Example For Configuring Ldt - Huawei Quidway S9300 Configuration Manual

Quidway S9300 Terabit Routing Switch
Configuration Guide - Ethernet

10.3.1 Example for Configuring LDT

Networking Requirements
When packets sent from a port are sent back to the port, it indicates that a loop exists on the port.
Loops may cause broadcast storm. The LDT function is used to detect loops on the interfaces
of a device.
Configuration Roadmap
The configuration roadmap is as follows:
1.
2.
3.
4.
5.
Data Preparation
To complete the configuration, you need the following data:
l
l
Procedure
Step 1 Enable LDT globally.
<Quidway> system-view
[Quidway] loop-detection enable
Step 2 Enable LDT in a VLAN.
[Quidway] loop-detection enable vlan 200
Step 3 Enable LDT control on an interface.
[Quidway] interface GigabitEthernet 9/0/1
[Quidway-GigabitEthernet9/0/1] stp disable
[Quidway-GigabitEthernet9/0/1] port hybrid pvid vlan 200
[Quidway-GigabitEthernet9/0/1] port hybrid untagged vlan 200
[Quidway-GigabitEthernet9/0/1] loop-detection mode port-shutdown
Step 4 Set the LDT interval on the interface.
[Quidway] loop-detection interval-time 50
Step 5 Set the recovery time of a blocked interface.
[Quidway] interface GigabitEthernet 9/0/1
[Quidway-GigabitEthernet9/0/1] loop-detection recovery-time 20
Step 6 Verify the configuration.
GE 9/0/1 is automatically disabled when a loop is detected.
----End
Issue 03 (2009-08-20)
Enable LDT globally.
Enable LDT in a VLAN.
Enable LDT control on an interface.
Set the LDT interval on the interface.
Set the recovery time of a blocked interface.
ID of the VLAN where LDT is enabled
Number of the interface where LDT control is enabled
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
10 LDT Configuration
10-7