Bug 728985

Summary:	New FAQ for multiple network interfaces
Product:	Red Hat Enterprise MRG	Reporter:	Robert Rati <rrati>
Component:	Grid_User_Guide	Assignee:	Alison Young <alyoung>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Tomas Rusnak <trusnak>
Severity:	high	Docs Contact:
Priority:	high
Version:	2.0	CC:	ltoscano, trusnak
Target Milestone:	2.0.1
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2011-09-07 22:48:21 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	733588
Bug Blocks:

Description Robert Rati 2011-08-08 14:52:02 UTC

Description of problem:
Q: Why is MRG Grid choosing a specific network interface?
A: When MRG Grid is run on a node with multiple network interfaces it will attempt to choose which interface it believes is the correct one for communications.  If MRG Grid chooses the incorrect interface, the node could fail to communicate with other parts of MRG Grid correctly.  It is possible to see which interface MRG Grid is choosing by adding D_HOSTNAME to the logging for the daemon(s) having problems.  It is possible to force MRG Grid to use a specific network interface by setting the parameter NETWORK_INTERFACE to the IP address or network interface device that MRG Grid should use.

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Comment 3 Tomas Rusnak 2011-08-23 10:00:43 UTC

Change confirmed in chapter Chapter 20. Frequently Asked Questions:

Q: Why is MRG Grid choosing a specific network interface?? 

When MRG Grid is run on a node with multiple network interfaces it attempts to choose which interface it believes is the correct one for communications. If MRG Grid selects the incorrect interface, the node could fail to communicate with other parts of MRG Grid correctly.
To see which interface MRG Grid is choosing, add D_HOSTNAME to the logging for the daemon(s) having problems. You can force MRG Grid to use a specific network interface by setting the parameter NETWORK_INTERFACE to the IP address or network interface device that MRG Grid should use. 

Revision history updated:

Revision 1-2	Wed Aug 10 2011	Alison Young
BZ#728985 - multiple network interface FAQ update

>>> VERIFIED