Time Syncronization - Revision history

A-lurker at 02:58, 15 June 2013

2013-06-15T02:58:17Z

George at 15:05, 10 May 2012

2012-05-10T15:05:16Z

Cj man: /* Instructions */

2012-05-10T13:45:02Z

‎Instructions

Cj man: /* Instructions */

2012-05-10T13:43:33Z

‎Instructions

Cj man at 13:41, 10 May 2012

2012-05-10T13:41:12Z

Cj man: /* Installing the NTP client */

2012-05-10T13:38:32Z

‎Installing the NTP client

Cj man: /* Installing the NTP client */

2012-05-08T16:45:49Z

‎Installing the NTP client

Cj man at 16:17, 8 May 2012

2012-05-08T16:17:56Z

Cj man at 16:17, 8 May 2012

2012-05-08T16:17:20Z

George at 15:58, 8 May 2012

2012-05-08T15:58:49Z

← Older revision		Revision as of 02:58, 15 June 2013
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		+	[[Category:How_To]]
	The '''Vera '''units use by default '''rdate '''to synchronize the time.<br> Rdate is a client program which uses the Time protocol and does one time query and synchronization. Rdate servers are running the Time service protocol on '''port 37''' which conforms to RFC 868. Clients can use either TCP or UDP.<br> The '''Time Protocol''' (RFC 858) is not related or compatible with '''Network Time Protocol''' (RFC 958) used by ntpclient/ntpd/openntp.<br>		The '''Vera '''units use by default '''rdate '''to synchronize the time.<br> Rdate is a client program which uses the Time protocol and does one time query and synchronization. Rdate servers are running the Time service protocol on '''port 37''' which conforms to RFC 868. Clients can use either TCP or UDP.<br> The '''Time Protocol''' (RFC 858) is not related or compatible with '''Network Time Protocol''' (RFC 958) used by ntpclient/ntpd/openntp.<br>

@@ Line 1: / Line 1: @@
-The '''Vera '''units use by default '''rdate '''to synchronize the time.<br>
+The '''Vera '''units use by default '''rdate '''to synchronize the time.<br> Rdate is a client program which uses the Time protocol and does one time query and synchronization. Rdate servers are running the Time service protocol on '''port 37''' which conforms to RFC 868. Clients can use either TCP or UDP.<br> The '''Time Protocol''' (RFC 858) is not related or compatible with '''Network Time Protocol''' (RFC 958) used by ntpclient/ntpd/openntp.<br>
 Rdate is a client program which uses the Time protocol and does one time query and synchronization. Rdate servers are running the Time service protocol on '''port 37''' which conforms to RFC 868. Clients can use either TCP or UDP.<br>
 The '''Time Protocol''' (RFC 858) is not related or compatible with '''Network Time Protocol''' (RFC 958) used by ntpclient/ntpd/openntp.<br>
 == <span id="Prerequisites" class="mw-headline">Prerequisites</span>  ==
@@ Line 55: / Line 54: @@
 <pre>while read server; do echo -n "Server $server&nbsp;:"; rdate -p $server &amp;&amp; echo "OK" || echo "FAILED"; done &lt; /tmp/timeservers.txt
 </pre>
-After that compare the results and pick the servers that only display OK, these will be the most reliable, and then add them to the list here /etc/config/timeserver .<br>
+After that compare the results and pick the servers that only display OK, these will be the most reliable, and then add them to the list here /etc/config/timeserver .<br> '''Note: Please remember to keep the same format of the file when you edit it.'''
 '''Note: Please remember to keep the same format of the file when you edit it.'''
 To sync the time use the following command&nbsp;:<br>
 <pre>ash -x /usr/bin/sync_time.sh
 </pre>
 <br>
 == Creating a local time server<br>  ==
@@ Line 73: / Line 71: @@
 Optionally you can install the ntpclient also. Run the following commands to install the NTP client by ssh:<br>
-<pre>opkg update</pre>
+<pre>opkg update</pre> <pre>opkg install ntpclient</pre>
-<pre>opkg install ntpclient</pre>
+The ntp servers are define in this file&nbsp;: /etc/config/ntpclient
-−
 The ntp servers are define in this file&nbsp;: /etc/config/ntpclient
 To edit the file you can use '''vim '''editor:
 <pre>vim /etc/config/ntpclient</pre>
 To view the current entries in it type:<br>
 <pre>cat /etc/config/ntpclient</pre>
 '''''Note: Please remember to keep the same format of the file when you edit it.'''''<br>
 '''''Note: Please remember to keep the same format of the file when you edit it.'''''<br>
 Check if Vera can connect to the default ntp servers&nbsp;: <br>
 <pre>BASE_NTP_SRV="openwrt.pool.ntp.org"; for i in 0 1 2 3 5; do NTP_SRV="$i.$BASE_NTP_SRV"; echo -n "$NTP_SRV&nbsp;: "; ntpclient -c 1 -p 123 -h $NTP_SRV || echo "FAILED"; done</pre>
 Force ntpclient to re-read the ntp servers and to do a time sync&nbsp;:
-Force ntpclient to re-read the ntp servers and to do a time sync&nbsp;: &lt;br&gt;
 <pre>/etc/init.d/ntpclient restart</pre>
 To check if the ntp client is running use this command&nbsp;: <br>

