unknown subnet for client address

[Mehmet Ali Öksüz]

Hi All,

i have a strange problem.
my dhcp server has a lot of subnets and pools. all that works fine. 
except one.


Feb 17 08:37:53 aurad02 dhcpd: DHCPINFORM from 194.27.25.181 via 194.27.24.1
Feb 17 08:37:53 aurad02 dhcpd: DHCPINFORM from 194.27.25.181 via 
194.27.24.1: unknown subnet for client address 194.27.25.181
Feb 17 08:37:56 aurad02 dhcpd: DHCPINFORM from 194.27.25.181 via 194.27.24.1
Feb 17 08:37:56 aurad02 dhcpd: DHCPINFORM from 194.27.25.181 via 
194.27.24.1: unknown subnet for client address 194.27.25.181
Feb 17 08:37:56 aurad02 dhcpd: DHCPINFORM from 194.27.24.2 via 
194.27.24.1: unknown subnet for client address 194.27.24.2
Feb 17 08:37:56 aurad02 dhcpd: DHCPINFORM from 194.27.24.2 via 194.27.24.1
Feb 17 08:37:59 aurad02 dhcpd: DHCPINFORM from 194.27.25.161 via 
194.27.24.1: unknown subnet for client address 194.27.25.161


and my dhcpd.conf like this

#########################################################################
#    A.U. BIM DHCP
#########################################################################
authoritative;
ddns-update-style none;
ddns-updates off;
log-facility local6;
option domain-name-servers 10.10.40.10, 10.10.40.11;
default-lease-time 3600;
max-lease-time 3600;
##########################################################################


#
##################################################
# VLAN 2 - 194.27.24.0/23
##################################################
#
#
subnet 194.27.24.0 netmask 255.255.254.0 {
# monitor: 90% 95% Y tnd-akansu
option broadcast-address 194.27.25.255;
option subnet-mask 255.255.254.0;
option routers 194.27.24.1;
range 194.27.24.51 194.27.25.254;
host xx_21746 { hardware ethernet 00:18:fe:6a:d4:fd; }
host xx_21848 { hardware ethernet 00:02:3f:67:b8:3b; }
host xx_22090 { hardware ethernet 90:2B:34:22:9B:AC; }
host xx_22091 { hardware ethernet 90:2B:34:22:70:8D; }
host xx_22092 { hardware ethernet 30:85:A9:91:69:A1; }
host xx_22093 { hardware ethernet 74:D0:2B:26:83:26; }
host xx_22094 { hardware ethernet 30:85:A9:91:96:9E; }
.........................................
host xx_28868 { hardware ethernet 30:85:a9:91:97:29; fixed-address 
194.27.24.40; }
host xx_28871 { hardware ethernet 00:26:73:1a:0d:bf; fixed-address 
194.27.24.41; }
deny unknown-clients;
}


no firewall between host and dhcp server.

any ideas?

thank you.