[c-nsp] configuring RTC on a Cisco 1841 router

[Blake Dunlap]

http://www.cisco.com/en/US/docs/ios/12_2/configfun/command/reference/frf012.html#wp1017738

-Blake

On Fri, Jul 6, 2012 at 10:41 AM, Martin T <m4rtntns at gmail.com> wrote:

> Hi,
>
> some Cisco switches and routers have real-time clock built in. For
> example Cisco 4500 series switch with WS-X4516-10GE SUP has a
> RTC(CR1632 battery), Cisco 880 series routers or Cisco 1841
> router(CR1225 battery). In case I remove the CR1225 battery from Cisco
> 1841 battery socket and power on the router, it displays
> "*01:16:27.911 UTC Thu Jan 1 1970" in "show clock" output which is
> obvious as it has no clock source. Some platforms should default back
> to "Mar 1 1993". I can correct the date and time within the IOS with
> "clock set" command, but after the reload time is once again reset to
> "Jan 1 1970" while the battery is in it's socket. Is there a way to
> configure RTC when RTC battery/supercapacitor is for example replaced
> with a new one?
>
>
> Martin
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