If HWADDR= directive is present in the network configuration file then make sure to replace it with MACADDR= directive and its corresponding value as follows: So that this value will be taken as the permanent MAC address of the network interface. Add MACADDR= directive and specify the required MAC address to the /etc/sysconfig/network-scripts/ifcfg-ethX network configuration.If you are not trying to rename your Rhel 7 network devices to ethX style, please see below resolution. Please keep in mind that ethX style naming will not work on Rhel 7. Resolution Assigning permanent MAC address for an Ethernet interface. Force the bond interface to take a MAC address of the slave.
How to assign a permanent MAC address to the bonding interface in RHEL ?.The Network Interface MAC address is changing after each reboot.
scottgus1 Site Moderator Posts: 16795 Joined: 30. It would not always be necessary to change NAT Network adapters' MAC addresses, which could mess up the relationships between the VMs behind the NAT network "router". So clones of those VMs can operate at the same time as the originals (as long as the clones get a new NAT Network name too). NAT Network behaves almost exactly like a real router, and the VMs can have their own private microcosm that the rest of the host LAN doesn't see. NAT and NAT Network put the attached VMs behind a "router", so these VMs have their own private network. Network cards connected via NAT and NAT network are a bit different. Not changing any MAC addresses would be possible, though one would never run the clone and the original at the same time. One might conceive of a situation where one might want a clone as a drop-in copy of the original, and the network wouldn't know the difference.
The other two "Include" options appear to be for not changing any MAC addresses "Include all network adapter MAC addresses" or for not changing just NAT Network (and possibly plain NAT) cards "Include only NAT network adapter MAC addresses". Cloning makes copies of PCs, so having different MAC addresses for all of the new cards is a good idea under most circumstances. This fits with "the default behavior is to reinitialize the MAC addresses of each virtual network card." If two or more network cards on one network have the same MAC address, the protocols on that network, such as DHCP for IP addresses, will get confused. "Generate New MAC Addresses For All Network Adapters value" makes new MAC addresses for each network card.
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