H3C DLDP Configuration Examples

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Copyright © 2018 New H3C Technologies Co., Ltd. All rights reserved. No part of this manual may be reproduced or transmitted in any form or by any means without prior written consent of New H3C Technologies Co., Ltd. The information in this document is subject to change without notice.

 

Contents

Introduction· 1

Prerequisites· 1

Example: Configuring the auto port shutdown mode· 1

Network configuration· 1

Software versions used· 1

Procedures· 1

Verifying the configuration· 2

Configuration files· 5

Example: Configuring the manual port shutdown mode· 6

Network configuration· 6

Software versions used· 6

Procedures· 6

Verifying the configuration· 7

Configuration files· 10

Example: Configuring the hybrid port shutdown mode· 11

Network configuration· 11

Software versions used· 11

Restrictions and guidelines· 11

Procedures· 12

Verifying the configuration· 12

Configuration files· 16

Related documentation· 16

 

Introduction

This document provides DLDP configuration examples.

The Device Link Detection Protocol (DLDP) was developed by H3C 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.

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 A and 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 S10500X-CMW710-R7557.

Procedures

1.     Configure Device A:

# Enable DLDP globally.

<DeviceA> system-view

[DeviceA] dldp global enable

# Configure Ten-GigabitEthernet 3/0/1 and Ten-GigabitEthernet 3/0/2 to operate in full duplex mode at 10000 Mbps, and enable DLDP on the interfaces.

[DeviceA] interface ten-gigabitethernet 3/0/1

[DeviceA-Ten-GigabitEthernet3/0/1] duplex full

[DeviceA-Ten-GigabitEthernet3/0/1] speed 10000

[DeviceA-Ten-GigabitEthernet3/0/1] dldp enable

[DeviceA-Ten-GigabitEthernet3/0/1] quit

[DeviceA] interface ten-gigabitethernet 3/0/2

[DeviceA-Ten-GigabitEthernet3/0/2] undo shutdown

[DeviceA-Ten-GigabitEthernet3/0/2] duplex full

[DeviceA-Ten-GigabitEthernet3/0/2] speed 10000

[DeviceA-Ten-GigabitEthernet3/0/2] dldp enable

[DeviceA-Ten-GigabitEthernet3/0/2] 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

 DLDP authentication-password: ******

 DLDP unidirectional-shutdown mode: Auto

 DLDP delaydown-timer value: 1s

 Number of enabled ports: 2

 

Interface Ten-GigabitEthernet3/0/1

 DLDP port state: Bidirectional

 Number of the port’s neighbors: 1

  Neighbor MAC address: 0023-8956-3600

  Neighbor port index: 1

  Neighbor state: Confirmed

  Neighbor aged time: 11s

 

Interface Ten-GigabitEthernet3/0/2

 DLDP port state: Bidirectional

 Number of the port’s neighbors: 1

  Neighbor MAC address: 0023-8956-3600

  Neighbor port index: 2

  Neighbor state: Confirmed

  Neighbor aged time: 12s

The output shows that the DLDP port status of both Ten-GigabitEthernet 3/0/1 and Ten-GigabitEthernet 3/0/2 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 2014 DeviceA IFNET/3/PHY_UPDOWN: Ten-GigabitEthernet3/0/1 link status is DOWN.

%Jul 11 17:40:31:091 2014 DeviceA IFNET/5/LINK_UPDOWN: Line protocol on the interface Ten-GigabitEthernet3/0/1 is DOWN.

%Jul 11 17:40:31:677 2014 DeviceA IFNET/3/PHY_UPDOWN: Ten-GigabitEthernet3/0/2 link status is DOWN.

%Jul 11 17:40:31:678 2014 DeviceA IFNET/5/LINK_UPDOWN: Line protocol on the interface Ten-GigabitEthernet3/0/2 is DOWN.

%Jul 11 17:40:38:544 2014 DeviceA IFNET/3/PHY_UPDOWN: Ten-GigabitEthernet3/0/1 link status is UP.

%Jul 11 17:40:38:836 2014 DeviceA IFNET/3/PHY_UPDOWN: Ten-GigabitEthernet3/0/2 link status is UP.

