日頃は ntpq -p とかで済ませてますが、インタラクティブモードに入ってデバッグレベルを上げるとトラブルシュートに役に立つこともあるかも?
オプションを付けずに ntpq します。
# ntpq ntpq>
? でコマンド一覧が出ますね。
ntpq> ? ntpq commands: :config drefid mreadlist readvar addvars exit mreadvar reslist apeers help mrl rl associations host mrulist rmvars authenticate hostnames mrv rv authinfo ifstats ntpversion saveconfig cl iostats opeers showvars clearvars kerninfo passociations sysinfo clocklist keyid passwd sysstats clockvar keytype peers timeout config-from-file lassociations poll timerstats cooked lopeers pstats version cv lpassociations quit writelist debug lpeers raw writevar delay monstats readlist
? <コマンド> でヘルプが出るみたいです。
ntpq> ? debug function: set/change debugging level usage: debug [ no|more|less ]
peers を投げると ntpq -p と同じ出力が得られるみたいです。
ntpq> peers
remote refid st t when poll reach delay offset jitter
==============================================================================
*ntp-a3.nict.go. .NICT. 1 u 88 128 377 8.454 0.079 0.879
+ntp2.jst.mfeed. 133.243.236.17 2 u 42 128 377 10.440 -1.667 0.741
+133.40.41.136 133.40.41.133 2 u 22 128 377 20.110 -1.020 0.656
debug more で1段階ずつ上がり、degug less で1段階ずつ下がるみたいです。
ntpq> debug more
debug level set to 1
ntpq> peers
1 packets reassembled into response
[45029] [45028] [45027]
3 associations total
::1 reversed to localhost
remote refid st t when poll reach delay offset jitter
==============================================================================
2 packets reassembled into response
133.243.238.244 reversed to ntp-a3.nict.go.jp
*ntp-a3.nict.go. .NICT. 1 u 4 128 377 8.454 0.079 0.959
2 packets reassembled into response
210.173.160.57 reversed to ntp2.jst.mfeed.ad.jp
+ntp2.jst.mfeed. 133.243.236.17 2 u 89 128 377 10.440 -1.667 0.741
2 packets reassembled into response
+133.40.41.136 133.40.41.133 2 u 69 128 377 20.110 -1.020 0.656
もう1段あげる。
ntpq> debug more
debug level set to 2
ntpq> peers
Got packet, size = 24
Packet okay
1 packets reassembled into response
[45029] [45028] [45027]
3 associations total
::1 reversed to localhost
remote refid st t when poll reach delay offset jitter
==============================================================================
Got packet, size = 480
Packet okay
Got packet, size = 80
Packet okay
2 packets reassembled into response
133.243.238.244 reversed to ntp-a3.nict.go.jp
*ntp-a3.nict.go. .NICT. 1 u 39 128 377 8.454 0.079 0.959
Got packet, size = 480
Packet okay
Got packet, size = 104
Packet okay
2 packets reassembled into response
210.173.160.57 reversed to ntp2.jst.mfeed.ad.jp
+ntp2.jst.mfeed. 133.243.236.17 2 u 124 128 377 10.440 -1.667 0.741
Got packet, size = 480
Packet okay
Got packet, size = 100
Packet okay
2 packets reassembled into response
+133.40.41.136 133.40.41.133 2 u 104 128 377 20.110 -1.020 0.656
おもしろいのでもっとデバッグレベルを上げてみますｗ
tpq> debug more
debug level set to 3
ntpq> debug more
debug level set to 4
ntpq> debug more
debug level set to 5
ntpq> peers
Sending 12 octets
Request packet:
16 01 00 0d 00 00 00 00 00 00 00 00 ............
Response packet:
16 81 00 0d 06 15 00 00 00 00 00 0c af e5 94 24 ...............$
af e4 94 24 af e3 96 4d ...$...M
Got packet, size = 24
Packet okay
1 packets reassembled into response
[45029] [45028] [45027]
3 associations total
::1 reversed to localhost
remote refid st t when poll reach delay offset jitter
==============================================================================
Sending 12 octets
Request packet:
16 02 00 0e 00 00 af e3 00 00 00 00 ............
