Dhcp client omnios

• release lease:

 ifconfig nicname dhcp release 

• request lease:

 ifconfig nicname dhcp start 

• dynamic dns with dnsmasq (at least):

as indicated in /etc/default/dhcpagent, edit/create /etc/hostname.nicname with this info: inet hostname

then release and request a dhcp lease. Your dnsmasq leases database contains then the host name, and the dnsmasq dns server is updated with the hostname

update

if you touch the file /etc/dhcp.interface_name (like vnic1, bge0, etc), you do not need to do anything. Just ifconfig nicname dhcp release/start and everything will just work