windows:windows_time_service_ntp
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| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| windows:windows_time_service_ntp [2025/10/07 11:20] – aperez | windows:windows_time_service_ntp [2025/10/07 12:08] (current) – aperez | ||
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| - | ==== (Optional) Pin NTP to the management path ==== | ||
| - | If you use the out-of-band Management1 (VRF MGMT), constrain NTP to that VRF and source: | ||
| - | |||
| - | <code bash> | ||
| - | configure terminal | ||
| - | ntp local-interface Management1 | ||
| - | ntp server vrf MGMT 0.pool.ntp.org | ||
| - | ntp server vrf MGMT 1.pool.ntp.org | ||
| - | ntp server vrf MGMT 2.pool.ntp.org | ||
| - | ntp server vrf MGMT 3.pool.ntp.org | ||
| - | end | ||
| - | write memory | ||
| - | </ | ||
| - | |||
| - | ---- | ||
| ==== 🔍 Verification ==== | ==== 🔍 Verification ==== | ||
| Line 388: | Line 373: | ||
| + | ---- | ||
| + | ---- | ||
| + | |||
| + | ===== 🕒 NTP and DNS on Cisco Catalyst 9500 (IOS XE 17.12) — Houston, TX ===== | ||
| + | |||
| + | DNS + NTP con zona horaria Central (CST/CDT). '' | ||
| + | |||
| + | <code bash> | ||
| + | conf t | ||
| + | ip name-server 8.8.8.8 | ||
| + | ip name-server 1.1.1.1 | ||
| + | |||
| + | ! NTP servers (FQDN soportado) | ||
| + | ntp server 0.pool.ntp.org | ||
| + | ntp server 1.pool.ntp.org | ||
| + | ntp server 2.pool.ntp.org | ||
| + | ntp server 3.pool.ntp.org | ||
| + | |||
| + | ! (Opcional) Fuente de NTP para dirección estable | ||
| + | ntp source Loopback0 | ||
| + | |||
| + | ! Zona horaria Houston (Central) + DST EE.UU. | ||
| + | clock timezone CST -6 | ||
| + | clock summer-time CDT recurring 2 Sun Mar 2:00 1 Sun Nov 2:00 | ||
| + | |||
| + | end | ||
| + | write memory | ||
| + | </ | ||
| + | |||
| + | ---- | ||
| + | |||
| + | ==== 🔁 (Opcional) Enviar NTP por el VRF de management ==== | ||
| + | Si tu salida a Internet va por **Mgmt-vrf**, | ||
| + | |||
| + | <code bash> | ||
| + | conf t | ||
| + | ntp source Loopback0 | ||
| + | ntp server vrf Mgmt-vrf 0.pool.ntp.org | ||
| + | ntp server vrf Mgmt-vrf 1.pool.ntp.org | ||
| + | ntp server vrf Mgmt-vrf 2.pool.ntp.org | ||
| + | ntp server vrf Mgmt-vrf 3.pool.ntp.org | ||
| + | end | ||
| + | write memory | ||
| + | </ | ||
| + | |||
| + | ---- | ||
| + | |||
| + | ==== 🔍 Verificación ==== | ||
| + | <code bash> | ||
| + | show hosts ! valida resolución DNS | ||
| + | ping 0.pool.ntp.org | ||
| + | show ntp associations | ||
| + | show ntp status | ||
| + | show clock detail | ||
| + | show run | i name-server|ntp|clock | ||
| + | </ | ||
| + | |||
| + | **Esperado: | ||
| + | * Un servidor con '' | ||
| + | * '' | ||
| + | * DNS resolviendo ('' | ||
| + | |||
| + | ---- | ||
| + | ==== 🧠 Notas ==== | ||
| + | * Si algún FQDN no resuelve, prueba primero con **IP** para descartar DNS. | ||
| + | * Asegura salida **UDP/123** desde la interfaz/ | ||
| + | * Puedes marcar un servidor como preferido: | ||
| + | < | ||
| ---- | ---- | ||
| ---- | ---- | ||
windows/windows_time_service_ntp.1759854033.txt.gz · Last modified: 2025/10/07 11:20 by aperez
