[ntp:questions] NTP Stratum

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Tue Feb 5 23:34:20 UTC 2013


BlackLists wrote:
> deepak khandelwal wrote:
> is floor or ceiling in TOS option, only applicable to many-cast ?
> No.
>> if i have only n (say 5) uni-cast servers specified in my
>>  ntp configuration file, how to specify tos field ?
> <http://www.eecis.udel.edu/~mills/ntp/html/miscopt.html>
> <http://www.eecis.udel.edu/~mills/ntp/html/select.html>
>> is orphan mode option also applicable to many-cast only ?
> No.
> tos cohort 1 orphan 8 ceiling 10
>
> A more complete example might be something like:
> #  Start ntpd with -g, the -g will prevent a panic stop if the time needs to be steped when started
> # ntp.conf for ALL (Clients and/or Servers)
> tos cohort 1 orphan 8 ceiling 10
> restrict default limited kod nomodify notrap
> restrict 127.0.0.1
> restrict source nomodify
> keys "/etc/ntp.keys" # e.g. contains: 123 M LAN_MD5_KEY , 321 M Corp_MD5_KEY , ...
> trustedkey 123 321
> manycastserver  224.0.1.1
> manycastclient  224.0.1.1 key 123 preempt
> multicastclient 224.0.1.1 key 123 preempt
> broadcastclient
> server 192.168.1.10 iburst key 123                   # LAN servers
> server 172.16.6.20 iburst key 123
> server 10.68.19.30 iburst                            # If you address the server by name append preempt
> server tick.corp.example.com key 321 iburst preempt  # Corporate servers
> server tock.example.net iburst preempt               # Other servers with permission, following access restrictions
> server ntp1.vrlsoftwaresolutions.in iburst preempt   # <http://www.vrlsolutions.com/>
> server time.example.net iburst preempt               # <http://support.ntp.org/bin/view/Servers/RulesOfEngagement>
> pool 0.vendor.iburst preempt                         # <http://www.pool.ntp.org/vendors.html> (Your vendor zone, OS vendor, ...)

Pasto, that hardware / software / application
 vendor zone pool example should be more like:

pool 0.vendor.pool.ntp.org iburst preempt              # <http://www.pool.ntp.org/vendors.html>


> pool in.pool.ntp.org preempt                         # <http://www.pool.ntp.org/zone/@> Regional zones
> pool asia.pool.ntp.org preempt


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