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https://issues.apache.org/jira/browse/CLOUDSTACK-4294?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13743935#comment-13743935
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ASF subversion and git services commented on CLOUDSTACK-4294:
-------------------------------------------------------------

Commit f8899f2d12713a7bba24666e3229311cc95a336c in branch refs/heads/4.2 from 
[~sateeshc]
[ https://git-wip-us.apache.org/repos/asf?p=cloudstack.git;h=f8899f2 ]

CLOUDSTACK-4294 After upgrade of CloudStack to 4.2, support old vswitch type in 
existing clusters if user changes the vswitch backend to another type of vSwitch

While upgrading to 4.2, the type of vswitch being used by each cluster is 
persisted to cluster_details table. This helps if user want to change the type 
of vswitch used in a zone or entire cloud later on but leave existing cluster 
continue to use old vswitches. Hence even after modifying the type of vswitch 
at cloud level (by modifying global configuration parameters) or modifying the 
type vswitch at zone level (by modifying the traffic label) would not disturb 
operation of existing clusters.

Signed-off-by: Sateesh Chodapuneedi <[email protected]>

                
> After upgrade of CloudStack to 4.2, support old vswitch type in existing 
> clusters if user changes the vswitch backend to another type of vSwitch
> ------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: CLOUDSTACK-4294
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-4294
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the 
> default.) 
>          Components: VMware
>    Affects Versions: 4.2.0
>            Reporter: Sateesh Chodapuneedi
>            Assignee: Sateesh Chodapuneedi
>            Priority: Critical
>             Fix For: 4.2.0
>
>
> In cloudstack deployed with VMware clusters, If user upgrades to 4.2 and 
> would like to leverage dvSwitch as network backend for virtual networks 
> without disturbing existing clusters there needed some mechanism that helps a 
> cluster remember it's existing vswitch type. This helps existing cluster 
> continues to use the vswitch type which is being used before switching the 
> backend to other type of vswitch.

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