The output shows that the physical status of both Ten-GigabitEthernet 3/0/1 and Ten-GigabitEthernet 3/0/2 is down and then up. The link status of both interfaces is down.

# Display information about interface Ten-GigabitEthernet 3/0/1 on Device A.

[DeviceA]display interface ten-gigabitethernet 3/0/1

Ten-GigabitEthernet3/0/1

Current state: UP

Line protocol state: DOWN(DLDP)

IP Packet Frame Type: PKTFMT_ETHNT_2, Hardware Address: 00e0-fc00-5929

Description: Ten-GigabitEthernet3/0/1 Interface

Bandwidth: 10000000kbps

Loopback is not set

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

10Gbps-speed mode, full-duplex mode

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

Flow-control is not enabled

The Maximum Frame Length is 10000

Allow jumbo frame to pass

Broadcast MAX-ratio: 100%

Multicast MAX-ratio: 100%

Unicast MAX-ratio: 100%

PVID: 1

Mdi type: automdix

Port link-type: access

 Tagged Vlan:   none

 UnTagged Vlan: 1

Port priority: 0

Last clearing of counters: Never

 Peak value of input: 141 bytes/sec, at 2011-01-01 01:37:08

 Peak value of output: 84 bytes/sec, at 2011-01-01 05:39:56

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

 Last 300 seconds 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 Ten-GigabitEthernet 3/0/1 is up, but DLDP automatically shuts down the interface. The output for interface Ten-GigabitEthernet 3/0/2 is similar to Ten-GigabitEthernet 3/0/1. (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 Ten-GigabitEthernet3/0/1

 DLDP port state: Unidirectional

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

 

Interface Ten-GigabitEthernet3/0/2

 DLDP port state: Unidirectional

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

The output shows that the DLDP port status of both Ten-GigabitEthernet 3/0/1 and Ten-GigabitEthernet 3/0/2 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 2014 DeviceA IFNET/3/PHY_UPDOWN: Ten-GigabitEthernet3/0/1 link status is DOWN.

%Jul 11 17:42:58:603 2014 DeviceA IFNET/3/PHY_UPDOWN: Ten-GigabitEthernet3/0/2 link status is DOWN.

%Jul 11 17:43:02:342 2014 DeviceA IFNET/3/PHY_UPDOWN: Ten-GigabitEthernet3/0/1 link status is UP.

%Jul 11 17:43:02:343 2014 DeviceA DLDP/6/DLDP_NEIGHBOR_CONFIRMED: A neighbor was confirmed on interface Ten-GigabitEthernet3/0/1. The neighbor's system MAC is 0023-8956-3600, and the port index is 1.

%Jul 11 17:43:02:344 2014 DeviceA DLDP/6/DLDP_LINK_BIDIRECTIONAL: DLDP detected a bidirectional link on interface Ten-GigabitEthernet3/0/1.

%Jul 11 17:43:02:353 2014 DeviceA IFNET/5/LINK_UPDOWN: Line protocol on the interface Ten-GigabitEthernet3/0/1 is UP.

%Jul 11 17:43:02:357 2014 DeviceA IFNET/3/PHY_UPDOWN: Ten-GigabitEthernet3/0/2 link status is UP.

%Jul 11 17:43:02:362 2014 DeviceA DLDP/6/DLDP_NEIGHBOR_CONFIRMED: A neighbor was confirmed on interface Ten-GigabitEthernet3/0/2. The neighbor's system MAC is 0023-8956-3600, and the port index is 2.

%Jul 11 17:43:02:362 2014 DeviceA DLDP/6/DLDP_LINK_BIDIRECTIONAL: DLDP detected a bidirectional link on interface Ten-GigabitEthernet3/0/2.

%Jul 11 17:43:02:368 2014 DeviceA IFNET/5/LINK_UPDOWN: Line protocol on the interface Ten-GigabitEthernet3/0/2 is UP.

The output shows that the physical status and link status of both Ten-GigabitEthernet 3/0/1 and Ten-GigabitEthernet 3/0/2 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 Ten-GigabitEthernet3/0/1

 port link-mode bridge

 speed 10000

 duplex full

 dldp enable

#

interface Ten-GigabitEthernet3/0/2

 port link-mode bridge

 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 S10500X-CMW710-R7557.

