On 08/26/2016 06:52 PM, [log in to unmask] wrote:
> You need to define static IP's in darcut format ‎on the kernel boot command line now since 7. Look at the kickstart instructions for fedora for details.
> Right or wrong the idea behind it is that with IPv6 ‎coming in the future every one should be using DHCP every where.
>
Well, DHCPv6 is, ah, interesting.  Regardless, there are network 
segments and subnets here where I do not want automatic configuration.  
Period.  It shouldn't be easy for someone to plug something in to this 
particular vlan/segment/subnet and just get a usable IP config.  Those 
are my requirements.  In any case, the question was raised about the 
requirement of DHCP, and, no DHCP is NOT required.  If you pass the 
static IP information on the installer command line you won't even have 
to change that information in the installer.

In the example I present I am using the VNC installation method, mostly 
in order to grab screenshots of the installer.  If you're at the console 
or using virtualization and have the true console going in a window, you 
won't need the portions related to VNC below.

I first needed to know the interface name.  For the server I am 
installing this is 'eno1' which I found by booting the CentOS install 
DVD and running the rescue mode, then issuing an 'ifconfig' from the 
rescue shell.

Upon booting the NetInstall CD, I selected 'install' and hit the tab key 
to get to the options.  My command line (partially sanitized) was:
 >vmlinuz initrd=initrd.img inst.stage2=hd:LABEL=entOS\x207\x20x86_64 
quiet ip=10.250.130.55::10.250.130.254:24:test.pari.edu:eno1:none 
nameserver=192.168.1.3 vnc vncpasswd=nottherealone

When I connected to 10.250.130.55:1 via VNC I was greeted with the 
normal installer sequence.  The very first thing I did was check the 
network settings, and they were carried over from the command line. I 
selected the install source as a network install and http:// selected in 
the pulldown, and put the URL to the install tree there, following the 
instructions at:
http://www.if-not-true-then-false.com/2014/centos-7-netinstall-guide/?PageSpeed=noscript 
(see specifically section 3.10).

The install is now proceeding, using my http server I selected.  You do 
need to make sure the install source is set up properly; this is found 
in Red Hat's upstream documentation at:
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/5/html/Installation_Guide/s1-steps-network-installs-x86.html#idp19192208
(You need to change a few obvious things for either a CentOS or SL install).

While I was writing that last paragraph, the install completed, and I 
have clicked 'reboot' and we'll see if it comes up with the same 
address.... yep, once the 'license' was accepted in text mode (manually, 
of course, meaning I had to manually type things in on the keyboard 
through the KVM switch) everything came up, with the correct IP address, 
and I'm successfully logged-in with ssh.

While I know that I was installing CentOS 7, the SL 7 is basically 
identical (with different branding, mostly) and should work the same way.

If you don't provide the static IP address information on the command 
line you do have the opportunity to select static (the installer uses 
the term 'Manual') addressing through the Network & Hostname spoke's 
Configure button (located in the lower right quadrant of that spoke's 
screen).  Select the interface, click configure, click the 'IPv4 
Settings' tab, and select 'Manual' from the drop-down next to Method.  
Enter your static addressing information in the appropriate blanks of 
the form, and make sure the interface is set to automatically start in 
the General tab (I didn't screencap the General tab, so it might have a 
different term in the actual dialog).

Hope that helps.