Cisco Cisco IOS Software Release 12.0(15)S
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Cisco IOS Release 12.0(15)S
EIGRP Stub Routing
Feature History
This feature module describes the EIGRP Stub Routing feature and includes the following sections:
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Feature Overview
The Enhanced Interior Gateway Routing Protocol (EIGRP) Stub Routing feature improves network
stability, reduces resource utilization, and simplifies stub router configuration.
stability, reduces resource utilization, and simplifies stub router configuration.
Stub routing is commonly used in a hub and spoke network topology. In a hub and spoke network, one
or more end (stub) networks are connected to a remote router (the spoke) that is connected to one or more
distribution routers (the hub). The remote router is adjacent only to one or more distribution routers. The
only route for IP traffic to follow into the remote router is through a distribution router. This type of
configuration is commonly used in WAN topologies where the distribution router is directly connected
to a WAN. The distribution router can be connected to many more remote routers. Often, the distribution
router will be connected to 100 or more remote routers. In a hub and spoke topology, the remote router
must forward all nonlocal traffic to a distribution router, so it becomes unnecessary for the remote router
to hold a complete routing table. Generally, the distribution router need not send anything more than a
default route to the remote router.
or more end (stub) networks are connected to a remote router (the spoke) that is connected to one or more
distribution routers (the hub). The remote router is adjacent only to one or more distribution routers. The
only route for IP traffic to follow into the remote router is through a distribution router. This type of
configuration is commonly used in WAN topologies where the distribution router is directly connected
to a WAN. The distribution router can be connected to many more remote routers. Often, the distribution
router will be connected to 100 or more remote routers. In a hub and spoke topology, the remote router
must forward all nonlocal traffic to a distribution router, so it becomes unnecessary for the remote router
to hold a complete routing table. Generally, the distribution router need not send anything more than a
default route to the remote router.
Release
Modification
12.0(7)T
This feature was introduced.
12.0(15)S
This feature was integrated into Cisco IOS Release 12.0(15)S.