Description of problem:

when executing ifdown lo:0, it does not report an error but fails to remove the device.

This worked on RHEL6.6 but fails on RHEL6.7. Replacing RHEL6.7 /etc/sysconfig/ifdown-eth with a RHEL6.6 fixed the problem.

Version-Release number of selected component (if applicable):

RHEL6.7

# rpm -qa |grep initscr
initscripts-9.03.49-1.el6.x86_64

How reproducible:

Always
Steps to Reproduce:
1. Install RHEL6.7 and make sure above initscript version is installed.
2. Create the following /etc/sysconfig/network-scripts/ifcfg-lo:0 file:

DEVICE=lo:0
IPADDR=192.55.1.1
NETMASK=255.255.255.255
ONBOOT=yes
NAME=loopback
ARP=no

3. Bring the device up:

# ifup lo:0

4. Now ifdown:

# ifdown lo:0

The device is still there:

# ifconfig
.
.
lo:0      Link encap:Local Loopback  
          inet addr:192.55.38.53  Mask:255.255.255.255
          UP LOOPBACK RUNNING NOARP  MTU:65536  Metric:1

Actual results:

The lo:0 device is not removed.

Expected results:

The lo:0 device should be removed.

Additional info:

I add the following patch:

https://git.fedorahosted.org/cgit/initscripts.git/commit/?h=rhel6-branch&id=78cbc202ad90ffc9256bfd3b45c423eeff0e97b5

However the problem remained. 

Then I changed the following:

if [ "${REALDEVICE}" = "lo" ]; then
       ip addr flush dev ${REALDEVICE} ${LABEL} scope host 2>/dev/null

to

ip addr flush dev ${REALDEVICE} ${LABEL} scope global 2>/dev/null

Here is the diff:

# diff -Naur /etc/sysconfig/network-scripts/ifdown-eth ifdown-eth.fix
--- /etc/sysconfig/network-scripts/ifdown-eth	2016-02-24 22:35:42.092750956 -0500
+++ ifdown-eth.fix	2016-02-24 22:35:07.495844305 -0500
@@ -111,7 +111,7 @@
 		LABEL="label ${DEVICE}"
 	fi
 	if [ "${REALDEVICE}" = "lo" ]; then
-		ip addr flush dev ${REALDEVICE} ${LABEL} scope host 2>/dev/null
+		ip addr flush dev ${REALDEVICE} ${LABEL} scope global 2>/dev/null
 	else
 		ip addr flush dev ${REALDEVICE} ${LABEL} scope global 2>/dev/null
 		ip -4 addr flush dev ${REALDEVICE} ${LABEL} scope host 2>/dev/null

and that fixed the problem.