[c-nsp] NTP on a 3750 & 2970

Joshua Morgan joshua.morgan at gmail.com
Wed Jun 13 03:59:59 EDT 2012


I stand corrected then. I've only ever tried on a 3750G with IP Base, must have been doing something wrong!

Sent from my iPhone

On 12/06/2012, at 3:40, Peter Rathlev <peter at rathlev.dk> wrote:

> On Tue, 2012-06-12 at 03:03 +1000, Joshua Morgan wrote:
>> Last time I tried, 3750 does not. I don't think any Catalyst can do that.
> 
> We have previously used C6k/Sup720 running SFX for this. I just tested a
> 3560 running 12.2(58)SE1 IP Services and it works fine.
> 
> I actually just tried a regular IP Base switch (also 12.2(58)SE1) and it
> also answers to "ntpdate -q", even without "ntp master".
> 
> On that note: Use "ntp access-group peer <X>" to limit who can talk NTP
> with the switch. I haven't been able to limit who can query and who can
> serve via the "query-only" and "serve-only" keywords. I just don't
> understand how it's supposed to work.
> 
> -- 
> Peter
> 
> 
> 



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