Hi Rob,
There’s a big difference between the two. An EIGRP router that is configured as a stub does not receive queries when one of its neighbors loses a network.
Passive-interface is about sending hello packets on an interface. Normally when you use the network command to advertise something then it does two things:
- It advertises all networks that fall within the range of your network commmand on all active interfaces.
- It sends hello packets on all active interfaces that have networks that fall within the range of your network command.
When you enable passive-interface, it will stop sending the hello packets. This is useful on interfaces that connect to end-devices like phones, workstations, servers, etc. You probably don’t want to send EIGRP hello’s in their direction…there are no EIGRP routers there.
Hope this helps!
Rene