>> You must have access to technology that at least I'm
>> not aware of.  We can automate some parts of the process,
>> like hosts can get new addresses via RA, DHCP, and we
>> have some tools for renumbering routers. But what about
>> addresses embedded in firewall configs, applications,
>> DNS, etc?
>>     
>
>       For the DNS use UPDATE to update the address records.
>       For firewall configs. See your firewall vendor.
>       Very very applications need raw addresses.  Use the DNS.
>   
Bad idea.  DNS fails a lot more often that IP addresses change.


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