Try adding the following dummy network to the Kickstart 

Network --activate --device eth0 ip=10.0.0.1 --netmask=255.255.255.0

This works for me when I have biosdevname=0 in the grub line (otherwise you will get weird device names other than ethX).

-----Original Message-----
From: [log in to unmask] [mailto:[log in to unmask]] On Behalf Of Connie Sieh
Sent: 23 November, 2011 01:46
To: Konstantin Olchanski
Cc: [log in to unmask]
Subject: Re: SL6.1 installer requires internet connection?

On Tue, 22 Nov 2011, Konstantin Olchanski wrote:

> On Tue, Nov 22, 2011 at 04:09:15PM -0600, Connie Sieh wrote:
>> On Tue, 22 Nov 2011, Konstantin Olchanski wrote:
>>
>>> Hi, SL users - I have constructed an SL6 installer USB disk and it works
>>> but after asking all the questions, right before starting to install packages,
>>> it stops and requests that there be an active network connection. The installation
>>> does not seem to proceed until the machine acquires an internet connection.
>>>
>>> Why is this?
>>
>> How did you make the USB image?
>
>
> Same as any bootable USB disk. Partition the USB disk, mkfs, rsync bootable
> filesystem contents, install boot loader.
>
> As follows:
>
> 1) Partition table looks like this:
>
> Disk /dev/sdc: 7996 MB, 7996440576 bytes
> 224 heads, 56 sectors/track, 1245 cylinders
> Units = cylinders of 12544 * 512 = 6422528 bytes
> Sector size (logical/physical): 512 bytes / 512 bytes
> I/O size (minimum/optimal): 512 bytes / 512 bytes
> Disk identifier: 0x00000000
>
>   Device Boot      Start         End      Blocks   Id  System
> /dev/sdc1   *           1        1245     7808612   83  Linux
>
> NOTE: you need to repartition with -H224 -S56 (or whatever) because
> I see some USB disks come with random heads and sectors settings.
>
> NOTE2: note "boot" flag
>
> 2) mke2fs -j /dev/sdc1 as normal, mount /dev/sdc1 /mnt/dst
>
> 3) rsync -av /triumfcs/mirror/SL/6.1/x64_64/os /mnt/dst (same contents as http://ftp.scientificlinux.org/linux/scientific/6.1/x86_64/os)
>
> 4) directory "Packages" is probably not needed
>
> 5) rsync -av .../SL-61-x86_64-2011-11-09-Everything-DVD1.iso .../SL-61-x86_64-2011-07-27-Everything-DVD2.iso /mnt/dst
>

So you should have a /images directory on your usb drive.  Copy the 
/images/updates.img and /images/product.img from 
.../SL-61-x86_64-2011-11-09-Everything-DVD1.iso to /images directory of 
the usb drive.

> 6) cd /mnt/dst, setup "extlinux" (since the original uses isolinux). I use extlinux, mbr.bin, menu.c32 from extlinux-3.86.
>
> 6a) cat mbr.bin > /dev/sdc, ./extlinux -i . (notice the dot)
> 6b) extlinux.conf is a copy of isolinux.cfg with "vesamenu.c32" replaced by "menu.c32" from extlinux-3.86
>
> 7) umount /dev/sdc, try to boot it.
>
>>> I am making an SL6 installer for use on machines located where internet
>>> access is physically impossible, so is there a solution or workaround?
>>>
>>
>> There is a solution to this but I need to know the answer to the
>> above question.
>
>
> Ideally, I would like the installer run from the "Packages" directory rather
> than the DVD iso images.
>
>
>

-Connie Sieh