From: Rebecca Irvin (rirvin@mail.lesley.edu)
Date: Fri Jan 31 2003 - 09:03:20 CST
Mike,
We experienced a similar problem when we first started as well. I can't
recall who here gave it to me, but using the line
one-lease-per-client true;
worked wonders. Never managed to find what caused those machines to get
multiples, but this stopped it from happening!
Rebecca Irvin
Network Technitian
Lesley University
Cambridge, MA
At 07:57 PM 1/30/03 -0500, you wrote:
>Hello all,
>
>I'm trying to configure my dhcp server from allowing multiple leases to
>the same mac address on a network. I read in the man page of dhcpd.conf
>that I can use the command 'deny duplicates' but so far I can't get it to
>work.
>
>I have defined it both as a global, and in a scope such as:
>
>shared-network VLAN156 {
> subnet 137.99.156.0 netmask 255.255.252.0 {
> option routers 137.99.156.1;
> deny duplicates;
> # Known clients get this pool.
> pool {
> option domain-name-servers 137.99.x.x, 137.99.x.x;
> option broadcast-address 137.99.159.255;
> max-lease-time 604800;
> default-lease-time 604800;
> range 137.99.156.2 137.99.156.99;
> range 137.99.156.141 137.99.159.219;
> deny unknown clients;
> }
> }
> subnet 10.8.156.0 netmask 255.255.254.0 {
> option routers 10.8.156.1;
> deny duplicates;
> # Unknown clients get this pool.
> pool {
> option domain-name-servers 137.99.x.x;
> option broadcast-address 10.8.157.255;
> max-lease-time 120;
> default-lease-time 120;
> range 10.8.156.2 10.8.157.254;
> allow unknown clients;
> }
> }
>}
>
>
>In the syslog I constantly see logs such as....
>
>Jan 30 19:47:39 netreg dhcpd: DHCPREQUEST for 137.99.155.72 from
>00:08:74:e5:df:13 (D7G84421) via 137.99.152.1
>Jan 30 19:47:39 netreg dhcpd: DHCPACK on 137.99.155.72 to
>00:08:74:e5:df:13 (D7G84421) via 137.99.152.1
>Jan 30 19:47:40 netreg dhcpd: DHCPDISCOVER from 00:08:74:e5:df:13
>(D7G84421) via 137.99.152.1
>Jan 30 19:47:40 netreg dhcpd: DHCPOFFER on 137.99.155.72 to
>00:08:74:e5:df:13 (D7G84421) via 137.99.152.1
>Jan 30 19:47:40 netreg dhcpd: DHCPREQUEST for 137.99.155.72 (137.99.25.25)
>from 00:08:74:e5:df:13 (D7G84421) via 137.99.152.1
>Jan 30 19:47:40 netreg dhcpd: DHCPACK on 137.99.155.72 to
>00:08:74:e5:df:13 (D7G84421) via 137.99.152.1
>Jan 30 19:47:51 netreg dhcpd: DHCPDISCOVER from 00:08:74:e5:df:13
>(D7G84421) via 137.99.152.1
>Jan 30 19:47:52 netreg dhcpd: DHCPOFFER on 137.99.154.214 to
>00:08:74:e5:df:13 (D7G84421) via 137.99.152.1
>Jan 30 19:47:52 netreg dhcpd: DHCPREQUEST for 137.99.154.214
>(137.99.25.25) from 00:08:74:e5:df:13 (D7G84421) via 137.99.152.1
>Jan 30 19:47:52 netreg dhcpd: DHCPACK on 137.99.154.214 to
>00:08:74:e5:df:13 (D7G84421) via 137.99.152.1
>
>The above MAC address got 2 IP Leases, I have 76 users getting either 2 or
>3.
>
>Can anyone help me out?
>
>Thanks,
>
>- Mike
>
>Unviersity of Connecticut
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