Procedures

1.     Configure Device A:

# Enable DLDP globally.

<DeviceA> system-view

[DeviceA] dldp global enable

# Configure Ten-GigabitEthernet 3/0/1 and Ten-GigabitEthernet 3/0/2 to operate in full duplex mode at 10000 Mbps, and enable DLDP on the interfaces.

[DeviceA] interface ten-gigabitethernet 3/0/1

[DeviceA-Ten-GigabitEthernet3/0/1] duplex full

[DeviceA-Ten-GigabitEthernet3/0/1] speed 10000

[DeviceA-Ten-GigabitEthernet3/0/1] dldp enable

[DeviceA-Ten-GigabitEthernet3/0/1] quit

[DeviceA] interface ten-gigabitethernet 3/0/2

[DeviceA-Ten-GigabitEthernet3/0/2] undo shutdown

[DeviceA-Ten-GigabitEthernet3/0/2] duplex full

[DeviceA-Ten-GigabitEthernet3/0/2] speed 10000

[DeviceA-Ten-GigabitEthernet3/0/2] dldp enable

[DeviceA-Ten-GigabitEthernet3/0/2] 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

 DLDP authentication-password: ******

 DLDP unidirectional-shutdown mode: Manual

 DLDP delaydown-timer value: 1s

 Number of enabled ports: 2

 

Interface Ten-GigabitEthernet3/0/1

 DLDP port state: Bidirectional

 Number of the port’s neighbors: 1

  Neighbor MAC address: 0023-8956-3600

  Neighbor port index: 1

  Neighbor state: Confirmed

  Neighbor aged time: 11s

 

Interface Ten-GigabitEthernet3/0/2

 DLDP port state: Bidirectional

 Number of the port’s neighbors: 1

  Neighbor MAC address: 0023-8956-3600

  Neighbor port index: 2

  Neighbor state: Confirmed

  Neighbor aged time: 12s

The output shows that the DLDP port status of both Ten-GigabitEthernet 3/0/1 and Ten-GigabitEthernet 3/0/2 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 2014 DeviceA IFNET/3/PHY_UPDOWN: Ten-GigabitEthernet3/0/1 link status is DOWN.

%Jul 12 08:29:17:787 2014 DeviceA IFNET/5/LINK_UPDOWN: Line protocol on the interface Ten-GigabitEthernet3/0/1 is DOWN.

%Jul 12 08:29:17:800 2014 DeviceA IFNET/3/PHY_UPDOWN: Ten-GigabitEthernet3/0/2 link status is DOWN.

%Jul 12 08:29:17:800 2014 DeviceA IFNET/5/LINK_UPDOWN: Line protocol on the interface Ten-GigabitEthernet3/0/2 is DOWN.

%Jul 12 08:29:25:004 2014 DeviceA IFNET/3/PHY_UPDOWN: Ten-GigabitEthernet3/0/1 link status is UP.

%Jul 12 08:29:25:005 2014 DeviceA IFNET/5/LINK_UPDOWN: Line protocol on the interface Ten-GigabitEthernet3/0/1 is UP.

%Jul 12 08:29:25:893 2014 DeviceA IFNET/3/PHY_UPDOWN: Ten-GigabitEthernet3/0/2 link status is UP.

%Jul 12 08:29:25:894 2014 DeviceA IFNET/5/LINK_UPDOWN: Line protocol on the interface Ten-GigabitEthernet3/0/2 is UP.

The output shows that the physical status and link status of both Ten-GigabitEthernet 3/0/1 and Ten-GigabitEthernet 3/0/2 are down and then up.

