Instead of killing the process in order to run dhclient to get a new lease, just release it. See? No need to kill it. Now you can ask for another lease.

So am I the only one out there that likes to set aside blocks? 5 in a row here for ldap replicas, 10 over here for build servers, 101-254 on the next 5 subnets for dhcp addresses… and on and on. In a large organization you wouldn’t have servers mixed in with dhcp addressed workstations would you? So why not try to keep it organized on a small network?!