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Despite the complexity of DUAL, configuring
EIGRP can be relatively simple. EIGRP configuration commands vary
depending on the protocol that is to be routed (e.g., IP, IPX, or AppleTalk).
This section covers configuration commands for each of these routed
protocols, in addition to special controls for IPX SAP.
Perform the following steps to configure
EIGRP for IP:
- Use the following to enable EIGRP and
define the autonomous system.
router(config)# router eigrp autonomous-system-number
The
autonomous-system-number
is the number that identifies the
autonomous system. It is used to indicate all routers that belong
within the internetwork. This value must match all routers within the
internetwork.
- Indicate which networks are part of the
EIGRP autonomous system on the local router.
router(config-router)# network network-number
The
network-number
is the network number that determines which
interfaces of the router are participating in EIGRP and which networks
are advertised by the router.
The
network
command configures only connected networks. For example, network 3.1.0.0 (on
the far left of the main Figure) is not directly connected to Router A.
Consequently, that network is not part of Router A's configuration.
- When configuring serial links using EIGRP it is important to
configure the bandwidth setting on the interface. If you do not change the bandwidth for
these interfaces EIGRP assumes the default bandwidth on the link
instead of the true bandwidth. If the link is slower, the router may not be able to
converge, routing updates might become lost, or suboptimal path
selection may result.
router(config-if)# bandwidth kilobits
The value,
kilobits, indicates the intended bandwidth in kilobits per
second. For generic serial interfaces (PPP or HDLC), set the bandwidth
to the line speed.
Cisco also recommends that you add the
following command to all of your EIGRP configurations:
router(config-if)# eigrp log-neighbor-changes
This command enables the logging of neighbor adjacency changes to monitor
the stability of the routing system and to help detect problems.
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Interactive
Lab Activity
(Flash, 356
kB) |
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In
this lab exercise, you will configure EIGRP on the
Singapore router. The SanJose3 router is already
configured for EIGRP. |
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