- Method to contain QUERY domain.
- Good design option for DMVPN spokes.
- Or hub and spoke topologies in general.
- At a remote branch/location often times there’s only has one primary mode of transit back to the enterprise network. If the remote branch is setup as a regular EIGRP router, then every time there’s a topology change, anywhere, the remote branch router will receive a query from its neighbor (probably hub) asking if it knows the downed prefix. A stub EIGRP router will never receive these queries because it is assumed there’s no other EIGRP speaker behind the branch/spoke gateway.
Configuration is very simple. In Named Mode it’s under the Autonomous System.
In Classic Mode it’s under ‘router eigrp <as>’.
Note advertising connected and summary is default.