# Display information about interface Ten-GigabitEthernet 3/0/1 on Device A.

[DeviceA]display interface ten-gigabitethernet 3/0/1

Ten-GigabitEthernet3/0/1

Current state: UP

Line protocol state: UP

IP Packet Frame Type: PKTFMT_ETHNT_2, Hardware Address: 00e0-fc00-5929

Description: Ten-GigabitEthernet3/0/1 Interface

Bandwidth: 10000000kbps

Loopback is not set

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

10Gbps-speed mode, full-duplex mode

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

Flow-control is not enabled

The Maximum Frame Length is 10000

Allow jumbo frame to pass

Broadcast MAX-ratio: 100%

Multicast MAX-ratio: 100%

Unicast MAX-ratio: 100%

PVID: 1

Mdi type: automdix

Port link-type: access

 Tagged Vlan:   none

 UnTagged Vlan: 1

Port priority: 0

Last clearing of counters: Never

 Peak value of input: 141 bytes/sec, at 2011-01-01 01:37:08

 Peak value of output: 104 bytes/sec, at 2011-01-01 06:40:58

 Last 300 seconds input:  0 packets/sec 27 bytes/sec 0%

 Last 300 seconds output:  1 packets/sec 101 bytes/sec 0%

 Input (total):  27226 packets, 2547709 bytes

          0 unicasts, 1 broadcasts, 27225 multicasts, 0 pauses

 Input (normal):  27226 packets, - bytes

          0 unicasts, 1 broadcasts, 27225 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): 17991 packets, 1260564 bytes

          0 unicasts, 0 broadcasts, 17991 multicasts, 0 pauses

 Output (normal): 17991 packets, - bytes

          0 unicasts, 0 broadcasts, 17991 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 and link status of Ten-GigabitEthernet 3/0/1 are up. DLDP does not shut down the interface. The output for interface Ten-GigabitEthernet 3/0/2 is similar to Ten-GigabitEthernet 3/0/1. (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: Manual

 DLDP delaydown-timer value: 1s

 Number of enabled ports: 2

 

Interface Ten-GigabitEthernet3/0/1

 DLDP port state: Unidirectional

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

 

Interface Ten-GigabitEthernet3/0/2

 DLDP port state: Unidirectional

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

The output shows that the DLDP port status of both Ten-GigabitEthernet 3/0/1 and Ten-GigabitEthernet 3/0/2 is Unidirectional. DLDP has detected a unidirectional link on both interfaces but does not shut them down.

# Shut down Ten-GigabitEthernet 3/0/1.

<DeviceA> system-view

[DeviceA] interface ten-gigabitethernet 3/0/1

[DeviceA-Ten-GigabitEthernet3/0/1] shutdown

The following log information is displayed on Device A:

[DeviceA-Ten-GigabitEthernet3/0/1]%Jul 12 08:34:23:717 2014 DeviceA IFNET/3/PHY_UPDOWN: Ten-GigabitEthernet3/0/1 link status is DOWN.

%Jul 12 08:34:23:718 2014 DeviceA IFNET/5/LINK_UPDOWN: Line protocol on the interface Ten-GigabitEthernet3/0/1 is DOWN.

%Jul 12 08:34:23:778 2014 DeviceA IFNET/3/PHY_UPDOWN: Ten-GigabitEthernet3/0/2 link status is DOWN.

%Jul 12 08:34:23:779 2014 DeviceA IFNET/5/LINK_UPDOWN: Line protocol on the interface Ten-GigabitEthernet3/0/2 is DOWN.

The output shows that the physical status and link status of Ten-GigabitEthernet 3/0/1 and Ten-GigabitEthernet 3/0/2 are down.

# Shut down Ten-GigabitEthernet 3/0/2.

[DeviceA-Ten-GigabitEthernet3/0/1] quit

[DeviceA] interface ten-gigabitethernet 3/0/2

[DeviceA-Ten-GigabitEthernet3/0/2] shutdown

# Correct the fiber connections, and bring up Ten-GigabitEthernet 3/0/2.

[DeviceA-Ten-GigabitEthernet3/0/2] undo shutdown

The following log information is displayed on Device A:

[DeviceA-Ten-GigabitEthernet3/0/2]%Jul 12 08:46:17:677 2014 DeviceA IFNET/3/PHY_UPDOWN: Ten-GigabitEthernet3/0/2 link status is UP.

%Jul 12 08:46:17:678 2014 DeviceA IFNET/5/LINK_UPDOWN: Line protocol on the interface Ten-GigabitEthernet3/0/2 is UP.

