VIP和LB地址同网段的，单网卡
VIP 192.168.1.200
LB地址 192.168.1.203
RS1 192.168.1.215
RS2 192.168.1.121
echo 1 >/proc/sys/net/ipv4/ip_forward
echo 0 >/proc/sys/net/ipv4/conf/all/send_redirects
echo 0 >/proc/sys/net/ipv4/conf/default/send_redirects
echo 0 >/proc/sys/net/ipv4/conf/eth0/send_redirects
/sbin/ifconfig eth0:0 192.168.1.200 broadcast 192.168.1.200 netmask 255.255.255.255 up
/sbin/route add -host 192.168.1.200 dev eth0:0
/sbin/ipvsadm -C
/sbin/ipvsadm -A -t 192.168.1.200:80 -s wlc
/sbin/ipvsadm -a -t 192.168.1.200:80 -r 192.168.1.121:80 -m -w 10
/sbin/ipvsadm -a -t 192.168.1.200:80 -r 192.168.1.215:80 -m -w 8
LB转发不出去，在LB上访问192.168.1.200可以切换RS1和RS2，但是除了LB以外此地址都不可被访问
