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cheatsheet-tldr/tldr/cisco-ios/clock
2025-08-17 00:22:45 +00:00

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---
syntax: markdown
tags: [tldr, cisco-ios]
source: https://github.com/tldr-pages/tldr.git
---
# clock
> Set the system clock.
> More information: <https://www.cisco.com/c/en/us/td/docs/ios/fundamentals/command/reference/cf_book/cf_c1.html#clock>.
- Enter privileged execution mode:
`clock set {{23}}:{{59}}:{{59}} {{31}} {{april}} {{2000}}`
- Auto negotiate with the far end of the link, defaulting to active-clock:
`clock active prefer`
- Auto negotiate with the far end of the link, defaulting to passive-clock:
`clock passive prefer`
- Show the current clock mode negotiated by the firmware:
`clock show interfaces`