Bug 682863

== Steps to Reproduce ==

1. Start the installation using PXEboot images
2. When prompted, choose a network device to use
3. Select Manual TCP/IP configuration

       ┌────────────────┤ Manual TCP/IP Configuration ├─────────────────┐       
       │                                                                │       
       │ Enter the IPv4 and/or the IPv6 address and prefix (address /   │       
       │ prefix).  For IPv4, the dotted-quad netmask or the CIDR-style  │       
       │ prefix are acceptable. The gateway and name server fields must │       
       │ be valid IPv4 or IPv6 addresses.                               │       
       │                                                                │       
       │ IPv4 address: 10.10.8.188_____ / 255.255.252.0___              │       
       │ Gateway:      10.10.11.254_____________________________        │       
       │ Name Server:  10.10.36.113_____________________________        │       
       │                                                                │       
       │             ┌────┐                        ┌──────┐             │       
       │             │ OK │                        │ Back │             │       
       │             └────┘                        └──────┘             │       
       │                                                                │       
       │                                                                │       
       └────────────────────────────────────────────────────────────────┘       
4. Select Back to attempt to go back

= Additional Information ==

Press <ctrl>Z to drop into a shell.

bash-4.2# tail -n50 /tmp/anaconda.log 
19:46:33,148 INFO loader: kernel command line:
19:46:33,148 INFO loader:     serial
19:46:33,149 INFO loader:     method=http://dell-t5400.test.redhat.com/cobbler/ks_mirror/F-15-Alpha-i386
19:46:33,149 WARN loader: method= is deprecated.  Please use repo= instead.
19:46:33,149 INFO loader:     console=ttyS0
19:46:33,149 DEBUG loader: readNetInfo /tmp/s390net not found, early return
19:46:33,149 INFO loader: anaconda version 15.20.1 on i686 starting
19:46:33,149 INFO loader: text mode forced due to serial/virtpconsole
19:46:33,152 INFO loader: 1048576 kB (1024 MB) are available
19:46:33,153 INFO loader: 1048576 kB (1024 MB) are available
19:46:33,282 DEBUG loader: Saving module ipv6
19:46:33,282 DEBUG loader: Saving module iscsi_ibft
19:46:33,282 DEBUG loader: Saving module iscsi_boot_sysfs
19:46:33,282 DEBUG loader: Saving module pcspkr
19:46:33,282 DEBUG loader: Saving module floppy
19:46:33,282 DEBUG loader: Saving module iscsi_tcp
19:46:33,282 DEBUG loader: Saving module libiscsi_tcp
19:46:33,282 DEBUG loader: Saving module libiscsi
19:46:33,282 DEBUG loader: Saving module scsi_transport_iscsi
19:46:33,282 DEBUG loader: Saving module squashfs
19:46:33,282 DEBUG loader: Saving module cramfs
19:46:33,283 DEBUG loader: Saving module virtio_blk
19:46:33,283 DEBUG loader: Saving module virtio_net
19:46:33,283 DEBUG loader: Saving module virtio_pci
19:46:33,283 DEBUG loader: probing buses
19:46:33,322 DEBUG loader: waiting for hardware to initialize
19:46:33,857 DEBUG loader: probing buses
19:46:33,900 DEBUG loader: waiting for hardware to initialize
19:46:35,439 DEBUG loader: in doLoaderMain, step = STEP_LANG
19:57:05,670 DEBUG loader: going to set language to en_US.UTF-8
19:57:05,670 INFO loader: setting language to en_US.UTF-8
19:57:05,672 DEBUG loader: in doLoaderMain, step = STEP_KBD
19:57:05,672 DEBUG loader: in doLoaderMain, step = STEP_METHOD
19:57:05,672 DEBUG loader: in doLoaderMain, step = STEP_DRIVER
19:57:05,672 DEBUG loader: in doLoaderMain, step = STEP_NETWORK
19:57:05,704 INFO loader: need to set up networking
19:57:05,705 INFO loader: No iBFT table detected.
19:57:07,659 DEBUG loader: in doLoaderMain, step = STEP_IP
19:57:07,659 DEBUG loader: in doLoaderMain, calling setupIfaceStruct()
19:57:07,659 DEBUG loader: in doLoaderMain, calling readNetConfig()
19:57:45,907 DEBUG loader: in configureTCPIP(), detected network boot args, skipping form
19:57:48,571 DEBUG loader: in configureTCPIP(), detected network boot args, skipping form

For the record, this work in rhel6.

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