Response packet:
16 a2 00 0e 96 4d af e3 00 00 01 d4 73 72 63 61 .....M......srca
64 72 3d 31 33 33 2e 32 34 33 2e 32 33 38 2e 32 dr=133.243.238.2
34 34 2c 20 73 72 63 70 6f 72 74 3d 31 32 33 2c 44, srcport=123,
20 64 73 74 61 64 72 3d 31 37 32 2e 32 32 2e 31 dstadr=172.22.1
36 2e 38 2c 20 64 73 74 70 6f 72 74 3d 31 32 33 6.8, dstport=123
2c 0d 0a 6c 65 61 70 3d 30 2c 20 73 74 72 61 74 ,..leap=0, strat
75 6d 3d 31 2c 20 70 72 65 63 69 73 69 6f 6e 3d um=1, precision=
2d 32 30 2c 20 72 6f 6f 74 64 65 6c 61 79 3d 30 -20, rootdelay=0
2e 30 30 30 2c 20 72 6f 6f 74 64 69 73 70 3d 30 .000, rootdisp=0
2e 30 30 30 2c 0d 0a 72 65 66 69 64 3d 4e 49 43 .000,..refid=NIC
54 2c 20 72 65 66 74 69 6d 65 3d 30 78 64 63 39 T, reftime=0xdc9
32 65 33 35 33 2e 30 30 30 30 30 30 30 30 2c 20 2e353.00000000,
72 65 63 3d 30 78 64 63 39 32 65 33 35 33 2e 62 rec=0xdc92e353.b
39 61 36 61 33 34 33 2c 0d 0a 72 65 61 63 68 3d 9a6a343,..reach=
30 78 66 66 2c 20 75 6e 72 65 61 63 68 3d 30 2c 0xff, unreach=0,
20 68 6d 6f 64 65 3d 33 2c 20 70 6d 6f 64 65 3d hmode=3, pmode=
34 2c 20 68 70 6f 6c 6c 3d 37 2c 20 70 70 6f 6c 4, hpoll=7, ppol
6c 3d 37 2c 20 68 65 61 64 77 61 79 3d 34 32 2c l=7, headway=42,
0d 0a 66 6c 61 73 68 3d 30 78 30 2c 20 6b 65 79 ..flash=0x0, key
69 64 3d 30 2c 20 6f 66 66 73 65 74 3d 30 2e 31 id=0, offset=0.1
39 36 2c 20 64 65 6c 61 79 3d 38 2e 32 35 37 2c 96, delay=8.257,
20 64 69 73 70 65 72 73 69 6f 6e 3d 33 2e 34 39 dispersion=3.49
34 2c 0d 0a 6a 69 74 74 65 72 3d 30 2e 38 32 32 4,..jitter=0.822
2c 20 78 6c 65 61 76 65 3d 30 2e 30 32 35 2c 0d , xleave=0.025,.
0a 66 69 6c 74 64 65 6c 61 79 3d 20 38 2e 32 36 .filtdelay= 8.26
20 31 30 2e 34 36 20 38 2e 34 35 20 31 30 2e 37 10.46 8.45 10.7
31 20 38 2e 39 30 20 31 30 2e 31 35 20 31 30 2e 1 8.90 10.15 10.
33 34 20 38 2e 39 30 2c 0d 0a 66 69 6c 74 6f 66 34 8.90,..filtof
66 73 65 74 3d 20 30 2e 32 30 20 31 2e 31 36 20 fset= 0.20 1.16
30 2e 30 38 20 31 2e 33 30 20 30 2e 34 34 20 31 0.08 1.30 0.44 1
Got packet, size = 480
Packet okay
Response packet:
16 82 00 0e 96 4d af e3 01 d4 00 45 2e 32 39 20 .....M.....E.29
31 2e 31 36 20 30 2e 38 31 2c 0d 0a 66 69 6c 74 1.16 0.81,..filt
64 69 73 70 3d 20 30 2e 30 30 20 32 2e 30 33 20 disp= 0.00 2.03
33 2e 39 39 20 35 2e 39 37 20 37 2e 39 34 20 39 3.99 5.97 7.94 9
2e 38 39 20 31 30 2e 38 36 20 31 31 2e 38 35 0d .89 10.86 11.85.
0a 00 00 00 ....
Got packet, size = 84
Packet okay
2 packets reassembled into response
133.243.238.244 reversed to ntp-a3.nict.go.jp
*ntp-a3.nict.go. .NICT. 1 u 21 128 377 8.257 0.196 0.822
～以下略～
……やりすぎ注意。
exit も quit も通るみたいですね。
ntpq> quit #