ifdown on a lo (loopback) alias does not work as expected in RHEL 6.7 and 6.8

Solution Verified - Updated -

Issue

  • Running ifdown on a loopback alias does not work. The command runs successfully but the alias address is not removed:

    # ip addr show lo
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet 10.20.30.40/32 brd 10.20.30.40 scope global lo:0
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever

# ifdown lo:0
# echo $?
0

# ip addr show lo
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet 10.20.30.40/32 brd 10.20.30.40 scope global lo:0
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever

Environment

  • Red Hat Enterprise Linux
  • initscripts-9.03.49-1.el6

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