为什么突然ping不通？

mr_wn

一个ping监控程序的log如下：
----222.111.222.126 PING Statistics----
10 packets transmitted, 10 packets received, 0% packet loss
round-trip (ms)  min/avg/max = 45/1057/2854
Sat Sep  3 04:44:04 HKT 2007
PING 222.111.222.126: 56 data bytes
64 bytes from gateway (222.111.222.126): icmp_seq=0. time=690. ms
64 bytes from gateway (222.111.222.126): icmp_seq=1. time=6. ms
64 bytes from gateway (222.111.222.126): icmp_seq=6. time=3579. ms
64 bytes from gateway (222.111.222.126): icmp_seq=8. time=1580. ms
64 bytes from gateway (222.111.222.126): icmp_seq=9. time=582. ms

----222.111.222.126 PING Statistics----
10 packets transmitted, 5 packets received, 50% packet loss
round-trip (ms)  min/avg/max = 6/1287/3579
Sat Sep  3 04:44:25 HKT 2007
PING 222.111.222.126: 56 data bytes
64 bytes from gateway (222.111.222.126): icmp_seq=8. time=4263. ms

----222.111.222.126 PING Statistics----
10 packets transmitted, 1 packets received, 90% packet loss
round-trip (ms)  min/avg/max = 4263/4263/4263
Sat Sep  3 04:44:54 HKT 2007
PING 222.111.222.126: 56 data bytes
ICMP Host Unreachable from gateway clusternode1-priv-physical1 (172.16.0.129)
for icmp from clusternode1-priv-physical1 (172.16.0.129) to gateway (222.111.222.126)
ICMP Host Unreachable from gateway clusternode1-priv-physical1 (172.16.0.129)
for icmp from clusternode1-priv-physical1 (172.16.0.129) to gateway (222.111.222.126)
ICMP Host Unreachable from gateway clusternode1-priv-physical1 (172.16.0.129)
for icmp from clusternode1-priv-physical1 (172.16.0.129) to gateway (222.111.222.126)
ICMP Host Unreachable from gateway clusternode1-priv-physical1 (172.16.0.129)
for icmp from clusternode1-priv-physical1 (172.16.0.129) to gateway (222.111.222.126)
ICMP Host Unreachable from gateway clusternode1-priv-physical1 (172.16.0.129)
for icmp from clusternode1-priv-physical1 (172.16.0.129) to gateway (222.111.222.126)
ICMP Host Unreachable from gateway clusternode1-priv-physical1 (172.16.0.129)
for icmp from clusternode1-priv-physical1 (172.16.0.129) to gateway (222.111.222.126)
ICMP Host Unreachable from gateway clusternode1-priv-physical1 (172.16.0.129)
for icmp from clusternode1-priv-physical1 (172.16.0.129) to gateway (222.111.222.126)
ICMP Host Unreachable from gateway clusternode1-priv-physical1 (172.16.0.129)
for icmp from clusternode1-priv-physical1 (172.16.0.129) to gateway (222.111.222.126)
ICMP Host Unreachable from gateway clusternode1-priv-physical1 (172.16.0.129)
for icmp from clusternode1-priv-physical1 (172.16.0.129) to gateway (222.111.222.126)
ICMP Host Unreachable from gateway clusternode1-priv-physical1 (172.16.0.129)
for icmp from clusternode1-priv-physical1 (172.16.0.129) to gateway (222.111.222.126)

----222.111.222.126 PING Statistics----
10 packets transmitted, 0 packets received, 100% packet loss
Sat Sep  3 04:45:23 HKT 2007
PING 222.111.222.126: 56 data bytes
64 bytes from gateway (222.111.222.126): icmp_seq=0. time=1. ms
64 bytes from gateway (222.111.222.126): icmp_seq=1. time=47. ms
64 bytes from gateway (222.111.222.126): icmp_seq=2. time=1. ms
64 bytes from gateway (222.111.222.126): icmp_seq=3. time=55. ms
64 bytes from gateway (222.111.222.126): icmp_seq=4. time=1. ms
64 bytes from gateway (222.111.222.126): icmp_seq=5. time=23. ms
64 bytes from gateway (222.111.222.126): icmp_seq=6. time=1. ms
64 bytes from gateway (222.111.222.126): icmp_seq=7. time=734. ms
64 bytes from gateway (222.111.222.126): icmp_seq=8. time=95. ms
64 bytes from gateway (222.111.222.126): icmp_seq=9. time=680. ms

----222.111.222.126 PING Statistics----
10 packets transmitted, 10 packets received, 0% packet loss
round-trip (ms)  min/avg/max = 1/163/734
Sat Sep  3 04:45:42 HKT 2007
PING 222.111.222.126: 56 data bytes
64 bytes from gateway (222.111.222.126): icmp_seq=0. time=35. ms
64 bytes from gateway (222.111.222.126): icmp_seq=1. time=12. ms
64 bytes from gateway (222.111.222.126): icmp_seq=2. time=14. ms
64 bytes from gateway (222.111.222.126): icmp_seq=3. time=2. ms
64 bytes from gateway (222.111.222.126): icmp_seq=4. time=13. ms
64 bytes from gateway (222.111.222.126): icmp_seq=5. time=10. ms
64 bytes from gateway (222.111.222.126): icmp_seq=6. time=608. ms
64 bytes from gateway (222.111.222.126): icmp_seq=7. time=19. ms
64 bytes from gateway (222.111.222.126): icmp_seq=8. time=181. ms
64 bytes from gateway (222.111.222.126): icmp_seq=9. time=16. ms

－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－
前面延时很大，然后突然ping不通，信息为

PING 222.111.222.126: 56 data bytes
ICMP Host Unreachable from gateway clusternode1-priv-physical1 (172.16.0.129)
for icmp from clusternode1-priv-physical1 (172.16.0.129) to gateway (222.111.222.126)

稍等又可以ping通
从这里是否可以看出是服务器本身的问题，还是网络问题？

race

本机路由设置出问题了

yuhuohu

有可能是网关负荷过重重启了，或者有环路存在。。。