Generally, in a fresh switch, I see a startup-configuration.
Switch#show startup-config startup-config is not present
But when I do 'sh run' I see a default running config in it. Where does this default running configuration load from? Is it from the ROM?
When there is no startup-config, then it will not show any startup-config. If I do a 'show run' in a fresh switch it shows me some output (some default settings like the ios version, hostname, interfaces details being set to auto etc). So some details of the running-config are there. Where do these come from?
It can also tried it in a lab.
Do a erase startup-config. Do a reload.
Then do a "sh run". It will show some output. I was just thinking where does this running-config come from?