Mushroom Networks Documentation

VRRP configuration for device failover

Device Failover using VRRP

Mushroom devices support device fail-over using VRRP (Virtual Router Redundancy Protocol). VRRP provides redundancy when the primary device fails. Two mushroom devices that are configured with VRRP contains a master and a slave, which allows to have a backup device on the network.

Mushroom’s devices support active-passive operational mode of VRRP, which implies that when the master is active, slave will always be in passive state or in backup state. Slave comes up or goes into active state only when the master device failure occurs. Device failure can be of two types: power failure and port failure/shutdown. VRRP can be configured to combat these scenarios to get the advantage of having a backup device.

Mushroom device has the flexibility to configure VRRP either on LAN or WAN interface.

Choosing between LAN and WAN interfaces to configure VRRP

VRRP is configured on the LAN interface to provide redundancy in case of LAN interface failure, where you need the LAN interface of the device to be up continuously. (Most preferred deployment)

VRRP is configured on the WAN interface to combat WAN interface failure on a device. Typically, this is used for devices in data-centers where they don’t have any LAN ports connected to them.

Power failure of the device can be categorized in any of the scenarios mentioned above. 

VRRP Configuration

  • Using the LAN IP, by default, log into the UI of the master device. If you would need to change the default LAN IP of the device please check thisThen navigate to the “ADMIN” tab and enable the VRRP config as shown below:

  • Then configure the parameters on the master device as shown below with example values:


  • Now log into the UI of the slave device. Repeat the above steps on the slave device as shown below with example values:


  • Verifying the VRRP Configuration
    • Navigate to the “STATUS” tab and check for “VRRP mode set to MASTER” on the master device, when the master is up. 
    • Navigate to the “STATUS” tab and check for “VRRP mode set to BACKUP” on the slave device, when both the master and slave are up.

Points to note:

  • Same ‘VRRP Id’ should be configured on both devices.
  • ‘VRRP Priority’ should always be higher on master when compared to slave.
  • The ‘Virtual IP’ assigned assigned on both the devices should be same.
  • The ‘WAN Interface’ on which VRRP is configured should also match on both devices. 
  • On the interface that you are setting VRRP, either LAN on WAN, the interface IP’s on both the devices & the Virtual IP should be of the same subnet, but different IP’s.
  • On 1.17 version, when you are configuring VRRP on LAN, the WAN interfaces should be of different IP (or) different subnet. 
  • When configuring VRRP on LAN in pass-through mode, you would need to assign the same IP on both the device’s pass-through configuration, which would be the firewall IP. 
    • Also to access slave device in VRRP+Passthrough deployment, you’d need to add a simple manual n/w route on the slave unit, with device index set to bridge 1& firewall’s IP as the
    • destination.

VRRP Network Scenarios

Frequently Asked Questions about VRRP

What is the VRRP operational mode supported by the Mushroom device?

We support active-passive mode.

Should we have the same settings for Remote Lan/VLL, VoIP Armor etc., on both the master and slave devices?

Yes, except the VRRP config settings & LAN/WAN IP, every other settings are implied to be the same on both master &slave. 

How can I copy configuration settings from the master device to slave?

Before setting up your devices for VRRP, to make sure that both the master and slave devices have the same configuration navigate to the “ADMIN” tab and download the backup file from the master and then upload the same on slave device. When you do this usually the same LAN & WAN IP’s will be applied on the slave device too, which have to be noticed and changed appropriately.

When VRRP is configured on the LAN side, what should be the default gateway for devices behind the mushroom?

The default gateway becomes the virtual IP configured in the VRRP setup.


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