Bug 1554939

Summary:	Hostsubnet not creating subnets as intended when specifying osm_host_subnet_length during installation
Product:	OpenShift Container Platform	Reporter:	Manikandan Somasundaram <msomasun>
Component:	Networking	Assignee:	Jacob Tanenbaum <jtanenba>
Status:	CLOSED ERRATA	QA Contact:	Meng Bo <bmeng>
Severity:	medium	Docs Contact:
Priority:	low
Version:	3.6.0	CC:	aloughla, aos-bugs, bbennett, hongli
Target Milestone:	---
Target Release:	3.10.0
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	No Doc Update
Doc Text:	undefined	Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-07-30 19:10:40 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Comment 1 Jacob Tanenbaum 2018-03-19 18:52:19 UTC

This is working as intended, to avoid confusion if a subnet extends to the next higher octet we rotate the bits so all subnets with 0's in the shared octet are allocated first. If you had more nodes the system would fill in the gaps.

Comment 2 Jacob Tanenbaum 2018-04-17 16:05:22 UTC

PR link 

https://github.com/openshift/openshift-docs/pull/8523

Comment 4 Hongan Li 2018-05-21 06:25:20 UTC

Doc looks good, bug verified

Comment 6 errata-xmlrpc 2018-07-30 19:10:40 UTC

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/RHBA-2018:1816