[time] Monitoring system

Anthony DeRobertis asd
Wed Nov 12 21:58:24 UTC 2003


On Nov 12, 2003, at 13:17, Guillermo Ballester Valor wrote:
>
> I've been trying to find the reason of such poor performance reported 
> by the
> monitoring system. I changed the server, the router, and I couldn't 
> find the
> reason. As you can see, it is declared unreachable most of the time.

anthony at Kuno:~$ ntpq -nc peers | grep 217.127.2.161; ntpq -c rv
  217.127.2.161   130.206.3.166    2 u  56m 1024   50  180.634    5.697  
  2.222
status=06f4 leap_none, sync_ntp, 15 events, event_peer/strat_chg,
version="ntpd 4.1.0 Mon Mar 25 23:39:47 UTC 2002 (2)", processor="i686",
system="Linux2.4.22-kuno", leap=00, stratum=2, precision=-18,
rootdelay=0.628, rootdispersion=22.212, peer=21564,
refid=ntp.derobert.net,
reftime=c35d189b.3cf82f51  Wed, Nov 12 2003 15:37:47.238, poll=10,
clock=c35d1a6c.30c7c0f4  Wed, Nov 12 2003 15:45:32.190, state=4,
offset=0.167, frequency=8.262, jitter=0.055, stability=0.000


anthony at Kuno:/var/log/ntpstats$ grep 217.127.2.161 peerstats
52955 2144.821 217.127.2.161 90f4 0.027948500 0.182339000 7.937505722 
0.000003815
52955 4710.843 217.127.2.161 90f4 0.007300500 0.182521000 3.947131083 
0.020648000
52955 13222.910 217.127.2.161 90f4 0.001768500 0.179301000 7.937505722 
0.000003815
52955 13349.908 217.127.2.161 90f4 0.002256000 0.176546000 3.937984833 
0.000487500
52955 21670.977 217.127.2.161 90f4 0.003016000 0.176516000 7.937505722 
0.000003815
52955 21867.981 217.127.2.161 90f4 0.003016000 0.176516000 3.938986083 
0.001132500
52955 22890.990 217.127.2.161 90f4 0.001883500 0.177931000 1.947470014 
0.000037000
52955 23916.009 217.127.2.161 90f4 0.000006000 0.189594000 0.947306666 
0.001914500
52955 32559.395 217.127.2.161 90f4 -0.156743000 0.503226000 7.937513222 
0.000003815
52955 35972.097 217.127.2.161 90f4 0.006400500 0.177185000 7.937513222 
0.000003815
52955 36229.098 217.127.2.161 90f4 0.006547500 0.176089000 3.938483583 
0.000147000
52955 47322.191 217.127.2.161 90f4 0.006264000 0.177188000 7.937505722 
0.000003815
52955 47581.196 217.127.2.161 90f4 0.006264000 0.177188000 3.939451083 
0.001695000
52955 53729.243 217.127.2.161 90f4 0.005260500 0.176047000 1.972578139 
0.000691500
52955 62054.315 217.127.2.161 90f4 0.003792000 0.179340000 7.937505722 
0.000003815
52955 62182.316 217.127.2.161 90f4 0.008239500 0.179229000 3.937988583 
0.004447500
52955 69348.376 217.127.2.161 90f4 0.003474500 0.179881000 1.978058764 
0.004765000
52955 71396.394 217.127.2.161 90f4 0.005697000 0.180634000 1.962466264 
0.002222500

>
> As a aditional test, I usually check with 'ntpq -pn' a sever here in 
> Spain
> sincronized with mine, and NEVER mine has declared as unreacheble, and 
> reach
> is always '377'. (well, NEVER is not true, the server was really 
> unreachable
> when I was changing hardware to fix the problem).
>
> Any idea of what is the problem?.

Maybe the international links to/from spain?

A quick check doesn't show anything, except for a few lag spikes:

anthony at Kuno:~$ mtr -t 217.127.2.161

                            Matt's traceroute  [v0.48]
Kuno                                                   Wed Nov 12 
15:57:04 2003
Keys:  D - Display mode    R - Restart statistics    Q - Quit
                                            Packets               Pings
Hostname                                %Loss  Rcv  Snt  Last Best  Avg 
  Worst
  1. Maxwell.wireless.local                 0%  302  302     0    0    0 
      0
  2. 172.31.255.254                         0%  302  302     3    2    4 
     38
  3. 81.e0bccf.client.atlantech.net         0%  302  302     9    7    8 
     93
  4. main01-ss-vl3.ss.atlantech.net         0%  302  302     8    7   11 
    207
  5. core01-ss-fa0-1-0.ss.atlantech.net     0%  302  302     7    7   16 
    276
  6. edge01-ash-ge-0-1-0.ash.atlantech.n    0%  302  302     9    9   10 
     19
  7. ge-3-0-grtwaseq1.ri.telefonica-data    0%  302  302     9    9   16 
    208
  8. So7-1-3-0-grtparix1.ri.telefonica-d    0%  301  302    93   93   94 
    129
  9. So3-1-0-0-grtmadrr1.ri.telefonica-d    0%  301  301   113  112  114 
    194
10. tde-4-1-0-0-grtmadrr1.ri.telefonica    0%  301  301   113  112  116 
    268
11. 17.Red-80-58-74.pooles.rima-tde.net    0%  301  301   114  112  114 
    270
12. 77.Red-80-58-72.pooles.rima-tde.net    0%  301  301   127  125  126 
    201
13. ???
14. 218.Red-80-58-76.pooles.rima-tde.ne    0%  301  301   126  124  149 
    570
15. 75.Red-80-58-13.pooles.rima-tde.net    0%  301  301   137  133  143 
    587
16. 161.Red-217-127-2.pooles.rima-tde.n    1%  300  301   181  172  180 
    825





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