This page describes how NTP is setup and configured on the management network switches.
Our NTP servers will be the first 3 worker nodes. You can find these IPs from the CSI generated NMN.yaml file.
Get current NTP configuration.
sw-spine-001(config)# show run | include ntp
ntp server 10.252.1.7
ntp server 10.252.1.8
ntp server 10.252.1.9
ntp enable
Delete current NTP configuration.
sw-spine-001(config)# no ntp server 10.252.1.7
sw-spine-001(config)# no ntp server 10.252.1.8
sw-spine-001(config)# no ntp server 10.252.1.9
Add new NTP configuration.
sw-spine-001(config)# ntp enable
sw-spine-001(config)# ntp server 10.252.1.10
sw-spine-001(config)# ntp server 10.252.1.11
sw-spine-001(config)# ntp server 10.252.1.12
Verify NTP status.
sw-spine-001(config)# show ntp associations
----------------------------------------------------------------------
ID NAME REMOTE REF-ID ST LAST POLL REACH
----------------------------------------------------------------------
1 10.252.1.7 10.252.1.7 172.30.47.5 3 18 64 1
2 10.252.1.8 10.252.1.8 172.30.47.5 3 11 64 1
3 10.252.1.9 10.252.1.9 172.30.47.5 3 11 64 1
----------------------------------------------------------------------
Get current NTP configuration.
sw-leaf-001# show running-configuration | grep ntp
ntp server 10.252.1.12
ntp server 10.252.1.13
ntp server 10.252.1.14 prefer
Delete current NTP configuration.
sw-leaf-001# configure terminal
sw-leaf-001(config)# no ntp server 10.252.1.12
sw-leaf-001(config)# no ntp server 10.252.1.13
sw-leaf-001(config)# no ntp server 10.252.1.14
Add new NTP server configuration.
ntp server 10.252.1.10 prefer
ntp server 10.252.1.11
ntp server 10.252.1.12
ntp source vlan 2
Verify NTP status.
sw-leaf-001# show ntp associations
remote refid st t when poll reach delay offset jitter
==============================================================================
*10.252.1.12 10.252.1.4 4 u 52 64 3 0.420 -0.262 0.023
10.252.1.13 10.252.1.4 4 u 51 64 3 0.387 -0.225 0.043
10.252.1.14 10.252.1.4 4 u 48 64 3 0.399 -0.222 0.050
* master (synced), # master (unsynced), + selected, - candidate, ~ configured
Get current NTP configuration.
sw-spine-001 [standalone: master] (config) # show run | include ntp
no ntp server 10.252.1.9 disable
ntp server 10.252.1.9 keyID 0
no ntp server 10.252.1.9 trusted-enable
ntp server 10.252.1.9 version 4
no ntp server 10.252.1.10 disable
ntp server 10.252.1.10 keyID 0
no ntp server 10.252.1.10 trusted-enable
ntp server 10.252.1.10 version 4
no ntp server 10.252.1.11 disable
ntp server 10.252.1.11 keyID 0
no ntp server 10.252.1.11 trusted-enable
ntp server 10.252.1.11 version 4
Delete current NTP configuration.
sw-spine-001 [standalone: master] # conf t
sw-spine-001 [standalone: master] (config) # no ntp server 10.252.1.9
sw-spine-001 [standalone: master] (config) # no ntp server 10.252.1.10
sw-spine-001 [standalone: master] (config) # no ntp server 10.252.1.11
Add New NTP configuration.
sw-spine-001 [standalone: master] (config) # ntp server 10.252.1.12
sw-spine-001 [standalone: master] (config) # ntp server 10.252.1.13
sw-spine-001 [standalone: master] (config) # ntp server 10.252.1.14
Verify NTP configuration.
sw-spine-001 [standalone: master] # show ntp
NTP is administratively : enabled
NTP Authentication administratively: disabled
NTP server role : enabled
Clock is synchronized:
Reference: 10.252.1.14
Offset : -0.056 ms
Active servers and peers:
10.252.1.12:
Conf Type : serv
Status : candidat(+)
Stratum : 4
Offset(msec) : -0.119
Ref clock : 10.252.1.4
Poll Interval (sec): 128
Last Response (sec): 107
Auth state : none
10.252.1.13:
Conf Type : serv
Status : candidat(+)
Stratum : 4
Offset(msec) : -0.059
Ref clock : 10.252.1.4
Poll Interval (sec): 128
Last Response (sec): 96
Auth state : none
10.252.1.14:
Conf Type : serv
Status : sys.peer(*)
Stratum : 4
Offset(msec) : -0.056
Ref clock : 10.252.1.4
Poll Interval (sec): 128
Last Response (sec): 118
Auth state : none