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It would depend on what you are using for a DCHP client. For example, I don't know of a way to get pump to send a DHCPINFORM, but if your goal is to then actually use the info to configure the interface, I would think the --renew option, which renews the existing lease, might work. If you don't want all of the info that might be returned, you can use other options to suppress it (them).
Your best source of information would be the man page for your particular client.
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