H3C S12500R Series Kurzanleitung

H3C S12500R Switch Router Series

DLDP Configuration Examples

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The information in this document is subject to change without notice.

Contents

Introduction····································································································1

Configuration restrictions and guidelines·······················································1

Prerequisites··································································································1

Example: Configuring the auto port shutdown mode······································1

Network configuration ········································································································································1

Software versions used······································································································································2

Procedures·························································································································································2

Verifying the configuration··································································································································2

Configuration files ··············································································································································6

Example: Configuring the manual port shutdown mode·································6

Example: Configuring the hybrid port shutdown mode·································12

Related documentation················································································17

Introduction

This document provides DLDP configuration examples.

The Device Link Detection Protocol (DLDP) was developed by HP to detect the status of fiber links

or twisted-pair links. When DLDP detects unidirectional links, it can automatically shut down the

faulty port to avoid network problems. Alternatively, a user can manually shut down the faulty port.

Configuration restrictions and guidelines

When you configure DLDP, follow these restrictions and guidelines:

•

For DLDP to operate correctly, configure the full duplex mode for the interfaces at the two

ends of the link, and configure the same speed for the two interfaces.

•

For DLDP to operate correctly, enable DLDP on both sides and make sure the following

settings are consistent:

Interval to send Advertisement packets.

DLDP authentication mode.

Password.

•

By default, interfaces on the device are disabled (in ADM or Administratively Down state).

To have an interface operate, you must use the undo shutdown command to enable that

interface.

Prerequisites

The configuration examples in this document were created and verified in a lab environment, and

all the devices were started with the factory default configuration. When you are working on a live

network, make sure you understand the potential impact of every command on your network.

This document assumes that you have basic knowledge of DLDP.

Example: Configuring the auto port

shutdown mode

Network configuration

As shown in Figure 1, Device Aand Device B are connected through two fiber pairs.

Configure DLDP on the devices so each device performs the following tasks:

•

Detects unidirectional links caused by cross-connected fibers or a disconnected fiber.

•

Automatically shuts down the faulty interface when detecting a unidirectional link.

•

Automatically brings up the interface after the administrator clears the fault.

Figure 1 Network diagram

Software versions used

This configuration example was created and verified on Release 3606.

