Hello,
I am a bit confused using NTP over IPv6. This lesson and the Cisco documentation, states that NTPv4 adds this capability. However, in my lab i was able to use it with NTPv3.
R2#sh run | s ntp
ntp server 2A12::1 version 3
R2#sh ntp associations
address ref clock st when poll reach delay offset disp
*~2A12::1 127.127.1.1 3 9 128 377 3.950 -10.232 2.610
* sys.peer, # selected, + candidate, - outlyer, x falseticker, ~ configured
R2#sh ntp associations detail
2A12::1 configured, ipv6, our_master, sane, valid, stratum 3
ref ID 127.127.1.1 , time E62F2054.468B1A4C (07:35:48.275 UTC Wed May 18 2022)
our mode client, peer mode server, our poll intvl 128, peer poll intvl 128
root delay 0.00 msec, root disp 0.39, reach 377, sync dist 26.36
delay 3.95 msec, offset -10.2324 msec, dispersion 4.89, jitter 17.47 msec
precision 2**18, version 3
assoc id 35834, assoc name 2A12::1
assoc in packets 49, assoc out packets 49, assoc error packets 0
org time 00000000.00000000 (00:00:00.000 UTC Mon Jan 1 1900)
rec time E62F2060.478E3275 (07:36:00.279 UTC Wed May 18 2022)
xmt time E62F2060.478E3275 (07:36:00.279 UTC Wed May 18 2022)
filtdelay = 14.85 27.25 16.03 23.64 15.97 39.84 3.95 12.36
filtoffset = 1.99 -7.86 0.96 6.20 -15.63 12.93 -10.23 -42.18
filterror = 0.00 0.03 1.97 2.00 4.02 4.05 6.03 6.06
minpoll = 6, maxpoll = 10
And also confirmed from a packet capture
Apparently IPv6 can be used with NTPv3. Am i missing something here?