AMT address conflict is not a conflict

[Stefan Helmert]

AMT uses same MAC- and IP-address like the host network port of the computer. MAAS seems to have a problem with that. MAAS detects all computers that may be controlled by MAAS. Now we can configure the machine e. g. by setting the power configuration to have AMT on a specific IP address. Now MAAS registers that IP-address as "BMC"-IP. That address is now reserved for the BMC and cannot be reused. Now I have to assign a new host-IP-address for the machine. And that is the point everything breaks. MAAS dhcp sets this new IP-address which also changes the AMT-IP-address to this, because AMT and host are sharing the same MAC-address. Now MAAS is not able to switch the computer on using the configured AMT power IP-address. There is only one way to trick MAAS to work: After the host IP is assigned, I can reconfigure the IP in "power configurations" to the host-IP, because on the opposite way the conflict is not detected.

We need a checkbox "shared with host" here.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: maas 2.4.2-7034-g2f5deb8b8-0ubuntu1
ProcVersionSignature: Ubuntu 4.18.0-17.18~18.04.1-generic 4.18.20
Uname: Linux 4.18.0-17-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.6
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sun Apr 14 14:05:41 2019
InstallationDate: Installed on 2019-04-06 (8 days ago)
InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
PackageArchitecture: all
SourcePackage: maas
UpgradeStatus: No upgrade log present (probably fresh install)