%Jul 12 08:46:17:959 2014 DeviceA DLDP/6/DLDP_NEIGHBOR_CONFIRMED: A neighbor was confirmed on interface Ten-GigabitEthernet3/0/2. The neighbor's system MAC is 0023-8956-3600, and the port index is 2.

%Jul 12 08:46:17:959 2014 DeviceA DLDP/6/DLDP_LINK_BIDIRECTIONAL: DLDP detected a bidirectional link on interface Ten-GigabitEthernet3/0/2.

The output shows that the physical status and link status of Ten-GigabitEthernet 3/0/2 are up and its DLDP neighbor is determined. The links become bidirectional.

# Bring up Ten-GigabitEthernet 3/0/1.

[DeviceA-Ten-GigabitEthernet3/0/2] quit

[DeviceA] interface ten-gigabitethernet 3/0/1

[DeviceA-Ten-GigabitEthernet3/0/1] undo shutdown

The following log information is displayed on Device A:

[DeviceA-Ten-GigabitEthernet3/0/1]%Jul 12 08:48:25:952 2014 DeviceA IFNET/3/PHY_UPDOWN: Ten-GigabitEthernet3/0/1 link status is UP.

%Jul 12 08:48:25:952 2014 DeviceA DLDP/6/DLDP_NEIGHBOR_CONFIRMED: A neighbor was confirmed on interface Ten-GigabitEthernet3/0/1. The neighbor's system MAC is 0023-8956-3600, and the port index is 1.

%Jul 12 08:48:25:953 2014 DeviceA IFNET/5/LINK_UPDOWN: Line protocol on the interface Ten-GigabitEthernet3/0/1 is UP.

%Jul 12 08:48:25:953 2014 DeviceA DLDP/6/DLDP_LINK_BIDIRECTIONAL: DLDP detected a bidirectional link on interface Ten-GigabitEthernet3/0/1.

The output shows that the physical status and link status of Ten-GigabitEthernet 3/0/1 are up and its DLDP neighbor is 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==

 dldp unidirectional-shutdown manual

#

interface Ten-GigabitEthernet3/0/1

 port link-mode bridge

 speed 10000

 duplex full

 dldp enable

#

interface Ten-GigabitEthernet3/0/2

 port link-mode bridge

 speed 10000

 duplex full

 dldp enable

#

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

Example: Configuring the hybrid port shutdown mode

Network configuration

As shown in Figure 5, Device A and Device B are connected through two fiber pairs.

Configure DLDP to detect unidirectional links. When a unidirectional link is detected, DLDP automatically shuts down the unidirectional port. The administrator needs to bring up the port after clearing the fault.

Figure 5 Network diagram

 

Software versions used

This configuration example was created and verified on S10500X-CMW710-R7557.

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.

Procedures

1.     Configure Device A:

# Enable DLDP globally.

<DeviceA> system-view

[DeviceA] dldp global enable

# Configure Ten-GigabitEthernet 3/0/1 and Ten-GigabitEthernet 3/0/2 to operate in full duplex mode at 10000 Mbps, and enable DLDP on the interfaces.

[DeviceA] interface ten-gigabitethernet 3/0/1

[DeviceA-Ten-GigabitEthernet3/0/1] duplex full

[DeviceA-Ten-GigabitEthernet3/0/1] speed 10000

[DeviceA-Ten-GigabitEthernet3/0/1] dldp enable

[DeviceA-Ten-GigabitEthernet3/0/1] quit

[DeviceA] interface ten-gigabitethernet 3/0/2

[DeviceA-Ten-GigabitEthernet3/0/2] duplex full

[DeviceA-Ten-GigabitEthernet3/0/2] speed 10000

[DeviceA-Ten-GigabitEthernet3/0/2] dldp enable

[DeviceA-Ten-GigabitEthernet3/0/2] 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 hybrid.

[DeviceA] dldp unidirectional-shutdown hybrid

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 on Device A.