Procedures

1. Configure Device A:

# Enable DLDP globally.

<DeviceA> system-view

[DeviceA] dldp global enable

# Configure HundredGigE 1/0/1 and HundredGigE 1/0/2 to operate in full duplex mode at

10000 Mbps, and enable DLDP on the interfaces.

[DeviceA] interface hundredgige 1/0/1

[DeviceA-HundredGigE1/0/1] duplex full

[DeviceA-HundredGigE1/0/1] speed 10000

[DeviceA-HundredGigE1/0/1] dldp enable

[DeviceA-HundredGigE1/0/1] quit

[DeviceA] interface hundredgige 1/0/2

[DeviceA-HundredGigE1/0/2] duplex full

[DeviceA-HundredGigE1/0/2] speed 10000

[DeviceA-HundredGigE1/0/2] dldp enable

[DeviceA-HundredGigE1/0/2] quit

# Set the interval for sending Advertisement packets to 5 seconds (default interval).

[DeviceA] dldp interval 5

# Configure the plain text authentication mode and set the password to abc.

[DeviceA] dldp authentication-mode simple

[DeviceA] dldp authentication-password simple abc

# Set the interface shutdown mode to auto (default mode).

[DeviceA] dldp unidirectional-shutdown auto

2. Configure Device B in the same way Device A is configured. (Details not shown.)

Verifying the configuration

# Display global and interface-specific DLDP configuration for Device A.

[DeviceA] display dldp

DLDP global status: Enabled

DLDP advertisement interval: 5s

DLDP authentication-mode: Simple

HGE1/0/1 HGE1/0/1

HGE1/0/2 HGE1/0/2

Ethernet

fiber port Fiber link

Device A Device B

Tx end Rx end

DLDP authentication-password: ******

DLDP unidirectional-shutdown mode: Auto

DLDP delaydown-timer value: 1s

Number of enabled ports: 2

Interface HundredGigE1/0/1

DLDP port state: Bidirectional

DLDP port unidirectional-shutdown mode: None

DLDP initial-unidirectional-delay: 100s

Number of the port’s neighbors: 1

Neighbor MAC address: 0023-8956-3600

Neighbor port index: 1

Neighbor state: Confirmed

Neighbor aged time: 11s

Neighbor echo time: -

Interface HundredGigE1/0/2

DLDP port state: Bidirectional

DLDP port unidirectional-shutdown mode: None

DLDP initial-unidirectional-delay: 100s

Number of the port’s neighbors: 1

Neighbor MAC address: 0023-8956-3600

Neighbor port index: 2

Neighbor state: Confirmed

Neighbor aged time: 12s

Neighbor echo time: -

The output shows that the DLDP port status of both HundredGigE 1/0/1 and HundredGigE 1/0/2 is

Bidirectional.

# Enable the monitoring of logs on the current terminal for Device A, and set the lowest level of the

logs that can be output to the monitor terminal to 6.

[DeviceA] quit

<DeviceA> terminal monitor

The current terminal is enabled to display logs.

<DeviceA> terminal logging level 6

As shown in Figure 2, the two pairs of fibers between Device A and Device B are cross-connected.

Figure 2 Cross-connected fibers

The following log information is displayed on Device A:

<DeviceA>%Jul 11 17:40:31:089 2018 DeviceA IFNET/3/PHY_UPDOWN: Physical state on the

interface HundredGigE1/0/1 changed to down.

%Jul 11 17:40:31:091 2018 DeviceA IFNET/5/LINK_UPDOWN: Line protocol state on the

interface HundredGigE1/0/1 changed to down.

HGE1/0/1 HGE1/0/1

HGE1/0/2 HGE1/0/2

Device A Device B

%Jul 11 17:40:31:677 2018 DeviceA IFNET/3/PHY_UPDOWN: Physical state on the interface

HundredGigE1/0/2 changed to down.

%Jul 11 17:40:31:678 2018 DeviceA IFNET/5/LINK_UPDOWN: Line protocol state on the

interface HundredGigE1/0/2 changed to down.

%Jul 11 17:40:38:544 2018 DeviceA IFNET/3/PHY_UPDOWN: Physical state on the interface

HundredGigE1/0/1 changed to up.

%Jul 11 17:40:38:836 2018 DeviceA IFNET/3/PHY_UPDOWN: Physical state on the interface

HundredGigE1/0/2 changed to up.

The output shows that the physical status of both HundredGigE 1/0/1 and HundredGigE 1/0/2 is

down and then up. The link status of both interfaces is down.

# Display information about interface HundredGigE 1/0/1 on Device A.

[DeviceA]display interface hundredgige 1/0/1

HundredGigE1/0/1

Current state: UP

Line protocol state: DOWN(DLDP)

Description: HundredGigE1/0/1 Interface

Bandwidth: 10000000kbps

Media type is optical fiber, Port hardware type is 10G_BASE_SR_SFP

Maximum frame length: 9216

Allow jumbo frame to pass

Broadcast max-ratio: 100%

Multicast max-ratio: 100%

Unicast max-ratio: 100%

IP packet frame type: Ethernet II, hardware address: 00e0-fc00-5929

Flow-control is not enabled

Loopback is not set

10Gbps-speed mode, full-duplex mode

Link speed type is force link, link duplex type is force link

PVID: 1

Mdi type: automdix

Port link-type: Access

Tagged Vlan: none

UnTagged Vlan: 1

Port priority: 0

Last link flapping: 0 hours 11 minutes 9 seconds

Last clearing of counters: Never

Peak input rate: 141 bytes/sec, at 2018-01-01 01:37:08

Peak output rate: 84 bytes/sec, at 2018-01-01 05:39:56

Last 300 second input: 0 packets/sec 99 bytes/sec 0%

Last 300 second output: 0 packets/sec 63 bytes/sec 0%

Input (total): 26470 packets, 2469445 bytes

0 unicasts, 1 broadcasts, 26469 multicasts, 0 pauses

Input (normal): 26470 packets, - bytes

0 unicasts, 1 broadcasts, 26469 multicasts, 0 pauses

Input: 0 input errors, 0 runts, 0 giants, 0 throttles

0 CRC, 0 frame, - overruns, 0 aborts

- ignored, - parity errors

Output (total): 16962 packets, 1165236 bytes

0 unicasts, 0 broadcasts, 16962 multicasts, 0 pauses

Output (normal): 16962 packets, - bytes

0 unicasts, 0 broadcasts, 16962 multicasts, 0 pauses

Output: 0 output errors, - underruns, - buffer failures

0 aborts, 0 deferred, 0 collisions, 0 late collisions

0 lost carrier, - no carrier

The output shows that the physical status of HundredGigE 1/0/1 is up, but DLDP automatically

shuts down the interface. The output for interface HundredGigE 1/0/2 is similar to HundredGigE

1/0/1. (Details not shown.)

