@ Dan i am not using FCOE , i am trying to set up logical networks , my oVirt Engine Version: 4.0.6.3-1.el7.centos and my vdsm versions is vdsm-4.18.4.1-0.el7.centos

On Thu, Mar 23, 2017 at 11:26 PM, Dan Kenigsberg <danken@redhat.com> wrote:
On Thu, Mar 23, 2017 at 9:25 AM, martin chamambo <chamambom@gmail.com> wrote:
> I havent set up any hooks and when i try to assign logical networks to an
> already existing interface on the host ,it gives me this error
>
> Hook error: Hook Error: ('Traceback (most recent call last):\n  File
> "/usr/libexec/vdsm/hooks/before_network_setup/50_fcoe", line 18, in
> <module>\n    from vdsm.netconfpersistence import
> RunningConfig\nImportError: No module named netconfpersistence\n',)
>

vdsm-hook-fcoe is installed by default on ovirt-node.
Which version of vdsm (and vdsm-hook-fcoe) are you using?
This Traceback smells like a mismatch between the two.