[DeviceA] display dldp

 DLDP global status: Enabled

 DLDP advertisement interval: 5s

 DLDP authentication-mode: Simple

 DLDP authentication-password: ******

 DLDP unidirectional-shutdown mode: Hybrid

 DLDP delaydown-timer value: 1s

 Number of enabled ports: 2

Interface Ten-GigabitEthernet3/0/1

 DLDP port state: Bidirectional

 Number of the port’s neighbors: 1

  Neighbor MAC address: 0023-8956-3600

  Neighbor port index: 1

  Neighbor state: Confirmed

  Neighbor aged time: 11s

Interface Ten-GigabitEthernet3/0/2

 DLDP port state: Bidirectional

 Number of the port’s neighbors: 1

  Neighbor MAC address: 0023-8956-3600

  Neighbor port index: 2

  Neighbor state: Confirmed

  Neighbor aged time: 12s

The output shows that both Ten-GigabitEthernet 3/0/1 and Ten-GigabitEthernet 3/0/2 are in bidirectional state, which means both links are bidirectional.

# Enable the monitoring of logs on the current terminal on Device A. Set the lowest level of the logs that can be output to the current 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 6, the two pairs of fibers between Device A and Device B are cross-connected..

Figure 6 Cross-connected fibers

 

The following log information is displayed on Device A:

<DeviceA>%Jan  4 07:16:06:556 2016 DeviceA DLDP/5/DLDP_NEIGHBOR_AGED: A neighbor on interface

Ten-GigabitEthernet3/0/1 was deleted because the neighbor was aged. The neighbor's system MAC is 0023-8956-3600, and the port index is 162.

%Jan  4 07:16:06:560 2016 DeviceA DLDP/5/DLDP_NEIGHBOR_AGED: A neighbor on interface

Ten-GigabitEthernet3/0/2 was deleted because the neighbor was aged. The neighbor's system MAC is 0023-8956-3600, and the port index is 165.

%Jan  4 07:16:06:724 2016 DeviceA IFNET/3/PHY_UPDOWN: Physical state on the interface Ten-GigabitEthernet3/0/1 changed to down.

%Jan  4 07:16:06:730 2016 DeviceA IFNET/3/PHY_UPDOWN: Physical state on the interface Ten-GigabitEthernet3/0/2 changed to down.

%Jan  4 07:16:06:736 2016 DeviceA IFNET/5/LINK_UPDOWN: Line protocol state on the interface Ten-GigabitEthernet3/0/1 changed to down.

%Jan  4 07:16:06:738 2016 DeviceA IFNET/5/LINK_UPDOWN: Line protocol state on the interface Ten-GigabitEthernet3/0/2 changed to down.

%Jan  4 07:16:07:152 2016 DeviceA DLDP/3/DLDP_LINK_UNIDIRECTIONAL: DLDP detected a unidirectional link on interface Ten-GigabitEthernet3/0/1. DLDP automatically shut down the interface. Please manually bring up the interface.

%Jan  4 07:16:07:156 2016 DeviceA DLDP/3/DLDP_LINK_UNIDIRECTIONAL: DLDP detected a unidirectional link on interface Ten-GigabitEthernet3/0/2. DLDP automatically shut down the interface. Please manually bring up the interface.

The output shows that the port status and link status of both Ten-GigabitEthernet 3/0/1 and Ten-GigabitEthernet 3/0/2 are down.

# Display information about interface Ten-GigabitEthernet 3/0/1 on Device A.

[DeviceA]display interface ten-gigabitethernet 3/0/1

Ten-GigabitEthernet3/0/1

Current state: DOWN

Line protocol state: DOWN(DLDP)

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

Description: Ten-GigabitEthernet3/0/1 Interface

Bandwidth: 10000000kbps

Loopback is not set

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

10Gbps-speed mode, full-duplex mode

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

Flow-control is not enabled

Maximum frame length: 9216

Allow jumbo frame to pass

Broadcast max-ratio: 100%

Multicast max-ratio: 100%

Unicast max-ratio: 100%

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 2016-01-01 01:37:08

 Peak output rate: 84 bytes/sec, at 2016-01-01 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 and link status of Ten-GigabitEthernet 3/0/1 are down. The output for interface Ten-GigabitEthernet 3/0/2 is similar to Ten-GigabitEthernet 3/0/1. (Details not shown.)

