[ntp:questions] orphan mode
Frank Alsop
fealsop at yahoo.com
Wed Jun 1 18:42:02 UTC 2011
Hi,
I am still confused about the proper use of the "tos orphan #" statement.
Thanks for the replies to my last question and I have read the relevant docs at
ntp.org. I am pretty confident that I understand how to choose an appropriate
orphan stratum. However, I am not 100%, and I have been unable to convince the
others in my group. As a response to a previous question of mine, I was told
that 5 is the default minimum and to set the tos orphan stratum to be greater
than or equal to 5. In our ntp.conf, in our stratum 2 hosts, we have "tos
orphan 4". The others in my group are not convinced this is a mistake, even
with the recommendation to use a minimum of 5. Our system has a GPS at stratum
1, 4 "peers" at stratum 2, a mix of clients and servers at stratum 3, with the
highest client at stratum 5. So, I think we should set "tos orphan 5" to adhere
to: "A host is enabled for orphan mode using the tos orphan stratum command,
where stratum is some stratum less than 16 and greater than any anticipated
stratum that might occur with configured Internet time servers". I am assuming
that the server at stratum 4 in our system is a "configured internet time
server". Others in my group think that only the lowest stratum, which is our
stratum 2 peer group, should be considered "configured internet time servers".
Therefore, they think 4 is greater than that and we are ok.
So, what is the negative impact (if any) of having a "tos orphan 4" statement
in our setup as described above? If we had an additional server at stratum 5
with a client at stratum 6, would we then need to set "tos orphan 6", etc.?
thanks,
Frank
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