1.1 Interface Backup Overview................................................................................................................................2

1.2 Interface Backup Features Supported by the AR2200-S....................................................................................3

1.3 Configuring Interface Backup in Active/Standby Mode....................................................................................5

1.3.1 Configure Primary and Backup Interfaces................................................................................................6

1.3.2 Configuring Association Between Interface Backup and NQA................................................................7

1.3.3 Configuring Association Between Interface Backup and BFD.................................................................9

1.3.4 Configuring Association Between Interface Backup and Routing..........................................................12

1.4 Configuring Interface Backup in Load Balancing Mode.................................................................................14

1.4.1 Establishing the Configuration Task.......................................................................................................14

1.4.2 Specifying a Backup Interface.................................................................................................................15

1.4.3 (Optional) Setting the Maximum Bandwidth on Primary Interface........................................................15

1.4.4 Setting the Higher and Lower Thresholds...............................................................................................16

1.4.5 Checking the Configuration.....................................................................................................................16

1.5 Maintaining Interface Backup..........................................................................................................................17

1.5.1 Monitoring the Running Status of Primary and Backup Interfaces.........................................................17

1.6 Configuration Examples...................................................................................................................................17

1.6.1 Example for Configuring Interface Backup in Active/Standby Mode to Implement Ethernet Link Backup

..........................................................................................................................................................................18

1.6.2 Example for Configuring Interface Backup in Load Balancing Mode to Implement Ethernet Link Backup

..........................................................................................................................................................................20

1.6.3 Example for Configuring Interface Backup in Active/Standby Mode on an ISDN Network.................23

1.6.4 Example for Configuring ADSL Link Backup in Interface Backup Mode on a 3G Network (C-DCC)

..........................................................................................................................................................................26

1.6.5 Example for Configuring Association Between Interface Backup and NQA to Implement Ethernet Link

Backup..............................................................................................................................................................29

1.6.6 Example for Configuring Association Between Interface Backup and BFD to Implement Ethernet Link

Backup..............................................................................................................................................................34

1.6.7 Example for Configuring Association Between Interface Backup and Routing to Implement Ethernet Link

Backup..............................................................................................................................................................40

1.6.8 Example for Associating Interface Backup with NQA to Configure an ISDN Interface as the Backup of

an Ethernet Interface.........................................................................................................................................45

1.6.9 Example for Associating Interface Backup with BFD to Configure an ISDN Interface as the Backup of

an Ethernet Interface.........................................................................................................................................51

Issue 01 (2012-01-06)

Huawei Proprietary and Confidential

Contents