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Releasing external DHCP assigned address

JimmyM
I've been trying to figure out if I can release the DHCP assigned address my ASG gets from my ISP (Verizon FiOS). I've read here that I can do "ifconfig eth0 down". But that just takes down the interface. It doesn't send the DHCP_RELEASE command required by my ISP to actually release the ip lease.
I've also read that I can do "dhcpcd -k" and THAT will send the DHCP_RELEASE. But if I navigate to /var/chroot-dhcpc/usr/sbin and do "./dhcpcd -k" I get a message that no interface was given. If I do "dhcpcd -k eth0" I get a message that dhcpcd isn't running.

So what is it guys? How can I take down my external interface AND send the DHCP_RELEASE command?


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  • 0
    'dhcpcd' has been replaced by 'dhclient'; the new command should be
    chroot /var/chroot-dhcpc /usr/sbin/dhclient -r eth0


    I've only partially tested this, but I don't think it's working...

    tcpdump -i eth0 port 67 or port 68 -e -n
    does not show any dhcp packets.

    Nor does the firewall log show any dropped ones.

    Barry
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  • 0
    'dhcpcd' has been replaced by 'dhclient'; the new command should be
    chroot /var/chroot-dhcpc /usr/sbin/dhclient -r eth0


    I've only partially tested this, but I don't think it's working...

    tcpdump -i eth0 port 67 or port 68 -e -n
    does not show any dhcp packets.

    Nor does the firewall log show any dropped ones.

    Barry
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