# Paramètrer la centralisation des données sur l'horaire (service NTP) depuis le router vers les autres périphériques réseaux (routeur - switchs)

## Bilan des commandes SANS Internet

### Routeur

<div id="bkmrk-enable-clock-set-hh%3A"><div class="cm-editor ͼ1 ͼ2 ͼ4 ͼ1p"><div aria-live="polite" style="position: fixed; top: -10000px;">  
</div><div class="cm-scroller" tabindex="-1"><div aria-hidden="true" class="cm-gutters" style="min-height: 142.4px; position: sticky;"><div class="cm-gutter cm-lineNumbers"><div class="cm-gutterElement" style="height: 0px; visibility: hidden; pointer-events: none;">  
</div><div class="cm-gutterElement" style="height: 19.2px; margin-top: 4px;">enable</div><div class="cm-gutterElement" style="height: 19.2px; margin-top: 4px;">clock set HH:MM:SS 19 March 2026</div><div class="cm-gutterElement" style="height: 19.2px; margin-top: 4px;">configure terminal</div><div class="cm-gutterElement" style="height: 19.2px; margin-top: 4px;">clock timezone CET 1</div><div class="cm-gutterElement" style="height: 19.2px; margin-top: 4px;">ntp master 3</div><div class="cm-gutterElement" style="height: 19.2px; margin-top: 4px;">end</div></div></div><div aria-multiline="true" aria-readonly="true" autocapitalize="none" autocorrect="off" class="cm-content" contenteditable="true" role="textbox" spellcheck="false" style="tab-size: 4;" translate="no"><div class="cm-line">write memory</div></div></div></div></div>**Vérification :**

<div id="bkmrk-show-clock-show-ntp-"><div class="cm-editor ͼ1 ͼ2 ͼ4 ͼ1q"><div aria-live="polite" style="position: fixed; top: -10000px;">  
</div><div class="cm-scroller" tabindex="-1"><div aria-hidden="true" class="cm-gutters" style="min-height: 46.4px; position: sticky;"><div class="cm-gutter cm-lineNumbers"><div class="cm-gutterElement" style="height: 0px; visibility: hidden; pointer-events: none;">  
</div><div class="cm-gutterElement" style="height: 19.2px; margin-top: 4px;">show clock</div><div class="cm-gutterElement" style="height: 19.2px; margin-top: 4px;">show ntp status</div></div></div></div></div></div>### Switchs (les deux)

<div id="bkmrk-enable-configure-ter"><div class="cm-editor ͼ1 ͼ2 ͼ4 ͼ1r"><div aria-live="polite" style="position: fixed; top: -10000px;">  
</div><div class="cm-scroller" tabindex="-1"><div aria-hidden="true" class="cm-gutters" style="min-height: 123.2px; position: sticky;"><div class="cm-gutter cm-lineNumbers"><div class="cm-gutterElement" style="height: 0px; visibility: hidden; pointer-events: none;">  
</div><div class="cm-gutterElement" style="height: 19.2px;">enable</div><div class="cm-gutterElement" style="height: 19.2px;">configure terminal</div><div class="cm-gutterElement" style="height: 19.2px;">clock timezone CET 1</div><div class="cm-gutterElement" style="height: 19.2px;">ntp server 192.168.99.1 // &lt;IP_du_routeur&gt;</div><div class="cm-gutterElement" style="height: 19.2px;">end</div><div class="cm-gutterElement" style="height: 19.2px;">write memory</div></div></div></div></div></div>**Vérification :**

<div id="bkmrk-show-clock-show-ntp--1"><div class="cm-editor ͼ1 ͼ2 ͼ4 ͼ1s"><div aria-live="polite" style="position: fixed; top: -10000px;">  
</div><div class="cm-scroller" tabindex="-1"><div aria-hidden="true" class="cm-gutters" style="min-height: 46.4px; position: sticky;"><div class="cm-gutter cm-lineNumbers"><div class="cm-gutterElement" style="height: 19.2px; margin-top: 4px;">show clock</div><div class="cm-gutterElement" style="height: 19.2px; margin-top: 4px;">show ntp associations</div></div></div></div></div></div>### Points importants

- Ne pas mettre `clock summer-time CEST recurring` pour l'instant (on est encore en heure d'hiver, ça décalerait d'1h)
- Remplacer `<IP_du_routeur>` par une IP visible dans `show ip interface brief` sur le routeur
- Le `clock set` est à faire **avant** le `configure terminal`, sinon la commande n'est pas disponible

