SV: Floods of DHCPREQUEST DHCPACK DHCPINFORM

[Paul Baker]

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