EIGRP Stub Explained

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:

  1. It advertises all networks that fall within the range of your network commmand on all active interfaces.
  2. 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