Failback Job Wizard for Microsoft Hyper-V: Re-IP
When the IP addressing scheme for the replica differs from the IP addressing scheme for the Hyper-V source VMs, your failback job needs relations between source VMs addresses and the replica VMs addresses to be performed successfully. These relations are called Re-IP rules.
Warning
Hyper-V Integration Services must be running on source VMs to enable successful re-IP for your failback job.
To map a source VM IP address to a specific target IP address, do the following on the Re-IP page of the wizard:
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Select Enable Re-IP.
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The Re-IP Rules section opens. Click the Select VMs link.
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The Re-IP dialog opens. In the list of your source VMs, select at least one and close the dialog.
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You have the following options:
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Create a new rule:
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Click Create new rule.
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The New Re-IP Rule dialog opens. Enter source and target settings for the Re-IP rule and click Save.
Note
You can use wildcards for IP addresses.Example
When the 192.168.1.* -> 10.30.30.* Re-IP rule, a source VM IP address such as 192.168.1.50 will be changed to the 10.30.30.50 IP address for your replica failback job.
When there are several Re-IP rules applicable to your source VM, the application will define the most suitable one and apply it to the source VM IP address. 
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Add an existing rule:
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Edit an existing Re-IP rule:
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Hover over the required item in the Re-IP Rules list.
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A toolbar with icons opens to the right of the item. Click the Edit icon.
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The Edit Re-IP Rule dialog box opens. Edit the required properties of the Re-IP rule and click Save.
 
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Delete an existing mapping:
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Hover the pointer over the necessary item in the Re-IP Rules
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A toolbar with icons opens to the right of the item. Click the Delete icon.
 
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To leave the list of existing Re-IP rules intact, go to the next page of the wizard.
 
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Click Next to go to the next page of the wizard.