The option network --bootproto=dhcp --device=eth0 --noipv6 --onboot=yes in the kickstart file nevertheless use ipv6 as well as for the installation (dhcp on ipv6 is tried first and ipv4 is used only as fallback) and for the final system.
Anaconda is a two stage installer - where is the ks file - on physical media or on the network. If it's on the network kicked off with pxelinux or something then you haven't told the first stage not to use ipv6. Also Red Hat Enterprise Linux issues should first be directed to Red Hat Support as on the bugzilla.redhat.com home page: If you are a Red Hat Enterprise Linux customer and have an active support entitlement, please log in to Red Hat Support https://www.redhat.com/apps/support/ for assistance with your issue. Filing through support ensures the appropriate prioritisation and process for Red Hat Enterprise Linux update releases.
> Anaconda is a two stage installer - where is the ks file - on physical media > or on the network. If it's on the network kicked off with pxelinux or > something then you haven't told the first stage not to use ipv6. This is correct, I only set the option in the kickstart file. In fact we use a kickstart file taken over nfs when the computer is started over a PXE environment. But there is nothing in the documentation that such a option is needed by a first stage. The normal understanding is that this option just do what is written in the documentation; switching of the ipv6 support (I can understand if the ipv6 is only disabled in the final installation but not that this option is completely ignored). > Also Red Hat Enterprise Linux issues should first be directed to Red Hat > Support as on the bugzilla.redhat.com home page: > > If you are a Red Hat Enterprise Linux customer and have an active support > entitlement, please log in to Red Hat Support > https://www.redhat.com/apps/support/ for assistance with your issue. Yes I understand. But unfortunate we have a bit difficult support situation in the ETH Zürich. We have a own satellite with a site wide license. But We have unfortunate only limited access to the official support. That's the reason I fill the bug only here. But I will try to enforce it to the official support. In past they told us that we have to register a bug first on bugzilla and later send the report number to our responsible.
Please clarify the use of network options and pxe/netbooting in the installation guide.
reassigning to jwulf for processing
#3: The systems boot over PXE and receive the parameter from DHCP. Then in pxelinux is loaded from tftp. pxelinux is starting the installation with the parameter "APPEND text ks=nfs:xxxx:/xxxx/xxxx/kickstart/ ksdevice=eth0 ramdisk_size=8192 initrd=initrd-redhat-ws5-32 noshell autostep nofallback". Then the installation is done by a kickstart with the snippet above.
A small note: The documentation also write that you have to use "--noipv6=..." but anaconda doesn't work if you specify any value to --noipv6
Removing automation notification
Moving to Don
Thanks Klaus, I've added a warning about this scenario to the Guide; it will become visible next time that we republish the document.