After operators disable IMET (Type-3) advertisements on a city leaf, BUM delivery for a VNI breaks. What does that confirm?
Select an answer to reveal the explanation.
Short Explanation
Turn off IMET and the VNI guest list goes blank—BUM has nowhere sensible to go. Type-3 is how leaves learn who is in the broadcast domain for inclusive floods. It is not optional wallpaper, and Type-5 will not fill that seat.
Full Explanation
Type-3 Inclusive Multicast Ethernet Tag routes advertise VNI membership so VTEPs know where to replicate BUM (commonly via ingress replication). Removing IMET breaks that membership discovery. Type-5 does not substitute for IMET, and disabling Type-3 does not improve BUM by invoking spanning-tree hub-and-spoke behavior.