[ntp:questions] Cisco switches in internal time reference pool

Richard B. gilbert rgilbert88 at comcast.net
Sat Mar 3 13:58:36 UTC 2007

Timo Ruiter wrote:
> Hello,
> I'm building a pool of internal time servers (which will run in stratum 
> 2) that will be used for synchronizing time for all other computers in 
> the network.
> Is it a good idea to include some cisco switches (say two) into the 
> pool?  Do they make a reliable time source when used in symmetrical 
> active mode using a statement like "ntp peer ntp2.local.net key 42" in IOS?
> Thanks,
> Timo

Cisco equipment is designed to do routing or switching, as the case may 
be.  It gives priority to the routing or switching it's supposed to be 
doing.  It may work.   Unless there is some reason you NEED to try it, 

Pick four servers to run ntpd and serve time to everyone else. 
Configure them to do so and configure the clients to use those four 
servers.  The four should peer with each other and each should have at 
least one unique source of time.  The servers need not be dedicated; 
ntpd does not require a lot of computing power!

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