CE Install and use of Backplane LAN | Nutanix Community
Skip to main content

What is the relationship between ntnx0 and the Backplane LAN?

I’m running CE with 1 node, but plan to add a second at some point.

When I attempt to configure the Backplan LAN I get the error:

Error while creating Backplane LAN: Failed in cluster setup validation with error Minimum 3 nodes required in cluster

Do I need 3 nodes to investigate how the Backplane LAN works?

Really looking for how to isolate ntnx0 in a VLAN on br0 separate from AHV and CVM management network (VLAN).

Cpuple of things:

  1. you cannot expand a single node cluster. 
  2. there is no 2 node cluster (3 is the minimum)
  3. on a single node cluster ahv/cvm traffic is internal only so it doesnt make sense to backplane it.
  4. and yes, 3 nodes is the minimum for backplane lan. 

Jeroen,

Thanks for the information!

I will need to add 2 more nodes and build again when I want to explore that functionality.

I used this resource:

https://github.com/smzksts/NutanixCE-Community-HCL

to decide on my first node and it is working well:

[root@NTNX-244131ad-A ~]# sudo dmidecode | grep -A3 '^System Information'
System Information
        Manufacturer: HP
        Product Name: HP EliteDesk 800 G4 SFF
        Version: SBKPF
root@NTNX-244131ad-A ~]# 

Do you have a link to read about the Backplane VLAN and how it relates to ntnx0?

Is there an online cluster sandbox?

The backplan lan setup is pretty self explaining when you want to configure it. (I will paste some screenshots later here, as I got it on my todo list for today. 😉 )

 

There are sandboxes available in the nutanix test drive: https://www.nutanix.com/one-platform

But I think it is not possible to configure the backplane lan in those test drives. 

If you want to enable backplane lan (node to node, cluster internal traffic, on separate subnet/interfaces) here are the steps. 

 

In Prism Element go to settings → Network Configuration → Internal Interfaces → Click configure behind Backplane LAN.

Fill in the fields: 

Make sure you select the correct virtual switch and correct vlan. If you have created a separate virtual switch for this (with dedicated uplinks) select that one. Click "Verify and Save”. If you get the error that all AHV hosts must be in maintenance mode you must do the following steps first: https://portal.nutanix.com/page/documents/kbs/details?targetId=kA07V000000LaHfSAK 

Reply


Terms & Conditions