1

Think of a dhcp broadcast going through multiple switches. What happens to that broadcast when it reaches the vlan interface (svi)?

2

Depending on the switch config, the SVI can have a DHCP server or relay (helper) running on it. Then it would reply to the discovery or relay it to the DHCP server.

Without a DHCP config on the switch the frame is ignored/dropped (on the SVI - the switch port still forwards the frame across the broadcast domain).

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