If I understand DHCP Snooping is configured at the global level on the switch then we can select the port where the trusted DHCP server is plugged into, and configure that port as DHCP snooping trust.
In most environment when the first time they set up an access switch they don't configure it for DHCP snooping.
the very rare scenarios they set up DHCP snooping only on the access switch where the trusted DHCP is plugged to.
So what about other access switches? do they need to be configured for DHCP snooping too? if so, why it is not enabled by default by cisco at the first place?