@@ Line 15: / Line 15: @@
 Gain ssh access to your Vera (root) and use the password that is provided on the bottom of your vera2. More info on how to can be found here:[http://wiki.micasaverde.com/index.php/Logon_Vera_SSH [1]]
-Time Servers are listening on port 37 and Network Time Servers on 123.<br> '''Note:''' In order for you Vera unit to successfully syncronize its time you have to allow connections from it to the time servers on port 37 for rdate and port 123 for ntpclient if you install it.<br>
+Time Servers are listening on port 37 and Network Time Servers on 123.<br> '''Note:''' In order for you Vera unit to successfully syncronize its time you have to allow connections from it to the time servers on '''port 37 for rdate''' and '''port 123 for ntpclient''' if you install it.<br>
 <u>Check if Vera can sync with a Time Server</u>&nbsp;:<br>

@@ Line 56: / Line 56: @@
 </pre>
 After that compare the results and pick the servers that only display OK, these will be the most reliable, and then add them to the list here /etc/config/timeserver .<br>
 To sync the time use the following command&nbsp;:<br>
 <pre>ash -x /usr/bin/sync_time.sh
 </pre>
 <br>
 == Creating a local time server<br>  ==

@@ Line 72: / Line 72: @@
 Optionally you can install the ntpclient also. Run the following commands to install the NTP client by ssh:<br>
-<pre>opkg update
+<pre>opkg update</pre>
-</pre> <pre>opkg install ntpclient
+<pre>opkg install ntpclient</pre>
-The ntp server are define in this file&nbsp;: /etc/config/ntpclient
+The ntp servers are define in this file&nbsp;: /etc/config/ntpclient
-To edit the file you can use the '''vim '''editor:
 To view the current entries in it type:<br>
-<pre>cat /etc/config/ntpclient
+<pre>cat /etc/config/ntpclient</pre>
 </pre>
-<br> '''''Note: Please remember to keep the same format of the file when you edit it.''''' Check if Vera can connect to the default ntp servers&nbsp;: <br>
+'''''Note: Please remember to keep the same format of the file when you edit it.'''''<br>
 Force ntpclient to re-read the ntp servers and to do a time sync&nbsp;: &lt;br&gt;
-</pre><pre>/etc/init.d/ntpclient restart
+<pre>/etc/init.d/ntpclient restart</pre>
 </pre>
 To check if the ntp client is running use this command&nbsp;: <br>
 <pre>ps fax | grep ntp</pre>
 If you see this message then you've successfully installed the NTP client:<br>
 <pre>4188 root      1068 S    /usr/sbin/ntpclient -i 600 -s -l -D -p 123 -h 0.openwrt.pool.ntp.org
-root      1672 S    grep ntp
+root      1672 S    grep ntp</pre>
 </pre>

@@ Line 1: / Line 1: @@
-The '''Vera '''units use by default '''rdate '''to synchronize the time. Rdate is a client program which uses the Time protocol. Rdate servers are running the Time service protocol on '''port 37''' which conforms to RFC 868. Clients can use either TCP or UDP. The '''Time Protocol''' is not related or compatible with '''Network Time Protocol''' (RFC 958). This service does one time query and synchronization.<br>
+The '''Vera '''units use by default '''rdate '''to synchronize the time.<br>
 == <span id="Prerequisites" class="mw-headline">Prerequisites</span>  ==
@@ Line 16: / Line 17: @@
 Time Servers are listening on port 37 and Network Time Servers on 123.<br> '''Note:''' In order for you Vera unit to successfully syncronize its time you have to allow connections from it to the time servers on port 37 for rdate and port 123 for ntpclient if you install it.<br>
-<u>To check the servers used to synchronize time use</u>&nbsp;:<br>
+<u>Check if Vera can sync with a Time Server</u>&nbsp;:<br>
 <pre>rdate -p server</pre>
-''The -p switch prints the date and time''.<br>
+''The -p switch prints the date and time from the server''.<br>
-<u>To set the time from that server use this command:</u>
+<u>Set the time from a Time Server:</u>
 <pre>rdate -l -s server</pre>
 ''The -l switch allows for logging results to Syslog, -s sets the system time.''

@@ Line 3: / Line 3: @@
 Rdate uses the Time Protocol (RFC858) '''which is not compatibile with ntpclinet/openntp''' Network Time Protocol (RFC958).
-== <span class="mw-headline" id="Prerequisites">Prerequisites</span>  ==
+== <span id="Prerequisites" class="mw-headline">Prerequisites</span>  ==
 *Vera hardware
@@ Line 10: / Line 10: @@
 <br>
-== <span class="mw-headline" id="Instructions">Instructions</span>  ==
+== <span id="Instructions" class="mw-headline">Instructions</span>  ==
 Gain ssh access to your Vera (root) and use the password that is provided on the bottom of your vera2. More info on how to can be found here:[http://wiki.micasaverde.com/index.php/Logon_Vera_SSH [1]]
@@ Line 78: / Line 78: @@
 To check if the ntp client is running use this command:<br>
 <pre>ps fax | grep ntp</pre>
-If you see this message than you've successfully installed the NTP client:<br>
+If you see this message then you've successfully installed the NTP client:<br>
 <pre>4188 root      1068 S    /usr/sbin/ntpclient -i 600 -s -l -D -p 123 -h 0.openwrt.pool.ntp.org
 root      1672 S    grep ntp