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From "Murali Reddy (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CLOUDSTACK-9494) VR ip rules has 'from all lookup' device specific routing table
Date Thu, 22 Sep 2016 07:53:20 GMT

    [ https://issues.apache.org/jira/browse/CLOUDSTACK-9494?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15512515#comment-15512515
] 

Murali Reddy commented on CLOUDSTACK-9494:
------------------------------------------

[~ustcweizhou@gmail.com] Sorry missed your comment.

Yes, i did run into issue.

To start with, 'from all lookup' to the device specific routing table does not make sense,
as there will be ip rules, to explicitly choose routing table based on 'fwmark'.

Control traffic which is not marked was getting up looked up through the device specific routing
table as well due to 'from all lookup' rule. Prior to 4.6, we had rules to throw the traffic
[1] which was not to be routed by the device specific routing table.

If you use 'default via' in the device specific routing table, then control traffic getting
routed wrongly.

[1] https://github.com/apache/cloudstack/blob/4.5/systemvm/patches/debian/config/opt/cloud/bin/ipassoc.sh#L122


> VR ip rules has 'from all lookup' device specific routing table
> ---------------------------------------------------------------
>
>                 Key: CLOUDSTACK-9494
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-9494
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the default.) 
>            Reporter: Murali Reddy
>            Assignee: Murali Reddy
>            Priority: Critical
>             Fix For: 4.10.0.0, 4.9.1.0, 4.8.2.0
>
>
> From 4.6, VR has IP rules like e,g
> "from all lookup table Table_eth2"
> Device specific table should be used for all the traffic.  When we have route 'default
via gateway' route in the device specific routing table , traffic gets routed wrongly on different
interface.



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