No luck in rebooting the Control Station.
Echo is still seen in the "history". Per the Support personnel, since it is harmless, we can ignore it. So far it looks like maybe a Netcool / monitoring / scripts running kinda alert.
We are migrating off of this array in a few months, so maybe I will just ignore it until then
so it's a stream of "echo" commands ? If you get on the console of CS and disconnect network cables, new echo still show up ? (I can't remember if you tried that or not)