Contents
How do I set up an EIGRP stub?
Configuring the EIGRP Stub Routing Named Configuration
- enable.
- configure terminal.
- router eigrp virtual-instance-name.
- Enter one of the following:
- network ip-address [wildcard-mask]
- eigrp stub [receive-only] [leak-map name] [connected] [static ] [summary] [redistributed]
- exit-address-family.
- end.
What is an EIGRP stub?
Stub routing is an EIGRP feature primarily designed to conserve local router resources, such as memory and CPU, and improve network stability. The stub routing feature is most commonly used in hub-and-spoke networks. The router will send Query packets the stub router if it needs information about a route or routes.
How does EIGRP Stub work?
Meaning, EIGRP stub routers are designed for very small branch office routers or for edges of the network. By setting a router as a stub, it’s neighbours will then suppress sending any queries to the stub router since edge routers shouldn’t have backup paths to a particular network if it isn’t in transit for traffic.
Why do we need stub area?
Stub areas are shielded from external routes but receive information about networks that belong to other areas of the same OSPF domain. Like stub areas, they prevent the flooding of AS-external link-state advertisements (LSAs) into NSSAs and instead rely on default routing to external destinations.
Is the EIGRP stub router an all or nothing solution?
EIGRP stubs are not an “all or nothing” solution. We have different flavors so you can choose to which types of routes the stub router should receive queries or not. Receive-only: The stub router will not advertise any network. Connected: allows the stub router to advertise directly connected networks.
Is there a way to trick EIGRP into advertising routes?
You can trick EIGRP into advertising routes it learned from other rotuers (even as a stub router) by using a stub leak-map Technically, you can get away with using eigrp stub leak-map indefinitely, without upgrading your ipbase image.
How is Cisco crippled EIGRP in the ipbase image?
I really don’t like how Cisco crippled EIGRP in the ipbase image… at a minimum, you should get some kind of warning that your configuration won’t work, but they haven’t done that either. As you discovered, eigrp stub prevents EIGRP from advertising downstream routes from the switches connected to your distribution.
What’s the difference between EIGRP and passive interface?
ReneMolenaar says: 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.