Why does CPU usage increase when switches are rebooted?

Question

network hardware

There is a problem, there is a core-level switch cisco Nexus 3064 Chassis ("48x10GE + 4x40G Supervisor")
So the problem is that the light disappears in the area, and when all switches appear, the processor load rises to the maximum and the traffic starts to tear, then there is an increase in pings, the speed is lost, when all the switches are loaded, the subscribers start working, everything works well, so I don’t understand what the problem could be.
switches all L2 access level cisco 3560 and 2950 48 ports, about 30 of them.

Answer 1

Of course, I didn’t work with Provo at this level, but it seems to me that there is just a shaft of packages, somewhere already not valid ... and a bunch of requests from the equipment. when the switches went up, pulled the entire config into the RAM - it is logical that everything went fine further .... can we somehow limit the number of incoming requests / sessions for some time?
In fact, the same thing happens if, when the server is turned on, the Wirth of the machine is automatically turned on ... until they are loaded (especially all at once), the brakes are quite real

Answer 2

Well, we don’t know what exactly loads the processor of your central switch. It can be STP, CDP / LLDP, loading the database with poppy addresses and some kind of check for incoming poppies, loading ARP ... you need to study the processes in detail.