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Use High Availability in Active-Standby Mode (For Vigor3900 and Vigor2960)

Published On: Oct 24, 2017 

If you have more then one internet connection line, you have regulated the different LANs to access the internet through the different WANs. Moreover, you want these LANs to be protected by the High Availability to prevent them from the hardware failure, Active-Standby mode will suit your needs. High Availability in Active-Standby can make your network benefit from the multi-WAN and hardware load balance, as well as the hardware redundancy at the same time.

In the following paragraph, we will demonstrate how to set up the Active-Standby mode High Availability with the following topology. As you can see, there are two ISP lines and two LAN subnets. When everything goes right, LAN1 clients will access the internet through ISP-1, and LAN2 clients will go through ISP-2. If one of the routers goes down, then all the LAN clients will go through the online router to access the internet.

a high availability network topology

To use Active-Standby mode, we will need to set up the LAN profiles and the VLAN ID configurations on each router by the following rules:

  1. The LAN profile name and VLAN ID of the corresponding LAN between different must be the SAME.
  2. The routers MUST have the DIFFERENT IP addresses on each LAN.

In this scenario, we use two Vigor3900 to construct an Active-Standby High Availability network:

General Settings of Active-Standby Profile

Here are the general steps of the setting of the Active-Standby Profile, you will need to create the profile for each LAN you would like to have the hardware redundant backup. Create a profile at Applications >> High Availability >> Active-Standby Profile Setup:

Thus, in the scenario above, we have two LAN subnets, and we want to make each subnet go through different routers. Therefore, we will need to create two Active-Standby profiles on each router. Here is a table of the profiles we should configure, we will demonstrate the detail steps in the following paragraphs.

  Vigor3900_A Vigor3900_B
General Setting    
LAN LAN1 LAN2 LAN1 LAN2
LAN IP Address 192.168.10.1 192.168.20.1 192.168.10.2 192.168.20.2
Active-Standby Profile    
HA LAN Profile lan1 lan2 lan1 lan2
Virtual IP for Gateway 192.168.10.254 192.168.20.254 192.168.10.254 192.168.20.254
VHID 1 2 1 2
Role Master Backup Backup Master
Master IP - 192.168.20.2 192.168.10.1 -
Priority ID (0) 1 1 (0)

Vigor3900_A Setup

1. Create LAN1 Active-Standby Profile, go to Applications >> High Availability >> Active-Standby Profile Setup, click Add to create a new profile:

a screenshot of Vigor3900 HA Configuration

2. Create LAN2 Active-Standby profile,

a screenshot of Vigor3900 HA Configuration

3. Enable High-Availability, go to Applications >> High Availability >> High Availability Global Setup,

a screenshot of Vigor3900 HA Configuration
Vigor3900_B Setup

4. Create LAN1 Active-Standby Profile, go to Applications >> High Availability >> Active-Standby Profile Setup, click Add to create a new profile:

a screenshot of Vigor3900 HA Configuration

5. Create a LAN2 Active-Standby profile,

a screenshot of Vigor3900 HA Configuration

6. Enable High Availability (same as step 3), go to Applications >> High Availability >> High Availability Global Setup,

a screenshot of Vigor3900 HA Configuration
Check the High Availability Status

7. After finishing the setting on both routers, now the Active-Standby High Availability should start to protect your network. We can go to Applications >> High Availability >> HA Status page to check the status.

a screenshot of Vigor3900 HA Status

Backup some of the LAN Subnets Only

If your network has more than one LAN subnets, you can just back up some of the LAN subnets. Then the high availability mechanism will be like the diagram below.

a network topology

LAN1 and LAN2 are protected by the HA, while LAN3 and LAN4 are not. If the router goes down, then some of the LAN will not be able to access the internet.

    LAN clients will access internet through the below router, when
  Gateway Both Vigor3900 Up Vigor3900_A Down Vigor3900_B Down
LAN1 192.168.10.254 Vigor3900_A Vigor3900_B Vigor3900_A
LAN2 192.168.20.254 Vigor3900_A Vigor3900_B Vigor3900_A
LAN3 192.168.30.254 Vigor3900_B No internet Vigor3900_A
LAN4 192.168.40.254 Vigor3900_B Vigor3900_B No internet

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