hopefully someone can help me.
I have a DHCPD/PXE Server that seems to be assigning 2 IP addresses for the same mac address.
I need computers getting assigned ip addresses to be sequential
I have tried "allow duplicates;" and "deny duplicates;" I can see the ONLY difference is this "uid" line.
Other than this annoyance -- my dhcpd/pxe server works fine.
Heres a snippet from my Leases File:
lease 10.11.46.227 {
starts 4 2014/10/02 15:01:06;
ends 0 2150/11/08 21:29:20;
cltt 4 2014/10/02 15:01:06;
binding state active;
next binding state free;
hardware ethernet 00:1e:67:b9:32:f6;
uid "\000\215\013\011b\345\227\021\343\270\270\000\036g\2712\366";
}
lease 10.11.46.228 {
starts 4 2014/10/02 15:09:13;
ends 0 2150/11/08 21:37:27;
cltt 4 2014/10/02 15:09:13;
binding state active;
next binding state free;
hardware ethernet 00:1e:67:b9:32:f6;
}
Here is my dhcpd.conf
allow booting;
allow bootp;
authoritive;
deny duplicates;
class "pxeclients" {
match if substring(option vendor-class-identifier,0,9) = "PXEClient";
next-server 10.11.0.1;
filename "pxelinux.0";
}
subnet 10.11.0.0 netmask 255.255.0.0 {
range 10.11.1.1 10.11.25.200;
default-lease-time 4294967294;
max-lease-time 4294967294;
min-lease-time 4294967294;
}
# Pxe Server so it doesnt get changed.
host masterPXE {
hardware ethernet 00:1E:67:98:D5:EB;
fixed-address 10.11.0.1;
}
I've seen this with linux systems that have ip=dhcp enabled in kernel options and then a secondary dhcp client that runs in userland that re-requests an IP address.
The easiest solution is to just set your max-lease-time to something small like 5 minutes, or remove the dhcp host id from the user-land client so that it looks like the client is just asking for another DHCP address when it already has one.