Hi,
I'm trying to synchronize Cisco 2960's switches to an internal NTP server, but I have the ntp status 'clock unsynchronized' and ntp associations 'master, sane, valid'. After a while the ntp associations change to 'insane, invalid, stratum 4'. SW is running Version 15.2(6)E .
The corporate have different locations, the local NTP server (192.168.15.15) depends from HQ 192.168.7.15.
This network don't use L3 Switches as a main core on this location, only L2.
Any suggestions would be appreciated. Thank you!
................
Here are the current NTP configuration and status.
SW#sh run | b ntp
ntp update-calendar
ntp server 192.168.15.15
SW#sh ntp status
Clock is unsynchronized, stratum 5, reference is 192.168.15.15
nominal freq is 286.1023 Hz, actual freq is 286.1023 Hz, precision is 2**19
ntp uptime is 72700 (1/100 of seconds), resolution is 3496
reference time is E8AB2C10.1420546F (11:27:28.078 PDT Tue Sep 12 2023)
clock offset is 34.8297 msec, root delay is 92.05 msec
root dispersion is 175.21 msec, peer dispersion is 0.96 msec
loopfilter state is 'FREQ' (Drift being measured), drift is 0.000000000 s/s
system poll interval is 64, last update was 48 sec ago.
SW#sh ntp associations detail
192.168.15.15 configured, ipv4, our_master, sane, valid, stratum 4
ref ID 192.168.7.15 , time E8AB28DF.7A5A6EE1 (11:13:51.477 PDT Tue Sep 12 2023)
our mode client, peer mode server, our poll intvl 64, peer poll intvl 64
root delay 89.06 msec, root disp 124.52, reach 377, sync dist 188.01
delay 2.77 msec, offset 41.9905 msec, dispersion 0.98, jitter 15.69 msec
precision 2**23, version 4
assoc id 60545, assoc name 172.27.10.10
assoc in packets 20, assoc out packets 20, assoc error packets 0
org time 00000000.00000000 (16:00:00.000 PDT Wed Dec 31 1899)
rec time E8AB2C99.1E7361F7 (11:29:45.118 PDT Tue Sep 12 2023)
xmt time E8AB2C99.1E7361F7 (11:29:45.118 PDT Tue Sep 12 2023)
filtdelay = 2.77 2.55 2.98 1.18 2.81 1.76 3.05 2.12
filtoffset = 41.99 38.72 34.82 32.10 27.76 24.73 20.58 17.38
filterror = 0.00 1.03 2.05 3.04 4.06 5.05 6.06 7.06
minpoll = 6, maxpoll = 10
SW#sh ntp associations detail
192.168.15.15 configured, ipv4, insane, invalid, stratum 4
ref ID 192.168.7.15 , time E8AB2CDF.7E10E52A (11:30:55.492 PDT Tue Sep 12 2023)
our mode client, peer mode server, our poll intvl 64, peer poll intvl 64
root delay 87.28 msec, root disp 95.44, reach 1, sync dist 8078.75
delay 1.92 msec, offset 40.2234 msec, dispersion 7937.50, jitter 0.00 msec
precision 2**23, version 4
assoc id 60545, assoc name 172.27.10.10
assoc in packets 31, assoc out packets 31, assoc error packets 0
org time 00000000.00000000 (16:00:00.000 PDT Wed Dec 31 1899)
rec time E8AB2EB2.2600CE5C (11:38:42.148 PDT Tue Sep 12 2023)
xmt time E8AB2EB2.2600CE5C (11:38:42.148 PDT Tue Sep 12 2023)
filtdelay = 1.92 0.00 0.00 0.00 0.00 0.00 0.00 0.00
filtoffset = 40.22 0.00 0.00 0.00 0.00 0.00 0.00 0.00
filterror = 0.00 16000.0 16000.0 16000.0 16000.0 16000.0 16000.0 16000.0
minpoll = 6, maxpoll = 10
