Posted on December 7, 2016 · Posted in VMWare

How to Add a Second NIC to vCenter Server Appliance (VCSA)

By default, vCenter Server Appliance (VCSA) is supplied only with one preconfigured vNIC. However, there are scenarios, in which VMWare vCenter Server has to be connected to different networks (VLAN), for example, to an isolated, backup or replication network. Let’s consider how to add and configure an additional vNIC network card in VCSA.

It has to be noted that adding the second vNIC in vCenter Appliance 5.5 and 6.0 is a bit different.

Adding the Second Network Card (NIC) in vCenter Appliance 5.5

The easiest way to configure network parameters of VMWare vCenter Appliance 5.5 supposes using the web interface, but this interface is very truncated and doesn’t suit more complex scenarios. In particular, it allows to configure only one network card with the IPv4 address. Let’s add the second network card to a VCSA virtual machine using the interface of the VSphere client and place it to the virtual network with the specific VLAN.

adding second network adapter to the vm

Go back to vCenter Appliance web interface. As you can see, the additional network card has not appeared, and there are no buttons to add or configure it.

vcenter appliance ip settings

To configure the IP address of the second network card, we’ll have to connect to the console of VCSA virtual machine as root.

vcenter appliance console

Go to the /inst-sys folder, in which YaST2 (Yet Another Setup Tool) has to be started. Go to Network Devices->Network Settings.

YaST2 control center

You can see a network card with the status ‘Not configured‘ in the list.

vmxnet3 not configured

Let’s configure the static IP address for the new interface. Enter IP address, mask and name of the host in the corresponding fields and press F10.

network card ip settings

To save the changes, press F10 again. Wait till the network settings are applied.

saving network configuration

Go back to the VCSA console. Make sure that eth1 interface with the specified IP settings has appeared in the Network tab.

vcsa additional ip address

If necessary, the settings of both vNICs can be configured in the Address tab.

Adding the Second NIC in vCenter Appliance 6.0

In VCSA 6.0 Update 1, it has become easier to add another network card. You can configure it directly in VMware Appliance Management Interface (VAMI).

  1. First of all, as earlier a new network card is added in the settings of a VCSA virtual machine, the necessary network and VLAN are selected
  2. Then open VCSA Appliance (https://IP_Address_VCSA :5480) web interfacevcsa appliance-web interface
  3. In the left panel, go to the Networking tab. The new network card nic1 will appear in the list of networking interfaces (Networking Interfaces).vcenter server appliance networking
  4. Click Edit, and configure the IP address of the new network card nic1 in the window that appears.vnic1 configuration

Tip. Keep in mind that the subnet mask is specified in /xx format (for example, -> 26), and you won’t be able to set a default gateway for the additional network card.

In the same way, you can add and configure the third and more network cards in VCSA.


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