dhcp server有問題 - Linux

開機時發生no subnet declaration for eth0(192.168.1.254)
的錯誤，dhcp沒啟動，但進入系統後只是將service dhcpd restart
，dhcp就正常了，不知道是哪裡發生問題

我是一張網卡，用ip alias，eth0:192.168.1.254，
eth0:0 192.168.8.254、eth0:1 192.168.9.254，
分配給兩個網段ip192.168.8和.9
以下是dhcpd.conf的設定，請大家幫我看一下，謝謝

default-lease-time 86400;
max-lease-time 777600;

option domain-name "xxx.com.tw";
option broadcast-address 192.168.255.255;
option domain-name-servers 192.168.1.254;
option routers 192.168.1.201;
option subnet-mask 255.255.0.0;
option netbios-name-servers 192.168.1.115;

shared-network network_tag {

subnet 192.168.9.0 netmask 255.255.255.0{
server-identifier 192.168.9.254;
range 192.168.9.1 192.168.9.250;

subnet 192.168.8.0 netmask 255.255.255.0{
server-identifier 192.168.8.254;
range 192.168.8.1 192.168.8.250;


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