Ntpdate Error Strata Too High
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Ntpdate Ignore Stratum
posting ads with us Server Fault Questions Tags Users Badges Unanswered Ask Question _ Server Fault is a question and server dropped: leap not in sync answer site for system and network administrators. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up ntp server set stratum and rise to the top ntpdate -d Server dropped Strata too high up vote 9 down vote favorite 3 I cannot sync with a NTP source thats coming from an internal router/firewall. Anyone help ? ntppdate -d 192.168.92.82 6 Jun 11:57:30 ntpdate[5011]: ntpdate 4.1.2@1.892 Tue Feb 24 06:32:26 EST 2004 (1) transmit(192.168.92.82) receive(192.168.92.82) transmit(192.168.92.82) receive(192.168.92.82) transmit(192.168.92.82) receive(192.168.92.82) transmit(192.168.92.82) receive(192.168.92.82) transmit(192.168.92.82) 192.168.92.82: Server dropped: strata too high server 192.168.92.82,
Server Dropped: No Data
port 123 stratum 16, precision -19, leap 11, trust 000 refid [73.78.73.84], delay 0.02591, dispersion 0.00002 transmitted 4, in filter 4 reference time: 00000000.00000000 Thu, Feb 7 2036 6:28:16.000 originate timestamp: d1972e03.0ae02645 Mon, Jun 6 2011 11:44:19.042 transmit timestamp: d197311b.0ffac1d2 Mon, Jun 6 2011 11:57:31.062 filter delay: 0.02609 0.02591 0.02594 0.02596 0.00000 0.00000 0.00000 0.00000 filter offset: -792.020 -792.020 -792.020 -792.020 0.000000 0.000000 0.000000 0.000000 delay 0.02591, dispersion 0.00002 offset -792.020152 6 Jun 11:57:31 ntpdate[5011]: no server suitable for synchronization found Edit The server I'm being asked to sync to is a firewall , and I've now been told that it is not syncing with anything. So I suppose I need to know if I can force my server to sync with a server that is stratum 16 i.e not sync'd. Is that possible ? linux ntp share|improve this question edited Jun 6 '11 at 13:40 asked Jun 6 '11 at 10:47 AndyM 3802817 What server is the firewall syncing to? –ianc1215 Jun 6 '11 at 11:32 add a comment| 5 Answers 5 active oldest votes up vote 7 down vote accepted NTP increases the stratum for each level in the hierarchy - a NTP server pulling time from a "stratum
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Ntpdate Stratum 16
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192.168.254.x. I've assigned the machine with address 192.168.254.200 to be the NTP server. NTPD is installed and starts fine, but if I ask another machine to sync with it using ntpdate I get: no servers suitable for synchronisation. This happens on both http://www.tuxradar.com/answers/547 my Linux servers and on my Mac, so the problem appears to be in the config of the NTP server rather than the clients. I've also got some Cisco IP phones that use Simple NTP rather than full NTP and http://daemonforums.org/showthread.php?t=955 they pick the time up from the server no problem. NTP configuration seems to be very poorly documented. The ntp.conf file on the server contains the following (and I just want machines on the network to be able to ntp server get the time): restrict 192.168.254.0 mask 255.255.255.0 nomodify notra As I understand it, that will allow any machine with an IP in the range 192.168.254.x to get the time off the server for itself but not to modify the time on the server. I also tried setting the stratum level, but to no avail.
A The first step to diagnosing this is to run ntpdate with the -d (debug) argument. This causes ntpdate to show details of the communication ntpdate error strata with the server, but not alter the system clock. I suspect you'll see something like 192.168.254.200: Server dropped: strata too high This is usually caused by the server being too far out of sync with the upstream servers, so it sets an artificially high stratum value to prevent other computers trusting it. In effect, the server is saying, "Here's the time, but I'm not that sure of it", to which the client responds, "OK, I'll leave it, thanks" This probably also accounts for the more simple clients accepting its time. Leave the server running for a few hours to allow it to bring itself into sync with the upstream servers from pool.ntp.org or wherever you've set in ntp.conf. Running ntpq -p 192.168.254.200 will give some useful information, reporting the peers known to the server and their accuracy. You want most of them to have a * or + in the first column and a low value in the st (stratum) column for them to be considered authoritative. The stratum setting in ntpd.conf can only be used to increase the stratum level, which won't help here. You're right about the NTP documentation. It's written by those with thorough knowledge of the subject, which is good, but assumes a similar level of understanding among readers, which is not. Related solutionsFixing slow Linux serversCron jobs to back up serversFedora GRUB problem after installationOld distro, old problemSUSE LCD monitor probShow Threads Show Posts Tag Search Advanced Search Go to Page... Thread Tools Display Modes #1 (View Single Post) 17th June 2008 map7 Fdisk Soldier Join Date: Jun 2008 Posts: 75 ntpd strata too high error I've got an in house time server running ntpd and I know it's working as my phones update their time off my server. I'm running in to trouble when I try and update my workstation (running freebsd 7.0) to automatically update it's time from the server. I type the following (192.168.200.1 is my time server): # ntpdate -u -d 192.168.200.1 and I get this error: Code: 16 Jun 16:25:41 ntpdate[30021]: ntpdate 4.2.4p4@1.1520-o Sun Mar 30 23:05:01 UTC 2008 (1) Looking for host 192.168.200.1 and service ntp host found : gw.lan transmit(192.168.200.1) receive(192.168.200.1) transmit(192.168.200.1) receive(192.168.200.1) transmit(192.168.200.1) receive(192.168.200.1) transmit(192.168.200.1) receive(192.168.200.1) transmit(192.168.200.1) 192.168.200.1: Server dropped: strata too high server 192.168.200.1, port 123 stratum 16, precision -31, leap 11, trust 000 refid [192.168.200.1], delay 0.02576, dispersion 0.00000 transmitted 4, in filter 4 reference time: 00000000.00000000 Thu, Feb 7 2036 17:28:16.000 originate timestamp: cc008551.a6656c92 Mon, Jun 16 2008 16:23:13.649 transmit timestamp: cc0085e6.0c16dd26 Mon, Jun 16 2008 16:25:42.047 filter delay: 0.02591 0.02576 0.02579 0.02579 0.00000 0.00000 0.00000 0.00000 filter offset: -148.397 -148.397 -148.397 -148.397 0.000000 0.000000 0.000000 0.000000 delay 0.02576, dispersion 0.00000 offset -148.397329 16 Jun 16:25:42 ntpdate[30021]: no server suitable for synchronization found I can reach that computer with ping and ssh to it. There is no firewall between my computer and that server which is blocking this service. What am I missing? map7 View Public Profile Find all posts by map7 « Previous Thread | Next Thread » Thread Tools Show Printable Version Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your post