Joseph Gwinn wrote: > I have been debugging some system problems. The main system is too > complicated, with too many people doing too many things, so I sought > quiet refuge in an isolated test system consisting of a NTP timeserver > connected by a point-to-point ethernet cable to a computer running NTP, > which generates peerstats and loopstats data. This test system is > air-gap isolated from the rest of everything. Only one timeserver is > available to a given computer at a time. > > The timeserver can be either a Symmetricom ET6010 GPS receiver feeding > an IRIG-B002 time signal to a Symmetricom TS2100 Network Time Server, or > a Spectracom 9383 NTP timeserver with built-in GPS receiver. The GPS > receivers are driven from a common antenna via a splitter. > > The computer can be a Sun Ultra 10 or a Sun Ultra 60, in both cases > running Solaris 9. Solid boxes, but old. The OS version reply is SunOS > 5.9 Generic May 2002. This was clean installed from CD a week ago, so > has not had time to collect too many barnicles. > > NTP version 3 is running. I've been trying to find the command to give > me the full version, including dot (like 3.4y), and I get answers, but > don't know which one to believe, and if the version given is that of the > NTP daemon itself, or of ntpq, or of ntpdate. > > The full grid of four tests, being two timeservers by two computers, has > been run. Many odd things are seen, but the question for today is about > status codes in peerstats file records. > > Most of the replies that NTP is using to update the time have a status > code of 9514, which translates to the following: > > Configured, reachability OK; Current sync source - max distance > exceeded; Count is 1; Peer now reachable. > > The part that has me most perplexed is the "max distance exceeded" part, > as this is a direct wired connection, with zero hops, zero delay, and no > interfering traffic. Obviously, they are not talking about physical > distance or hops or the like, so the "distance" has to have units of > time. > I think that, perhaps, "maximum distance" refers to "synchronization distance" q.v. Once upon a time, I knew the definition but my memory has failed me.
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