"bounce" a nic in one command?

[Senectus .]

I've just altered the IP settings for a NIC in a remote PC (from DHCP
to Static), I want to do an ifdown eth0 then an ifup eth0 but If I do
an ifdown I'll immediately lose my connection and not be able to get
back to it remotely.
So is there a was to automate the ifup eth0 ? a one line command maybe?
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