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## Bilan des commandes AVEC Internet

### Routeur 

<div id="bkmrk-enable-configure-ter-1"><div class="cm-editor ͼ1 ͼ2 ͼ4 ͼ1r"><div aria-live="polite" style="position: fixed; top: -10000px;">  
</div><div class="cm-scroller" tabindex="-1"><div aria-hidden="true" class="cm-gutters" style="min-height: 123.2px; position: sticky;"><div class="cm-gutter cm-lineNumbers"><div class="cm-gutterElement" style="height: 0px; visibility: hidden; pointer-events: none;">  
</div><div class="cm-gutterElement" style="height: 19.2px;">enable</div><div class="cm-gutterElement" style="height: 19.2px;">configure terminal</div><div class="cm-gutterElement" style="height: 19.2px;">  
</div><div class="cm-gutterElement" style="height: 19.2px;">ntp server 0.fr.pool.org // serveur de google ntp 1 </div><div class="cm-gutterElement" style="height: 19.2px;">ntp server 1.fr.pool.org // serveur de google ntp 2 si il y a une dépanne d'un serveur de Google</div><div class="cm-gutterElement" style="height: 19.2px;">ntp master 3 // Car on serveur qui possède internet</div><div class="cm-gutterElement" style="height: 19.2px;">ntp source GigabitEthernet0/0/0.999 // Source vlan 999</div><div class="cm-gutterElement" style="height: 19.2px;">  
</div><div class="cm-gutterElement" style="height: 19.2px;">exit </div><div class="cm-gutterElement" style="height: 19.2px;">write memory</div></div></div></div></div></div>### Switchs 

<div id="bkmrk-enable-configure-ter-2"><div class="cm-editor ͼ1 ͼ2 ͼ4 ͼ1r"><div aria-live="polite" style="position: fixed; top: -10000px;">  
</div><div class="cm-scroller" tabindex="-1"><div aria-hidden="true" class="cm-gutters" style="min-height: 123.2px; position: sticky;"><div class="cm-gutter cm-lineNumbers"><div class="cm-gutterElement" style="height: 0px; visibility: hidden; pointer-events: none;">  
</div><div class="cm-gutterElement" style="height: 19.2px;">enable</div><div class="cm-gutterElement" style="height: 19.2px;">configure terminal</div><div class="cm-gutterElement" style="height: 19.2px;">  
</div><div class="cm-gutterElement" style="height: 19.2px;">ntp server 192.168.99.1 // &lt;IP_du_routeur&gt;</div><div class="cm-gutterElement" style="height: 19.2px;">clock timezone CET 1 // Fuseau horaire Europe +1h </div><div class="cm-gutterElement" style="height: 19.2px;">clock summer-time CEST recurring last Sun Mar 2:00 last Sun Oct 3:00 // Fuseau horaire +2h si heure d'été</div><div class="cm-gutterElement" style="height: 19.2px;">  
</div><div class="cm-gutterElement" style="height: 19.2px;">exit </div><div class="cm-gutterElement" style="height: 19.2px;">write memory</div></div></div></div></div></div>**Vérification :**

<div id="bkmrk-show-clock-show-ntp--2"><div class="cm-editor ͼ1 ͼ2 ͼ4 ͼ1r"><div class="cm-scroller" tabindex="-1"><div aria-hidden="true" class="cm-gutters" style="min-height: 123.2px; position: sticky;"><div class="cm-gutter cm-lineNumbers"><div class="cm-gutterElement" style="height: 19.2px;"><div id="bkmrk-show-clock-show-ntp--3"><div class="cm-editor ͼ1 ͼ2 ͼ4 ͼ1s"><div aria-live="polite" style="position: fixed; top: -10000px;">  
</div><div class="cm-scroller" tabindex="-1"><div aria-hidden="true" class="cm-gutters" style="min-height: 46.4px; position: sticky;"><div class="cm-gutter cm-lineNumbers"><div class="cm-gutterElement" style="height: 19.2px; margin-top: 4px;">show clock</div><div class="cm-gutterElement" style="height: 19.2px; margin-top: 4px;">show ntp associations</div></div></div></div></div></div></div></div></div></div></div></div>