How to dynamically add a interface that I want to have the daemon listen on?

[Tian Tian]

Dear Sir/Madam,

How to dynamically add/delete a interface that I
do/do-not want to have the daemon listen on if it is
possible?

For example, 
======================================================
I have a dhcpd currently running as:
"./dhcpd -cf /var/etc/dhcpd.conf eth0 eth2 eth3"

then, I want to add another interface eth1 dynamically
to have the daemon listen on without stop the current
dhcpd process (don't want to interrupt the eth0, eth2
and eth3). Or, I want to take away the eth2 from the
daemon without stop the current dhcpd process.

Is it possible to do that?  
======================================================

Thanks!

Tian Tian


       
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