EIGRP - Stub Router

An EIGRP stub router will only advertise connected routes and summary routes. It does not advertise routes received from other EIGRP routers. In addition, stub routers will not send out EIGRP queries. This behavior ensures that the stub router minimizes the routing information it propagates, which can help in reducing unnecessary routing traffic and improving network stability.

Links:

https://forum.networklessons.com/t/eigrp-stub-leak-map/2140/8?u=lagapidis

https://forum.networklessons.com/t/eigrp-stub-leak-map/2140/6?u=lagapidis

https://forum.networklessons.com/t/eigrp-stub-explained/1118/63?u=lagapidis

https://networklessons.com/cisco/ccie-routing-switching-written/eigrp-stub-explained