# Display global and interface-specific DLDP configuration for Device A.

<DeviceA> display dldp

DLDP global status: Enabled

DLDP advertisement interval: 5s

DLDP authentication-mode: Simple

DLDP authentication-password: ******

DLDP unidirectional-shutdown mode: Auto

DLDP delaydown-timer value: 1s

Number of enabled ports: 2

Interface HundredGigE1/0/1

DLDP port state: Unidirectional

DLDP port unidirectional-shutdown mode: None

DLDP initial-unidirectional-delay: 0s

Number of the port’s neighbors: 0 (Maximum number ever detected: 1)

Interface HundredGigE1/0/2

DLDP port state: Unidirectional

DLDP port unidirectional-shutdown mode: None

DLDP initial-unidirectional-delay: 0s

Number of the port’s neighbors: 0 (Maximum number ever detected: 1)

The output shows that the DLDP port status of both HundredGigE 1/0/1 and HundredGigE 1/0/2 is

Unidirectional. DLDP has detected a unidirectional link on both interfaces.

# Correct the fiber connections. As a result, the ports shut down by DLDP automatically recover,

and Device A displays the following log information:

<DeviceA>%Jul 11 17:42:57:709 2018 DeviceA IFNET/3/PHY_UPDOWN: Physical state on the

interface HundredGigE1/0/1 changed to down.

%Jul 11 17:42:58:603 2018 DeviceA IFNET/3/PHY_UPDOWN: Physical state on the interface

HundredGigE1/0/2 changed to down.

%Jul 11 17:43:02:342 2018 DeviceA IFNET/3/PHY_UPDOWN: Physical state on the interface

HundredGigE1/0/1 changed to up.

%Jul 11 17:43:02:343 2018 DeviceA DLDP/6/DLDP_NEIGHBOR_CONFIRMED: A neighbor was

confirmed on interface HundredGigE1/0/1. The neighbor's system MAC is 0023-8956-3600,

and the port index is 1.

%Jul 11 17:43:02:344 2018 DeviceA DLDP/6/DLDP_LINK_BIDIRECTIONAL: DLDP detected a

bidirectional link on interface HundredGigE1/0/1.

%Jul 11 17:43:02:353 2018 DeviceA IFNET/5/LINK_UPDOWN: Line protocol state on the

interface HundredGigE1/0/1 changed to up.

%Jul 11 17:43:02:357 2018 DeviceA IFNET/3/PHY_UPDOWN: Physical state on the interface

HundredGigE1/0/2 changed to up.

%Jul 11 17:43:02:362 2018 DeviceA DLDP/6/DLDP_NEIGHBOR_CONFIRMED: A neighbor was

confirmed on interface HundredGigE1/0/2. The neighbor's system MAC is 0023-8956-3600,

and the port index is 2.

%Jul 11 17:43:02:362 2018 DeviceA DLDP/6/DLDP_LINK_BIDIRECTIONAL: DLDP detected a

bidirectional link on interface HundredGigE1/0/2.

%Jul 11 17:43:02:368 2018 DeviceA IFNET/5/LINK_UPDOWN: Line protocol state on the

interface HundredGigE1/0/2 changed to up.

The output shows that the physical status and link status of both HundredGigE 1/0/1 and

HundredGigE 1/0/2 are up and their DLDP neighbors are determined. The links become

bidirectional.

Configuration files

•

Device A:

dldp global enable

dldp authentication-mode simple

dldp authentication-password cipher $c$3$wHDzwD/AZNW+q+otXapfZ/tUB/Wgbg==

interface HundredGigE1/0/1

speed 10000

duplex full

dldp enable

interface HundredGigE1/0/2

speed 10000

duplex full

dldp enable

•

The configuration file for Device B is the same as Device A. (Details not shown.)

