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How to configure VLAN(s) on eth0 Interface





This article covers the necessary steps to configure Virtual LAN (VLAN) on eth0 based on VLAN best practices.  


Product: LoadMaster

Version: Any

Platform: Any

Application: Any

Question/Problem Description:

How to add a VLAN tag on eth0?

Steps to Reproduce:  
Error Message:  
Defect Number:  
Enhancement Number:  
Cause: The LoadMaster administrator may have a requirement to configure VLAN(s) on the eth0 interface.

When deploying a LoadMaster by default the eth0 interface is the management interface, and access to the Web User Interface (WUI) is by default performed via the IP address assigned to this interface. So, as per best practice, a VLAN tag should be added to an interface without an IP configuration. Therefore, creating VLAN(s) on eth0 can be a challenging procedure and that must be well planned. 

Since VLANs can only be created via the Web User Interface (WUI), access to the WUI mustn't be disrupted. Therefore, the WUI access will need to be temporarily moved to a different interface.

Firstly, ensure there is another interface configured with an IP address other than eth0. If none is available, a new interface will need to be created and connected to the relevant network. It is also important to make sure there is connectivity to the IP address that will be used to temporarily access the LoadMaster WUI. 

Once connectivity is confirmed, the WUI access can be moved to the new interface IP address. There are two different approaches to achieve this procedure. 

1) Via SSH

SSH to the device IP address and login using the "bal" user credentials. Navigate to 3 Local Administration -> 4 Web Address -> Choose which address to be used. 

SSH access.png

***Note that this method will require a local client to the chosen subnet to access the LoadMaster WUI via the newly chosen interface IP address. 

2) Via the LoadMaster WUI

Navigate to Certificates & Security -> Remote Access -> Administrator Access (section) -> Allow Web Administrative Access -> Choose which address to use.

WUI access.png

***Note 1: Using this method an Admin Default Gateway can be added to ensure correct routing. 

***Note 2: Alternatively, Allow Multi Interface Access can be enabled (Purple highlight). This means that the LoadMaster can be accessed via any Interface configured with an IP address. However, if this is enabled, access to the IP in other interfaces must be performed with a client local to the interface network. 

Once the LoadMaster WUI access was moved to the new interface, please ensure access to the LoadMaster WUI is possible.

At this point, remove the addressing from eth0 entirely. Once the eth0 interface is cleared, the desired VLAN(s) can be added. For more information on how to add/configure a VLAN in the LoadMaster, please review this article Bonding, VLAN and VXLAN.

Once the VLAN(s) have been successfully added, please ensure there is connectivity to the new VLAN(s) IP address(es). 

If the Global Default Gateway needs to be changed, this can be achieved as per this article (How to Modify the LoadMaster Global Default Gateway to Another Network Interface) instructions. 

The last step is to move the LoadMaster WUI access to its final destination, using either of the methods mentioned above. 


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