When cloning SUSE images in proxmox the initial image eth0 network is working but all subsequent aren’t

Reason:
When you clone a VM in Proxmox:

Proxmox changes the NIC MAC address (by design)

The first/original VM keeps the old MAC → works

The clones get a new MAC

On SLES 15 SP7, the network config is often bound to the old MAC

Result:
👉 eth0 config exists
👉 but no interface matches it
👉 so clones have no IPv4 (or no device)

Fix:

1. Identify the real interface

ip link show

Example output:

2: ens192: <BROADCAST,MULTICAST,UP,LOWER_UP>

2. Fix the config file name

ls /etc/sysconfig/network/ifcfg-*

Rename it:

mv /etc/sysconfig/network/ifcfg-eth0 /etc/sysconfig/network/ifcfg-ens192

3. Edit the config

vi /etc/sysconfig/network/ifcfg-ens192

Configure the fixed IP

BOOTPROTO='static'
STARTMODE='auto'
IPADDR='192.168.10.21/24'

Remove any of this lines if present

HWADDR=
ETHTOOL_OPTS=
IPADDR=
NETMASK=

Configure gateway & DNS (global settings)

vi /etc/sysconfig/network/config

set

NETCONFIG_DNS_POLICY="static"

....

NETCONFIG_DNS_STATIC_SERVERS="192.168.1.1,8.8.8.8"

....

Edit routes:

vi /etc/sysconfig/network/routes

add

default 192.168.10.1 - ens192

apply configuration

systemctl restart wicked