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The fcoe config file for NIC is created using /etc/fcoe/eth-cfgx example config file by replacing relevant lines with configured values.
It is eating newlines of the value lines during the process. For example:

original eth-cfgx:
<snip>
## Type:       yes/no
## Default:    no
# Indicate if DCB service is required at the Ethernet port
# Normally set to "yes"
DCB_REQUIRED="yes"

## Type:|_______yes/no
## Default:|____no
# Indicate if VLAN discovery should be handled by fcoemon
# Normally set to "yes"
AUTO_VLAN="yes"
</snip>

becomes:

<snip>
## Type:       yes/no
## Default:    no
# Indicate if DCB service is required at the Ethernet port
# Normally set to "yes"
DCB_REQUIRED="no"
## Type:|_______yes/no
## Default:|____no
# Indicate if VLAN discovery should be handled by fcoemon
# Normally set to "yes"
AUTO_VLAN="yes"
</snip>

when setting DCB_REQUIRED value, note removing the blank line after DCB_REQUIRED="no".

The config file is still valid due to additional newline in the original eth-cfgx but it may change in the future.

https://github.com/rhinstaller/blivet/pull/448

Verified on RHEL-7.3-20160901.1 with anaconda-21.48.22.86-1

New lines in /etc/fcoe/eth-cfgx configs are not eaten anymore so generated file adheres to convention defined in example file.

*with python-blivet-0.61.15.55-1

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2016-2168.html