Configuration NTP

Network Time Protocol 

 Introduction 

 Pour effectuer une synchronisation NTP, il faut tout d'abord que le switch puisse aller sur internet 

 -> ip interface "vlan1" address 192.168.10.100 mask 255.255.255.0 vlan 1 ifindex 1

-> ip static-route 0.0.0.0/0 gateway 192.168.10.1 metric 1 

 Passons à la configuration du NTP 

 -> ntp server 194.2.0.28 prefer

-> ntp server 38.229.59.9

-> ntp server enable

-> ntp server synchronised 

 Configuration de la timezone 

 -> system timezone CET

-> system daylight-savings-time start last sunday in march at 02:00 end last sunday in october at 03:00

-> system daylight-savings-time enable 

 Vérification 

 -> show ntp server status

IP address = 38.229.59.9,

Host mode = client,

Peer mode = server,

Prefer = yes,

Version = 4,

Key = 0,

Stratum = 2,

Minpoll = 6 (64 seconds),

Maxpoll = 10 (1024 seconds),

Delay = 0.167 seconds,

Offset = 660733522.277 seconds,

Dispersion = 0.953 seconds

Root distance = 0.083,

Precision = -20,

Reference IP = 172.16.21.35,

Status = configured : reachable : rejected,

Uptime count = 1402 seconds,

Reachability = f,

Unreachable count = 0,

Stats reset count = 1043 seconds,

Packets sent = 6,

Packets received = 4,

Duplicate packets = 0,

Bogus origin = 0,

Bad authentication = 0,

Bad dispersion = 0,

Last Event = peer changed to reachable,

IP address = 194.2.0.28,

Host mode = client,

Peer mode = server,

Prefer = no,

Version = 4,

Key = 0,

Stratum = 2,

Minpoll = 6 (64 seconds),

Maxpoll = 10 (1024 seconds),

Delay = 0.017 seconds,

Offset = 660733522.272 seconds,

Dispersion = 1.952 seconds

Root distance = 0.000,

Precision = -23,

Reference IP = 172.19.123.3,

Status = configured : reachable : rejected,

Uptime count = 1402 seconds,

Reachability = 7,

Unreachable count = 0,

Stats reset count = 1261 seconds,

Packets sent = 3,

Packets received = 3,

Duplicate packets = 0,

Bogus origin = 0,

Bad authentication = 0,

Bad dispersion = 0,

Last Event = peer changed to reachable, 

 et  

 -> show ntp client

Current time: Wed, Dec 8 2021 9:47:58.667 (UTC),

Last NTP update: Wed, Dec 8 2021 9:47:28.033 (UTC),

Server reference: 38.229.59.9,

Client mode: enabled,

Broadcast client mode: disabled,

Broadcast delay (microseconds): 4000,

Server qualification: synchronized 

 Il est aussi possible de régler l'heure et la date à la main 

 -> system date 08/12/2021

-> system time 10:48:00 

 Supprimer un serveur NTP : 

 -> no ntp server 194.2.0.28 prefer