Failed to set network while upgrading vCenter Server Appliance from 6.5 U1 to 6.7 U2

Products

• VMware vCenter Server

Issue/Introduction

Symptoms:

• Failed to set network during upgrade of VCSA from 6.5 U1 to 6.7 U2.

Environment

VMware vCenter Server Appliance 6.7.x / 7.x

Cause

The issue occurs when there is a stale / duplicate entry in 10-etho.network.

Resolution

To solve this issue:

1. Take a SSH session to the vCenter
2. enable shell
3. navigate to /etc/systemd/network/10-eth0.network
4. The 10-eth0.network file should look like the sample shown below:
---------------------------------------------------------------------------
[Match]
Name=eth0

[Network]
Gateway=192.168.0.1
Address=192.168.0.45/24
DHCP=yes
DNS=192.168.0.10
Domains=example.com

[DHCP]
UseDNS=false
10-eth0.network 
--------------------------------------------------------------------------------------

5. In case the Domains field has a stale or duplicate entry other than the domain name of your vCenter then correct it to the right value.
    Eg: Domains=example.com example.com   change this to Domains= example.com 
6. Retry / restart the upgrade from stage 2 and the upgrade would bypass the network test as the mismatch of the domain name is corrected.