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Description of problem:
Subscription manager sends values like "Unknown" as an ip address value on RHEL 5, and these values are directly set as the host's interface's IP.  As fact uploaded hosts are saved without validation, these cause errors later for things like remote execution which expects to find valid IP's in the interfaces.

How reproducible:
Always

Steps to Reproduce:
1. Have an interface on an el5 box w/out an IP
2. subscription-manager facts | grep ip shows 'Unknown' for that interface
3. Register with subscription manager

Actual results:
Host interface has 'Unknown' as IP

Expected results:
Host interface has no IP

Created redmine issue http://projects.theforeman.org/issues/17115 from this bug

Upstream bug assigned to stbenjam

Upstream bug component is Content Management

Upstream bug assigned to stbenjam

Added KCS https://access.redhat.com/solutions/2728591

Moving this bug to POST for triage into Satellite 6 since the upstream issue http://projects.theforeman.org/issues/17115 has been resolved.

*** Bug 1384970 has been marked as a duplicate of this bug. ***

Verified on 6.3.0 snap 14.0

Registered a host with a custom fact setting the ip address of "Unknown".  Host was created with an interface without an ip address as expected.

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://access.redhat.com/errata/RHSA-2018:0336