SV: Floods of DHCPREQUEST DHCPACK DHCPINFORM

[Paul Baker]

ddns-update-style none;
ignore client-updates;

authoritative;

subnet 10.100.1.0 netmask 255.255.255.0 {

        option routers                  10.100.1.254;
        option subnet-mask              255.255.255.0;

        option domain-name              "metro.local";
        option domain-name-servers      10.100.1.254;

        option time-offset              36000;

        range 10.100.1.1 10.100.1.253;
        default-lease-time 21600;
        max-lease-time 43200;

}

-----Original Message-----
From: dhcp-users-bounce at isc.org [mailto:dhcp-users-bounce at isc.org] On Behalf
Of Glenn Satchell
Sent: Tuesday, 9 January 2007 11:02 PM
To: dhcp-users at isc.org
Subject: Re: SV: Floods of DHCPREQUEST DHCPACK DHCPINFORM

Can you please post the dhcpd.conf? Put it in the body of the email as
the list software will strip attachments.

regards,
-glenn

>From: "Paul Baker" <paul at inticon.net>
>To: <dhcp-users at isc.org>
>Subject: SV: Floods of DHCPREQUEST DHCPACK DHCPINFORM
>Date: Tue, 9 Jan 2007 22:30:44 +1100
>
>Hi All,
> 
>
>Sorry if this has already been addressed, I am new to the list.
>
> 
>
>This is on a new setup on CentOS 4.3 configured as a firewall/routing box
>with PPPoE dial in.
>
> 
>
>Eth0 = external
>
>Eth1 = internal
>
> 
>
>Running dhcpd -f -d eth1 we are soon flooded by loads of messages such as:
>
> 
>
>DHCPDISCOVER from 00:c0:9f:9a:25:39 (acer-b0474dc4d4) via eth1
>
>DHCPOFFER on 10.100.1.236 to 00:c0:9f:9a:25:39 (acer-b0474dc4d4) via eth1
>
>DHCPDISCOVER from 00:c0:9f:9a:25:39 (acer-b0474dc4d4) via eth1
>
>DHCPOFFER on 10.100.1.236 to 00:c0:9f:9a:25:39 (acer-b0474dc4d4) via eth1
>
>... for tens.. hundreds of lines
>
> 
>
>DHCPINFORM from 10.100.1.251 via eth1
>
>DHCPACK to 10.100.1.251
>
>DHCPINFORM from 10.100.1.251 via eth1
>
>DHCPACK to 10.100.1.251
>
>DHCPINFORM from 10.100.1.251 via eth1
>
>DHCPACK to 10.100.1.251
>
>DHCPINFORM from 10.100.1.251 via eth1
>
>DHCPACK to 10.100.1.251
>
>. and so on,
>
> 
>
>This is the same for DHCPREQUEST and DHCPINFORM packets.
>
> 
>
>Also worth noting. for each of these packets it seems that the server is
>processing the request and creating an entry in dhcpd.leases where
>necessary. resulting in many many entries with the same IP and MAC
>addresses.
>
> 
>
>Thanks for any help.
>
> 
>
>Paul Baker
>
>
>
>