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https://issues.apache.org/jira/browse/CLOUDSTACK-1539?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13600061#comment-13600061
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Pranav Saxena commented on CLOUDSTACK-1539:
-------------------------------------------

Instead of making a check on the network state which could have been one 
solution , I have compared the old CIDR with the new CIDR and hence activated 
IP reservation !
                
> Editing any parameter in the Network UI results in implementation of IP 
> Reservation.
> ------------------------------------------------------------------------------------
>
>                 Key: CLOUDSTACK-1539
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-1539
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the 
> default.) 
>          Components: UI
>    Affects Versions: 4.2.0
>         Environment: CS : 4.2 Master Builds
> MS : Rhel 6.3
> Host : XEN 6.1
>            Reporter: Abhinav Roy
>            Assignee: Pranav Saxena
>            Priority: Critical
>             Fix For: 4.2.0
>
>
> Steps : 
> ======================
> 1. Deploy a CS advanced network setup
> 2. Create a guest network.
> 3. Now when we try to edit a guest network from UI there are only 5 editable 
> fields ,  "Name" , "Description", "Network offering", "CIDR" & "Network 
> Domain".
> 4. Update network by editing any of the 5 fields mentioned above from UI.
> Expected behaviour :
> ======================
> IP reservation should be implemented only if "CIDR" is changed.
> Observed behaviour :
> =====================
> IP Reservation gets implemented even if we change the name , description or 
> anything else in the given network. Even if you don't change anything and 
> click on the apply button it assumes that we are implementing IP Reservation.
> And the reason for this is , When we update network from the UI , then the 
> API command for updateNetwork which is triggered has the parameter 
> "guestvmcidr" passed with it even if we don't make any changes to that. 
> Ex : I am trying to update and name and description of a network, even then 
> the guestvmcidr is passed in the API and it tries to implement reservation
> 2013-03-06 16:24:35,668 DEBUG [cloud.api.ApiServlet] (catalina-exec-14:null) 
> ===END===  10.144.6.13 -- GET  
> command=updateNetwork&response=json&sessionkey=m9bsDK72fueDiJjtrvNuzGLLl%2Bo%3D&id=941e4471-5f6f-4649-a1ae-5bc7110c2e09&name=N4&displaytext=N4&guestvmcidr=10.0.240.0%2F20&_=1362567305626
> 2013-03-06 16:24:35,670 DEBUG [cloud.async.AsyncJobManagerImpl] 
> (Job-Executor-21:job-93) Executing 
> org.apache.cloudstack.api.command.user.network.UpdateNetworkCmd for job-93
> 2013-03-06 16:24:35,702 ERROR [cloud.async.AsyncJobManagerImpl] 
> (Job-Executor-21:job-93) Unexpected exception while executing 
> org.apache.cloudstack.api.command.user.network.UpdateNetworkCmd
> com.cloud.exception.InvalidParameterValueException: The network must be in 
> Implemented state. IP Reservation cannot be applied in Allocated state
> NOTE : This is not seen when we update network from API

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