auto

1.1.9  dldp work-mode

Syntax

dldp work-mode { enhance | normal }

undo dldp work-mode

View

System view

Parameters

enhance: Specifies the enhanced DLDP mode. When a device operates in this mode and a neighbor entry it maintains expires, the device detects the neighbor before removing the neighbor entry.

normal: Specifies the normal DLDP mode. When a device operates in this mode and a neighbor entry it maintains expires, the device removes the neighbor entry directly.

Description

Use the dldp work-mode command to set the DLDP mode.

Use the undo dldp work-mode command to restore the default DLDP mode.

By default, a device operates in normal DLDP mode.

Note that:

l           In normal DLDP mode, only fiber cross-connected unidirectional links can be detected.

l           In enhanced DLDP mode, two types of unidirectional links can be detected. One is fiber cross-connected links. The other refers to fiber pairs with one fiber not connected or disconnected.

Examples

# Configure the device to operate in enhanced DLDP mode.

<Sysname> system-view

[Sysname] dldp work-mode enhance

1.1.10  reset dldp statistics

Syntax

reset dldp statistics [ interface-type interface-number ]

View

User view

Parameters

interface-type interface-number: Port type and port number.

Description

Use the reset dldp statistics command to clear the statistics on DLDP packets passing through a port.

If you do not provide the interface-type or interface-number argument, this command clears the statistics on the DLDP packets passing through all the DLDP-enabled ports.

Examples

# Clear the statistics on the DLDP packets passing through all the DLDP-enabled ports.

<Sysname> reset dldp statistics