windows:windows_time_service_ntp
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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: | ||
+ | < | ||
---- | ---- | ||
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windows/windows_time_service_ntp.1759854033.txt.gz · Last modified: 2025/10/07 11:20 by aperez