Nagios 出现 Time to live exceeded 报警
今天监控系统突然出现报警,服务器出现 Time to live exceeded 报警。
上网一查,发现这个问题是由路由环路引起,于是在监控服务器上面使用traceroute,得到的结果如下:
[root@Monitor ~]# traceroute *。*。*。*
traceroute to 113.31.20.75 (113.31.20.75), 30 hops max, 40 byte packets
1 58.61.152.1 (58.61.152.1) 0.494 ms 1.106 ms 1.385 ms
2 192.168.7.1 (192.168.7.1) 0.580 ms 0.934 ms 1.157 ms
3 58.60.8.237 (58.60.8.237) 0.993 ms 1.290 ms 1.337 ms
4 58.60.8.157 (58.60.8.157) 1.307 ms 1.348 ms 1.478 ms
5 58.60.8.221 (58.60.8.221) 1.216 ms 1.227 ms *
6 58.60.8.125 (58.60.8.125) 3.562 ms 58.60.8.21 (58.60.8.21) 4.544 ms 58.60.8.125 (58.60.8.125) 3.661 ms
7 (202.97.34.105) 37.129 ms (202.97.47.77) 39.422 ms (202.97.34.105) 37.453 ms
8 202.97.49.190 (202.97.49.190) 43.263 ms 43.347 ms (202.97.38.94) 40.386 ms
9 (219.148.65.14) 50.605 ms 50.880 ms 53.270 ms
10 (219.148.65.42) 53.575 ms 54.987 ms 50.833 ms
11 (222.222.192.82) 57.625 ms 57.753 ms 61.009 ms
12 112.33.75.30 (112.33.75.30) 54.674 ms * *
13 112.33.75.29 (112.33.75.29) 53.664 ms 71.596 ms 71.670 ms
14 * * *
15 * * *
16 * 112.33.75.30 (112.33.75.30) 52.113 ms *
17 112.33.75.29 (112.33.75.29) 57.449 ms 56.931 ms 70.911 ms
18 * * *
19 112.33.75.29 (112.33.75.29) 55.327 ms * 113.31.15.29 (113.31.15.29) 73.401 ms
20 * * *
21 112.33.75.29 (112.33.75.29) 54.364 ms 52.161 ms 54.489 ms
22 * * *
23 112.33.75.29 (112.33.75.29) 52.190 ms 54.523 ms 52.369 ms
24 * * *
25 112.33.75.29 (112.33.75.29) 52.510 ms 52.616 ms 52.639 ms
26 113.33.75.30 (112.33.75.30) 55.772 ms * *
27 * 112.33.75.29 (112.33.75.29) 53.401 ms 53.387 ms
28 * 112.33.75.30 (112.33.75.30) 55.450 ms *
29 112.33.75.29 (112.33.75.29) 57.475 ms 57.481 ms 58.976 ms
30 * * *
在113.31.15.29和113.31.25.30之间不断的出现循环,直到把ICMP的TTL用光,返回Time to live exceeded,于是监控系统就报警了。
打电话到机房,得到的结果是上层在调整路由,导致出现环路。等待机房调整完,网络正常。
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