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NTP client on Ubuntu

NTP child service

UDP/123

TCP/123

already exist with!!! _ management_ntp_v4_2 !!! 

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Pre-requisite
DNS server ( static or dynamic ) 
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Router > System Settings

FQDN 

( but the IP address can not change all the time, typical case behind a load balancer )


Google NTP server: time[1.to 4] google.com    example time1.google.com


Use IP@ not FQDN

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85.199.214.102  ( UK, London )
85.199.214.98   ( UK, London )
130.149.17.21   ( DE, Berlin )
79.135.97.79    ( UK , Portsmooth )

( google NTP:  time1.google.com to time4.google.com )

NTP IP address information

https://www.infobyip.com/ip-85.199.214.102.html

Google NTP server

216.239.35.0

216.239.35.4

216.239.35.8

216.239.35.12

time.google.com ( time1.google.com, time2.google.com, time3.google.com and time4.google.com )



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From the conductor

show ntp router SSR-top node node1

show ntp router SSR-top node node2


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from the SSR shell

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 NTP server IP addresshttps://timetoolsltd.com/information/public-ntp-server/uk/
NTP server poolhttps://www.pool.ntp.org/zone/uk
show ntp

show ntp

Code Block
titleshow ntp
*jkriker@node1.jnpr-cond# show ntp
Tue 2021-09-28 09:13:40 UTC
✔ Retrieving NTP information...

================= ================== ======== ================ ========= ====== ====== ====== ======= ========= ======== ======== ============
 Node              Time Source        Status   Ref. ID          Stratum   Type   When   Poll   Reach     Delay   Offset   Jitter   Tally Code
================= ================== ======== ================ ========= ====== ====== ====== ======= ========= ======== ======== ============
 node1.jnpr-cond   +time.shf.uk.as4   active   85.199.214.98          2   u       952   1024     377     7.133    0.237    0.409   candidate
 node1.jnpr-cond   -ns4.turbodns.co   active   94.130.184.193         3   u       727   1024     377     7.821    2.663    0.398   outlyer
 node1.jnpr-cond   +dadns.cdnetwork   active   216.239.35.12          2   u       502   1024     377   219.698    0.502    1.485   candidate
 node1.jnpr-cond   *ntp2.glypnod.co   active   193.62.22.74           2   u       502   1024     377     2.218   -0.802    0.245   syspeer


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Configuration



show config running authority router SSR-top system ntp


Code Block
titlentp server
admin@node1.
jlk-test-branch2#
conductor# show config running authority router
jlk
SSR-
test-branch2
top system ntp

config

    authority

        router
jlk
SSR-
test-branch2
top
            name
jlk
SSR-
test-branch2
top

            system

                ntp

                    server
85.199.214.102
216.239.35.0
                        ip-address  216.239.35.0
                    exit

                    server  216.239.35.4
                        ip-address
85
216.
199
239.
214
35.
102
4
                    exit

                    server
85
216.
199
239.
214
35.
98
8
                        ip-address
85
216.
199
239.
214
35.
98
8
                    exit

                    server
79
216.
135
239.
97
35.
79
12
                        ip-address
79
216.
135
239.
97
35.
79
12
                    exit
                exit
            exit
        exit
    exit
exit