Notes On The Ntp Server Referring To The Local Clock - Fujitsu SPARC Enterprise M4000 Product Notes

Notes on the NTP Server Referring to the Local Clock

When the NTP server which XSCF refers to is referring to the server's own system
time (local clock), and when the address of "127.127.1.0" is set to that local clock,
time synchronization in XSCF might fail.
The address of the XSCF's own local clock is fixed to "127.127.1.0." On the other
hand, when the address of the local clock of the NTP server which XSCF refers to
is set to "127.127.1.0," the address of the clock source (refid) has the same value as
the address of the XSCF's own local clock. An NTP server like this is excluded
from the target of XSCF time synchronization.
You can execute the showntp -l command to refer to the address of the NTP
server's own clock source which is set in XSCF and the address of the XSCF's own
local clock.
XSCF> showntp -l
remote refid st t when poll reach delay offset jitter
==============================================================================
192.168.1.2 LOCAL(0) 3 u 10 1024 377 0.000 0.000 0.000
*127.127.1.0 .LOCL. 5 l 28 64 377 0.000 0.000 0.008
Of the two NTP server outputs, the upper (192.168.1.2) indicates the NTP server
which is set by using the setntp(8) command. The refid is LOCAL(0), which
means that the local clock which has the address of "127.127.1.0" is set to the clock
source of this NTP server. On the other hand, the lower indicates the XSCF's own
local clock. The address of the XSCF's own local clock is fixed to "127.127.1.0."
Due to this, the NTP server (192.168.1.2) is excluded from the target of XSCF time
synchronization; which results in the XSCF synchronizes with its own local clock.
With any of the following measures to avoid the trouble, time can be correctly
synchronized with the NTP server which is set by using the setntp(8) command.
●
Change the clock source that the NTP server being set in XSCF refers to
Use the showntp -l command and check the clock source of the NTP server which
is set in XSCF. An NTP server which indicates the refid of LOCAL(0) in the output is
referring to the local clock which has the address of "127.127.1.0," and you should
change it to refer to another clock source.
When you change the clock source of an NTP server, make sure in advance that it
has no impact on other NTP clients.
●
Change the address of the local clock of the NTP server
Of the NTP server which XSCF refers to, change the address of the local clock to
"127.127.1.1," "127.127.1.2," or "127.127.1.3." Change /etc/inet/ntp.conf of
Solaris OS. To enable the change, restart of the NTP daemon is required.
When you change the address of the local clock of an NTP server, make sure in
advance that it has no impact on other NTP clients.
General Information About XCP 1091 9