H3C S7500 Series Installation instructions

Command Manual – DLDP

H3C S7500 Series Ethernet Switches Table of Contents

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 dldp..........................................................................................................................1-2

1.1.3 dldp authentication-mode........................................................................................ 1-3

1.1.4 dldp interval.............................................................................................................1-4

1.1.5 dldp reset.................................................................................................................1-5

1.1.6 dldp unidirectional-shutdown...................................................................................1-6

1.1.7 dldp work-mode....................................................................................................... 1-7

1.1.8 dldp delaydown-timer.............................................................................................. 1-7

Command Manual – DLDP

H3C S7500 Series Ethernet Switches Chapter 1 DLDP Configuration Commands

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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: Port type.

interface-number: Port number.

Description

Use the display dldp command to display the DLDP configuration information of the

device or the specified port.

Examples

# Display the DLDP configuration information of the device.

<H3C> display dldp

dldp interval 10

dldp work-mode enhance

dldp authentication-mode none

dldp unidirectional-shutdown manual

dldp delaydown-timer 1

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-e227-750d

Command Manual – DLDP

H3C S7500 Series Ethernet Switches Chapter 1 DLDP Configuration Commands

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neighbor port index : 98

neighbor state : two way

neighbor aged time : 24

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

Field Description

dldp interval Interval for sending DLDP

advertisement packets

dldp work-mode DLDP work mode

dldp authentication-mode DLDP authentication mode

dldp unidirectional-shutdown DLDP action to be performed on

detecting a unidirectional link

dldp delaydown-timer Setting of the DelayDown timer

The port number with DLDP Number of the DLDP-enabled ports on

device

interface GigabitEthernet2/0/1 Port type and port number

dldp port state DLDP state of a port

dldp link state DLDP link state

The neighbor number of the port Number of the neighbor ports

neighbor mac address MAC address of a neighbor port

neighbor port index Neighbor port index

neighbor state Neighbor state (two way or unknown)

neighbor aged time Neighbor aging time

1.1.2 dldp

Syntax

dldp { enable |disable }

View

System view, Ethernet port view

Parameters

None

Description

In system view:

Command Manual – DLDP

H3C S7500 Series Ethernet Switches Chapter 1 DLDP Configuration Commands

1-3

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.

Note:

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 not valid for

those added subsequently.

Examples

# 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.

1.1.3 dldp authentication-mode

Syntax

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

undo dldp authentication-mode

View

System view

Parameters

none: Performs no authentication with the peer port.

simple: Sets the authentication mode with the peer port to plain text.

Command Manual – DLDP

H3C S7500 Series Ethernet Switches Chapter 1 DLDP Configuration Commands

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simple-password: Password for authentication with the peer port, a plaintext string in

the range of 1 character to 16 characters.

md5: Specifies the mode of authentication with the peer port to MD5.

Description

Use the dldp authentication-mode command to set the DLDP authentication mode

and password for the ports of the local and peer devices.

Use the undo dldp authentication-mode to cancel the DLDP authentication mode

and password for the ports of the local and peer devices.

By default, authentication mode is none, that is, authentication is not performed.

Note that:

When you configure the DLDP authentication mode and authentication password,

make sure the same DLDP authentication mode and password are set for the ports

connecting the local and peer devices. Otherwise, DLDP authentication fails. DLDP

cannot work when DLDP authentication fails.

Related commands: dldp unidirectional-shutdown.

Examples

# Enable DLDP on the ports connecting two devices. Plaintext authentication is

performed with the password password1.

zConfigure H3C A:

<H3CA> system-view

System View: return to User View with Ctrl+Z.

[H3CA] dldp authentication-mode simple password1

zConfigure H3C B:

<H3CB> system-view

System View: return to User View with Ctrl+Z.

[H3CB] dldp authentication-mode simple password1

1.1.4 dldp interval

Syntax

dldp interval integer

undo dldp interval

View

System view

Command Manual – DLDP

H3C S7500 Series Ethernet Switches Chapter 1 DLDP Configuration Commands

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Parameters

Integer: Interval of sending DLDPpackets, in the range of 1 seconds to 100 seconds. It

is 5 seconds by default.

Description

Use the dldp interval command to set the interval of sending advertisement packets

when all the DLDP-enabled ports are in the Advertisement status.

Use the undo dldp interval command to restore the interval to the default value 5

seconds.

By default, the interval of sending advertisement packets is 5 seconds.

Note that:

zThe interval you define is applicable to all DLDP-enabled ports.

zThe 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.Generally, the STP convergence time is

30 seconds.

zFor the dldp interval integer command, make sure that the same interval for

transmitting advertisement packets is set on the ports used to connected both

devices; otherwise DLDP will not operate properly.

Examples

# 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

1.1.5 dldp reset

Syntax

dldp reset

View

System view, Ethernet port view

Parameters

None

Command Manual – DLDP

H3C S7500 Series Ethernet Switches Chapter 1 DLDP Configuration Commands

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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 these ports changes

from disable to active and DLDP restarts to probe the link status of the fiber cables or

copper twisted pairs.

Related commands: dldp, dldp unidirectional-shutdown.

Examples

# 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

1.1.6 dldp unidirectional-shutdown

Syntax

dldp unidirectional-shutdown {auto |manual }

undo dldp unidirectional-shutdown

View

System view

Parameters

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. It stops the

DLDP packet sending/receiving on the port at the same time.

Description

Use the dldp unidirectional-shutdown command to set the DLDP handling mode

when a unidirectional link is found.

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

By default, the handling mode of DLDP after unidirectional links are detected is auto.

Command Manual – DLDP

H3C S7500 Series Ethernet Switches Chapter 1 DLDP Configuration Commands

1-7

Related commands: dldp work-mode.

Examples

# Configure DLDP to automatically disable the corresponding port when a

unidirectional link is found.

<H3C> system-view

System View: return to User View with Ctrl+Z.

[H3C] dldp unidirectional-shutdown auto

1.1.7 dldp work-mode

Syntax

dldp work-mode {enhance |normal }

undo dldp work-mode

View

System view

Parameters

enhance: Configures DLDP to work in enhanced mode. In this mode, DLDP probes

actively whether neighbors exist when neighbor tables are aging.

normal: Configures DLDPto work in normal mode. In this mode, DLDP does not probe

actively whether neighbors exist when neighbor tables are aging.

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.

Examples

# Configure DLDP to work in enhanced mode.

<H3C> system-view

System View: return to User View with Ctrl+Z.

[H3C] dldp work-mode enhance

1.1.8 dldp delaydown-timer

Syntax

dldp delaydown-timer delaydown-time

Command Manual – DLDP

H3C S7500 Series Ethernet Switches Chapter 1 DLDP Configuration Commands

1-8

undo dldp delaydown-timer

View

System view

Parameters

delaydown-time: Delaydown timer to be set (in seconds). This argument ranges from 1

to 5. By default, the delaydown timer expires after 1 second it is triggered.

Description

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

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

setting.

Examples

# Set the delaydown timer to 2 seconds.

<H3C> system-view

System View: return to User View with Ctrl+Z.

[H3C] dldp delaydown-timer 2

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