Changing NTP Secondary Server During Switch Setup


From NetVisor OS version 6.0.0 and later release, you can undo or unset a configured NTP secondary server by using the switch-setup-modify command along with an empty string ("") as parameter.  You can use either single-quotes ('') or double-quotes ("") to indicate the empty string.


In NetVisor OS version 6.1.0, an additional third NTP server is introduced as part of the Common Criteria compliance process.


First, view the switch setup details using the command:


CLI (network-admin@switch) > switch-setup-show

switch-name:               switch

mgmt-ip:                   10.13.0.55/23

mgmt-ip-assignment:        static

mgmt-ip6:                  fe80::e6f0:4ff:fec9:dcbb/64

mgmt-ip6-assignment:       autoconf

mgmt-link-state:           up

mgmt-link-speed:           1g

in-band-ip:                192.168.66.3/24

in-band-ip6:               fe80::640e:94ff:fe69:5fd8/64

in-band-ip6-assign:        autoconf

gateway-ip:                10.13.0.1

dns-ip:                    10.135.2.13

dns-secondary-ip:          10.20.4.1

domain-name:               pluribusnetworks.com

ntp-server:                0.ubuntu.pool.ntp.org

ntp-secondary-server:      1.ubuntu.pool.ntp.org

timezone:                  America/Los_Angeles

date:                      2021-01-11,21:57:43

hostid:                    184558697

location-id:               2

enable-host-ports:         yes



To remove or unset the secondary NTP server, use the command with an empty string in single quotes or double quotes as below:


CLI (network-admin@switch) > switch-setup-modify ntp-secondary-server

Server ip or host-name / empty string to unset


CLI (network-admin@switch) > switch-setup-modify ntp-secondary-server ""

or 

CLI (network-admin@switch) > switch-setup-modify ntp-secondary-server ''


Additionally, from NetVisor OS version 6.1.0 onward, you can add a tertiary NTP server using the switch-setup-modify command:


CLI (network-admin@switch) > switch-setup-modify ntp-tertiary-server 3.ubuntu.pool.ntp.org


CLI (network-admin@switch) > switch-setup-show

switch-name:               switch

mgmt-ip:                   10.13.0.55/23

mgmt-ip-assignment:        static

mgmt-ip6:                  fe80::e6f0:4ff:fec9:dcbb/64

mgmt-ip6-assignment:       autoconf

mgmt-link-state:           up

mgmt-link-speed:           1g

in-band-ip:                192.168.66.3/24

in-band-ip6:               fe80::640e:94ff:fe69:5fd8/64

in-band-ip6-assign:        autoconf

gateway-ip:                10.13.0.1

dns-ip:                    10.135.2.13

dns-secondary-ip:          10.20.4.1

domain-name:               pluribusnetworks.com

ntp-server:                0.ubuntu.pool.ntp.org

ntp-secondary-server:      

ntp-tertiary-server:       3.ubuntu.pool.ntp.org

timezone:                  America/Los_Angeles

date:                      2021-01-11,21:57:43

hostid:                    184558697

location-id:               2

enable-host-ports:         yes


Note: NetVisor OS logs the changes such as the current time, new time, and the origin of the change into the audit log file.  For example:


CLI (network-admin@switch) > log-audit show 


audit  2021-01-11,21:57:31.077766-08:00 user_command 11001 info  network-admin 10.140.0.129 Command "switch-setup-modify ntp-tertiary-server 3.ubunt

u.pool.ntp.org" result success

audit  2021-01-11,22:00:35.036675-08:00 user_command 11001 info  network-admin 10.140.0.129 Command "switch-setup-modify ntp-tertiary-server 7.ubunt

u.pool.ntp.org" result failure: "Could not resolve NTP server's name/addr"

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