[ntp:questions] Linux client ntp

Spoon devnull at localhost.com
Fri Apr 13 13:07:32 UTC 2007


Riccardo wrote:

> restrict default ignore
> restrict 127.0.0.1
> restrict server A
> restrict server B
> server A
> server B
> driftfile /var/lib/ntp/drift
> broadcastdelay  0.008
> 
> Can I delete "broadcastdelay" and restrict 127.0.0.1 ?

Did you read the documentation? What does it say?

$ grep -nr broadcastdelay ntp-4.2.4p0/html | cut -f-1
ntp-4.2.4p0/html/confopt.html:73:
ntp-4.2.4p0/html/miscopt.html:21:
ntp-4.2.4p0/html/ntpd.html:37:
ntp-4.2.4p0/html/ntpd.html:102:
ntp-4.2.4p0/html/ntpdc.html:108:

http://www.ee.udel.edu/~mills/ntp/html/miscopt.html

broadcastdelay seconds

     The broadcast and multicast modes require a special calibration to 
determine the network delay between the local and remote servers. 
Ordinarily, this is done automatically by the initial protocol exchanges 
between the client and server. In some cases, the calibration procedure 
may fail due to network or server access controls, for example. This 
command specifies the default delay to be used under these 
circumstances. Typically (for Ethernet), a number between 0.003 and 
0.007 seconds is appropriate. The default when this command is not used 
is 0.004 seconds.

http://www.ee.udel.edu/~mills/ntp/html/ntpd.html

-r broadcastdelay

     Specify the default propagation delay from the broadcast/multicast 
server to this client. This is necessary only if the delay cannot be 
computed automatically by the protocol.




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