About this task
 
		 The following steps must be performed to migrate from a non-MT environment to an MT environment.
		
 
	 
 
	 Procedure
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		   Assume that the entire network is not an IPv6 IS-IS MT environment, and ensure that all the routes are correct.
		   
		
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		   Use the 
			 multi-topology command with the 
			 transition parameter to enable transition mode on each router one by one, and ensure that all the routes are correct.
		   
		
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		   After all the routers are in transition mode, use the 
			 no multi-topology command with the 
			 transition parameter to disable transition mode on each router one by one. Ensure that all the routes are correct.
		   
		
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		   Change the topology to make IPv4 and IPv6 different.