Error

sudo salt '*' state.highstate

Output

----------
          ID: eth0
    Function: network.managed
      Result: False
     Comment: Interface file malformed: ['iface', 'eth0', 'inet'].
     Changes:


sudo salt-call -l trace state.highstate

[INFO    ] Executing state network.managed for eth0
[ERROR   ] Interface file malformed: ['iface', 'eth0', 'inet'].
[WARNING ] /usr/lib/python2.7/dist-packages/salt/states/network.py:237: DeprecationWarning: BaseException.message has been deprecated as of Python 2.6
  ret['comment'] = error.message

[ERROR   ] Interface file malformed: ['iface', 'eth0', 'inet'].
[INFO    ] Completed state [eth0] at time 14:54:41.831394