3.18 EIGRP Stub Routers

CCNP RS 300-101, Implementing EIGRP, Uncategorized

EIGRP stub routers are typically deployed in hub-spoke topologies to provide the following benefits for scalability and optimal convergence:

  1. Improves Network Stability (less convergence; limits scope of EIGRP queries)
  2. Reduces Resource Utilization (less CPU consumption because the routing table is much smaller)
  3. Simplifies Configuration (a single, simple command)

EIGRP stub routing is configured under the routing process with the command:

eigrp stub <options>

… where the options are described in the following snippet:

EIGRP stub routing options, where connected and summary are default options

Routers configured as stubs DO NOT forward EIGRP learned routes to neighbors.

Non-stub routers DO NOT send EIGRP queries to neighbor EIGRP stub routers.

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