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

<DeviceA> display dldp

 DLDP global status: Enabled

 DLDP advertisement interval: 5s

 DLDP authentication-mode: Simple

 DLDP authentication-password: ******

 DLDP unidirectional-shutdown mode: Hybrid

 DLDP delaydown-timer value: 1s

 Number of enabled ports: 2

Interface Ten-GigabitEthernet3/0/1

 DLDP port state: Unidirectional

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

Interface Ten-GigabitEthernet3/0/2

 DLDP port state: Unidirectional

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

The output shows that the DLDP port status of both Ten-GigabitEthernet 3/0/1 and Ten-GigabitEthernet 3/0/2 is Unidirectional. DLDP has detected a unidirectional link on both interfaces.

# Correct the fiber connections, and bring up Ten-GigabitEthernet 3/0/1.

<DeviceA> system-view

[DeviceA] interface ten-gigabitethernet 3/0/1

[DeviceA-Ten-GigabitEthernet3/0/1] undo shutdown

The following log information is displayed on Device A:

[DeviceA-Ten-GigabitEthernet3/0/1]%Jan  4 07:33:26:574 2016 DeviceA IFNET/3/PHY_UPDOWN: Physical state on the interface Ten-GigabitEthernet3/0/1 changed to up.

%Jan  4 07:33:57:562 2016 DeviceA DLDP/6/DLDP_NEIGHBOR_CONFIRMED: A neighbor was confirmed on interface Ten-GigabitEthernet3/0/1. The neighbor's system MAC is 0023-8956-3600, and the port index is 162.

%Jan  4 07:33:57:563 2016 DeviceA DLDP/6/DLDP_LINK_BIDIRECTIONAL: DLDP detected a bidirectional link on interface Ten-GigabitEthernet3/0/1.

%Jan  4 07:33:57:590 2016 DeviceA IFNET/5/LINK_UPDOWN: Line protocol state on the interface Ten-GigabitEthernet3/0/1 changed to up.

%Jan  4 07:33:57:609 2016 DeviceA STP/6/STP_DETECTED_TC: Instance 0's port Ten-GigabitEthernet3/0/1 detected a topology change.

The output shows that the port status and link status of Ten-GigabitEthernet 3/0/1 are now up and its DLDP neighbors are determined. The links become bidirectional.

# Bring up Ten-GigabitEthernet 3/0/2.

[DeviceA-Ten-GigabitEthernet3/0/2] quit

[DeviceA] interface Ten-GigabitEthernet3/0/2

[DeviceA-Ten-GigabitEthernet3/0/2] undo shutdown

The following log information is displayed on Device A:

[DeviceA-Ten-GigabitEthernet3/0/2]%Jan  4 07:35:26:574 2016 DeviceA IFNET/3/PHY_UPDOWN: Physical state on the interface Ten-GigabitEthernet3/0/2 changed to up.

%Jan  4 07:35:57:562 2016 DeviceA DLDP/6/DLDP_NEIGHBOR_CONFIRMED: A neighbor was confirmed on interface Ten-GigabitEthernet3/0/2. The neighbor's system MAC is 0023-8956-3600, and the port index is 162.

%Jan  4 07:35:57:563 2016 DeviceA DLDP/6/DLDP_LINK_BIDIRECTIONAL: DLDP detected a bidirectional link on interface Ten-GigabitEthernet3/0/2.

%Jan  4 07:35:57:590 2016 DeviceA IFNET/5/LINK_UPDOWN: Line protocol state on the interface Ten-GigabitEthernet3/0/2 changed to up.

%Jan  4 07:35:57:609 2016 DeviceA STP/6/STP_DETECTED_TC: Instance 0's port Ten-GigabitEthernet3/0/2 detected a topology change.

The output shows that the port status and link status of Ten-GigabitEthernet 3/0/2 are now up and its 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==

 dldp unidirectional-shutdown hybrid

#

interface Ten-GigabitEthernet3/0/1

 port link-mode bridge

 speed 10000

 duplex full

 dldp enable

#

interface Ten-GigabitEthernet3/0/2

 port link-mode bridge

 speed 10000

 duplex full

 dldp enable

#

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

Related documentation

·     H3C S10500X Switch Series High Availability Command Reference-R7557

·     H3C S10500X Switch Series High Availability Configuration Guide-R7557