[time-nuts] wifi with time sync

Denny Page denny at cococafe.com
Fri Jan 13 16:48:41 EST 2017

It’s a little more complicated than that. A switch’s main cpu is like a host with rx coalesce set to 100. And there are a surprising number of things that trigger the main cpu beyond management functions. Multicast is a good example. The amount of load on the main cpu can be quite variable, and given ICMP’s low priority, it’s not unusual to see a switch that responds in 1ms suddenly jump to 25-100ms and then drop back.


> On Jan 13, 2017, at 12:25, John Hawkinson <jhawk at MIT.EDU> wrote:
> When you ping a switch, think of the switch as a network switch with a small computer
> (host) attached that handles mangement functions, like responding to pings.

More information about the time-nuts mailing list