I have been configured dhcpd with shared-network, but the client doesn't get the correct ip.
Here is the dhcpd log: -------------------------------- Jun 16 13:23:22 proxy dhcpd: DHCPINFORM from 192.168.4.146 Jun 16 13:23:25 proxy dhcpd: DHCPINFORM from 192.168.4.146 Jun 16 13:23:30 proxy dhcpd: DHCPDISCOVER from 00:c0:9f:6b:61:f1 via 192.168.9.254 Jun 16 13:23:30 proxy dhcpd: DHCPOFFER on 192.168.1.101 to 00:c0:9f:6b:61:f1 via 192.168.9.254 Jun 16 13:23:34 proxy dhcpd: DHCPDISCOVER from 00:c0:9f:6b:61:f1 via 192.168.9.254 Jun 16 13:23:34 proxy dhcpd: DHCPOFFER on 192.168.1.101 to 00:c0:9f:6b:61:f1 via 192.168.9.254 Jun 16 13:23:42 proxy dhcpd: DHCPDISCOVER from 00:c0:9f:6b:61:f1 via 192.168.9.254 Jun 16 13:23:42 proxy dhcpd: DHCPOFFER on 192.168.1.101 to 00:c0:9f:6b:61:f1 via 192.168.9.254 Jun 16 13:23:58 proxy dhcpd: DHCPDISCOVER from 00:c0:9f:6b:61:f1 via 192.168.9.254 Jun 16 13:23:58 proxy dhcpd: DHCPOFFER on 192.168.1.101 to 00:c0:9f:6b:61:f1 via 192.168.9.254 Jun 16 13:24:36 proxy dhcpd: DHCPDISCOVER from 00:c0:9f:6b:61:f1 via 192.168.9.254 Jun 16 13:24:36 proxy dhcpd: DHCPOFFER on 192.168.1.101 to 00:c0:9f:6b:61:f1 via 192.168.9.254 Jun 16 13:24:36 proxy dhcpd: DHCPREQUEST for 192.168.1.101 from 00:c0:9f:6b:61:f1 via 192.168.9.254 Jun 16 13:24:36 proxy dhcpd: DHCPACK on 192.168.1.101 to 00:c0:9f:6b:61:f1 via 192.168.9.254 Jun 16 13:24:47 proxy dhcpd: DHCPINFORM from 192.168.4.146 Jun 16 13:24:52 proxy dhcpd: DHCPINFORM from 192.168.4.146 -------------------------------- Host 00:c0:9f:6b:61:f1 should not get ip 192.168.1.101, should be in subnet 192.168.4.0/24. Here is dhcpd.conf: -------------------------------- authoritative; shared-network dhcp { default-lease-time 14400; max-lease-time 43200; option domain-name "example.com"; option www-server 192.168.0.1; option smtp-server 192.168.0.1; option pop-server 192.168.0.1; option ntp-servers 192.168.0.1; option domain-name-servers 192.168.0.1, 210.21.4.130, 202.96.128.166; subnet 192.168.0.0 netmask 255.255.255.0 { option routers 192.168.0.1; range 192.168.0.50 192.168.0.149; } subnet 192.168.1.0 netmask 255.255.255.0 { option routers 192.168.1.1; range 192.168.1.50 192.168.1.149; } subnet 192.168.2.0 netmask 255.255.255.0 { option routers 192.168.2.1; range 192.168.2.50 192.168.2.149; } subnet 192.168.3.0 netmask 255.255.255.0 { option routers 192.168.3.1; range 192.168.3.50 192.168.3.149; } } -------------------------------- Thanks for some help Dongsheng Song