Example: Configuring the manual port

shutdown mode

Network configuration

As shown in Figure 3, Device A and Device B are connected through two fiber pairs.

Configure DLDP on the devices to meet the following requirements:

•

Each device can detect unidirectional links caused by cross-connected fibers or a

disconnected fiber.

•

When a unidirectional link is detected, the administrator can manually shut down the faulty

port based on the connection status of the link.

•

The interface recovers from failure after the administrator clears the fault and manually brings

up the port.

Figure 3 Network diagram

Software versions used

This configuration example was created and verified on Release 3606.

Procedures

1. Configure Device A:

# Enable DLDP globally.

<DeviceA> system-view

[DeviceA] dldp global enable

# Configure HundredGigE 1/0/1 and HundredGigE 1/0/2 to operate in full duplex mode at

10000 Mbps, and enable DLDP on the interfaces.

[DeviceA] interface hundredgige 1/0/1

[DeviceA-HundredGigE1/0/1] duplex full

[DeviceA-HundredGigE1/0/1] speed 10000

[DeviceA-HundredGigE1/0/1] dldp enable

[DeviceA-HundredGigE1/0/1] quit

[DeviceA] interface hundredgige 1/0/2

[DeviceA-HundredGigE1/0/2] duplex full

[DeviceA-HundredGigE1/0/2] speed 10000

[DeviceA-HundredGigE1/0/2] dldp enable

[DeviceA-HundredGigE1/0/2] quit

# Set the interval for sending Advertisement packets to 5 seconds (default interval).

[DeviceA] dldp interval 5

# Configure the plain text authentication mode and set the password to abc.

[DeviceA] dldp authentication-mode simple

[DeviceA] dldp authentication-password simple abc

# Set the interface shutdown mode to manual.

[DeviceA] dldp unidirectional-shutdown manual

2. Configure Device B in the same way Device A is configured. (Details not shown.)

Verifying the configuration

# Display global and interface-specific DLDP configuration for Device A.

[DeviceA] display dldp

DLDP global status: Enabled

DLDP advertisement interval: 5s

DLDP authentication-mode: Simple

HGE1/0/1 HGE1/0/1

HGE1/0/2 HGE1/0/2

Ethernet

fiber port Fiber link

Device A Device B

Tx end Rx end

DLDP authentication-password: ******

DLDP unidirectional-shutdown mode: Manual

DLDP delaydown-timer value: 1s

Number of enabled ports: 2

Interface HundredGigE1/0/1

DLDP port state: Bidirectional

DLDP port unidirectional-shutdown mode: None

DLDP initial-unidirectional-delay: 100s

Number of the port’s neighbors: 1

Neighbor MAC address: 0023-8956-3600

Neighbor port index: 1

Neighbor state: Confirmed

Neighbor aged time: 11s

Neighbor echo time: -

Interface HundredGigE1/0/2

DLDP port state: Bidirectional

DLDP port unidirectional-shutdown mode: None

DLDP initial-unidirectional-delay: 100s

Number of the port’s neighbors: 1

Neighbor MAC address: 0023-8956-3600

Neighbor port index: 2

Neighbor state: Confirmed

Neighbor aged time: 12s

Neighbor echo time: -

The output shows that the DLDP port status of both HundredGigE 1/0/1 and HundredGigE 1/0/2 is

Bidirectional.

# Enable the monitoring of logs on the current terminal for Device A, and set the lowest level of the

logs that can be output to the monitor terminal to 6.

[DeviceA] quit

<DeviceA> terminal monitor

The current terminal is enabled to display logs.

<DeviceA> terminal logging level 6

As shown in Figure 4, the two pairs of fibers between Device A and Device B are cross-connected.

Figure 4 Cross-connected fibers

The following log information is displayed on Device A:

<DeviceA>%Jul 12 08:29:17:786 2018 DeviceA IFNET/3/PHY_UPDOWN: Physical state on the

interface HundredGigE1/0/1 changed to down.

%Jul 12 08:29:17:787 2018 DeviceA IFNET/5/LINK_UPDOWN: Line protocol state on the

interface HundredGigE1/0/1 changed to down.

HGE1/0/1 HGE1/0/1

HGE1/0/2 HGE1/0/2

Device A Device B

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