Dear Friends I have 2 netcards (eth0 to Internet and eth1 to internal network) in CENTOS 4.2, bit when I boot system the up eth0 and et1i [OK]. When I run ifconfig the eth1 has not IP configure, then I run command ifdown eth1 and ifup eth1, after eth1 is work perfect. Below I show file /etc/sysconfig/network-scripts/ifcfg-eth1 # Please read /usr/share/doc/initscripts-*/sysconfig.txt # for the documentation of these parameters. IPV6INIT=no ONBOOT=yes USERCTL=no PEERDNS=yes TYPE=Ethernet DEVICE=eth1 HWADDR=00:60:08:3e:0a:d1 BOOTPROTO=none NETMASK=255.255.255.0 IPADDR=192.168.1.1 and route-eth1 GATEWAY0=192.168.1.1 NETMASK0=255.255.255.0 ADDRESS0=192.168.1.0 When I run ifup eth1 , follow messages show me. ifup eth1 RTNETLINK answers: File exists When I run command route -n , follow messages show me. # route -n 192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1 But I don't know net 169.254.0.0. Thanks Adriano