Keepalived+LVS报错Destination Host Unreachable

我在10.30.9.204上搭建了个LVS,用ipvsadm命令查看后如下：
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 10.30.9.251:mysql rr persistent 50
-> 10.30.9.211:mysql Route 3 0 0
-> 10.30.9.208:mysql Route 3 0 0
-> 10.30.9.207:mysql Route 3 0 0
-> 10.30.9.206:mysql Route 3 0 0

我在10.30.9.206上通ping通10.30.9.251，但在10.30.9.204上ping 10.30.9.251时就报如下错误：
PING 10.30.9.251 (10.30.9.251) 56(84) bytes of data.
From 10.30.9.204 icmp_seq=2 Destination Host Unreachable
From 10.30.9.204 icmp_seq=3 Destination Host Unreachable
From 10.30.9.204 icmp_seq=4 Destination Host Unreachable

请高手指点！！！
我的keepalived.conf配置文件如下：
! Configuration File for keepalived

global_defs {
notification_email {
chenxz@chen.com
}
notification_email_from chenxz@chen.com
smtp_server 10.30.9.304
smtp_connect_timeout 30
router_id LVS_DEVEL
}

vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 100
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
10.30.9.251/24 dev etho label eth0:1
}
}

virtual_server 10.30.9.251 3306 {
delay_loop 6
lb_algo rr
lb_kind DR
nat_mask 255.255.224.0
persistence_timeout 50
protocol TCP

real_server 10.30.9.206 3306 {
weight 3
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 3306
}
}

real_server 10.30.9.207 3306 {
weight 3
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 3306
}
}
real_server 10.30.9.208 3306 {
weight 3
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 3306
}
}
real_server 10.30.9.211 3306 {
weight 3
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 3306
}
}
}