Hi All,
I would liket to ask how can i release the ip got form a DHCP server? i have tried command like "pump -r", "dhcpd -k", "ifup", "if down,", delete all the dhcp client and lease under /etc/dhcp* ..but with no hope, what can i do to releaes that IP and get a new one ?
Thansk

The command you want is dhclient.

dhclient /release
dhclient /renew

Note that you'll probably get the same IP straight back again, because DHCP is designed to minimise disruptions and changes. DHCP typically allots your IP from your MAC address, if that doesn't change, the IP most likely won't either.

Damien

hi damien, im having a problem regarding my rh9 dhcp not releasing the ip addresses issued to different clients when they shutdown their pcs, how can i solve this problem? hope you can reply thanks man!

I don't know how to manually force a DHCP server to drop expired leases immediately from shutdown machines. Are the client machines releasing on shutdown? Try forcing a release on a client and check out the leases on the server in the dhcpd.leases file. Check your lease times on the server in etc/dhcpd.conf. You can reduce them to say 3600 seconds, which means every 30 minutes the active clients will attempt to renew their lease, and the server <should> expire leases that much more quickly. I'm by no means a DHCP expert, hopefully someone more informed than me will see this thread and be able to help you.

Damien

try clearing out your dhcpd.leases file

thank you very much logan, but is there any way wherein i can automatically flush the content of dhcpd.leases say for a certain period of time? thanks again man!