Bug 830623

Summary: the change in behaviour for asymmetrical routing is not properly described
Product: Red Hat Enterprise Linux 6 Reporter: manuel wolfshant <manuel.wolfshant>
Component: doc-Technical_NotesAssignee: Martin Prpič <mprpic>
Status: CLOSED CURRENTRELEASE QA Contact: ecs-bugs
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 6.3Keywords: Documentation
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
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Fixed In Version: Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2012-06-25 10:07:04 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description manuel wolfshant 2012-06-11 02:50:15 UTC
Description of problem:
http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6-Beta/html/6.3_Technical_Notes/networking_issues.html states "Red Hat Enterprise Linux 6.3 drops packets when the route for outbound traffic differs from the route of incoming traffic." when in fact the change relies only in the default value of the filtering.

Version-Release number of selected component (if applicable):

Revision 1-0	Tue April 24 2012	Martin Prpič
Initial release of the Red Hat Enterprise Linux 6.3 Beta Technical Notes.

How reproducible:
always


Steps to Reproduce:
1. read the URL mentioned above


Actual results:
"Red Hat Enterprise Linux 6.3 drops packets when the route for outbound traffic differs from the route of incoming traffic."

Expected results:

"Due to the new default settings, Red Hat Enterprise Linux 6.3 drops packets when the route for outbound traffic differs from the route of incoming traffic."


Additional info:
IMHO this change in behaviour is very important and the details on how to change the default settings should be publicly available.

Comment 2 Martin Prpič 2012-06-11 11:02:57 UTC
Manuel, I've updated the description so that it now reads:

<snip>
Because RHEL6.3 defaults to using Strict Reverse Path filtering, packets are dropped by default when the route for outbound traffic differs from the route of incoming traffic. This is in line with current recommended practice in RFC3704. For more information about this issue please refer to /usr/share/doc/kernel-doc-<version>/Documentation/networking/ip-sysctl.txt and https://access.redhat.com/knowledge/solutions/53031. 
</snip>

I believe all the information is available from the resources linked to from the description.

Let me know if this is a viable solution for you. Thanks!

Comment 3 manuel wolfshant 2012-06-11 11:05:27 UTC
Wonderful solution. Thank you.

Comment 4 Martin Prpič 2012-06-11 11:29:45 UTC
Great, thank you! This change will be present in the GA version of the document.

Comment 6 Martin Prpič 2012-06-25 10:07:04 UTC
Fix available on docs.redhat.com. Closing!