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. Then the Active-Standby mode High Availability will suit your needs. Active-Standby mode High Availability can make your network be benefited 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 line, and LAN2 clients will go through ISP-2 line. If one of the router goes down, then the related LAN clients will go though the another router to access the internet.
In order to use Active-Standby mode, we will need to up the LAN profiles and the VLAN ID configurations on the each router by the following rules:
In this scenario, we use two Vigor3900 to construct an Active-Standby High Availability network:
Vigor3900_A connects to ISP-1 line, owns LAN1 IP 192.168.10.1, LAN2 IP 192.168.20.1
Vigor3900_B connects to ISP-2 line, owns LAN1 IP 192168.10.2, LAN2 IP 192.168.20.2
The Virtual Gateway IP of LAN1 is 192.168.1.254, LAN2 is 192.168.2.254
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 back it up on each router when using Active-Standby mode.
Go to Applications >> High Availability >> Active-Standby Profile Setup page,
A. Click Add
B. Give a Profile name
C. Choose the LAN which is going to be backup as HA LAN Profile
D. Enter the Virtual IP for Gateway, this IP should be identical on the same HA LAN Profile of each router
E. Enter VHID, Virtual Host ID, each HA LAN profile should have the unique VHID
F. Select the Role
a. Master: the LAN clients will access the internet from this router (with the priority ID 0)
b. Backup: this router will play the backup role, and please enter:
- Master IP: the IP address of the master router
- Priority ID: number range from 1-30, the smaller the number is, the higher priority it has
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 are the table of the profiles we should configure, we will demonstrate the detail steps in the following paragraphs.
1. Create LAN1 Active-Standby Profile, go to Applications >> High Availability >> Active-Standby Profile Setup page,
a. Click Addb. Give a Profile namec. Choose lan1 as HA LAN Profiled. Enter 192.168.10.254 in Virtual IP for Gatewaye. Enter 1 in VHIDf. Select Master as Role
2. Create LAN2 Active-Standby profile,
a. Click Addb. Give a Profile namec. Choose lan2 as HA LAN Profiled. Enter 192.168.20.254 in Virtual IP for Gatewaye. Enter 2 in VHIDf. Select Backup as Role,
- Enter 192.168.20.2 in Master IP- Enter 1 in Priority ID
3. Enable High-Availability, go to Applications >> High Availability >> High Availability Global Setup page,
a. Enable High Availabilityb. Select Active Standby as Redundant Methodc. Enter Authentication Key (The other Vigor3900 should have the SAME authentication key.)d. Enable WAN Connection Status Detection
4. Create LAN1 Active-Standby Profile, go to Applications >> High Availability >> Active-Standby Profile Setup page,
a. Click Addb. Give a Profile namec. Choose lan1 as HA LAN Profiled. Enter 192.168.10.254 in Virtual IP for Gatewaye. Enter 1 in VHIDf. Select Backup as Role,
- Enter 192.168.10.2 in Master IP- Enter 2 in Priority ID
5. Create LAN2 Active-Standby profile,
a. Click Addb. Give a Profile namec. Choose lan2 as HA LAN Profiled. Enter 192.168.20.254 in Virtual IP for Gatewaye. Enter 2 in VHIDf. Select Master as Role
6. Enable High Availability (same as step 3), go to Applications >> High Availability >> High Availability Global Setup page,
7. After finish 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.
If you have a network environment that constructed by more LAN subnets, and you would only want to backup some of the LAN subnets, then the high availability mechanism will be like the diagram below.
LAN1 and LAN2 are protected by the Active-Standby High Availability mechanism.
LAN3 and LAN4 do not have the protection, if the related router goes down, then the LAN will not able to access the internet.
We can set Vigor Router to notify the network administrator by sending email or SMS when the High Availability related events occur, such as:
1. Failover Occurred: the WAN of the primary router goes down and the secondary router takes over,
2. Router Unstable: one of the routers becomes unstable.
Please refer to these application notes, and choose "High Availability" when setting the Notification Object:
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