gns3+IOU使用ntp，发现Clock is unsynchronized, stratum 10, reference is 172.16...

daifengzi

使用linux做ntp服务，之前用gns3的本地镜像做过，可以同步时钟。现在用gns3+IOU，发现能Clock is unsynchronized, stratum 10, reference is 172.16.1.2。求助大神解救。
linux的ntp配置为
dftfile /var/lib/ntp/drift
restrict default nomodify notrap
restrict 127.0.0.1
restrict -6 ::1
server 127.127.1.0
fudge 127.127.1.0 stratum 8
includefile /etc/ntp/crypto/pw
trustedkey 121
keys /etc/ntp/keys

路由器配置为
clock timezone GMT +8
ntp authentication-key 121 md5 DSP@ssw0rd
ntp authenticate
ntp trusted-key 121
ntp server 172.16.1.2 key 121