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Configuring IP Unicast Routing
Configuring EIGRP
BEFORE YOU BEGIN
Enable EIGRP as described in the Configuring Basic EIGRP Parameters, page 840.
DETAILED STEPS
Use the no forms of these commands to disable the feature or return the setting to the default value.
EXAMPLE
The following example allows EIGRP to use up to 75 percent (42 kbps) of a 56-kbps serial link in autonomous system
209:
Switch(config)# interface serial 0
Switch(config-if)# bandwidth 56
Switch(config-if)# ip bandwidth-percent eigrp 209 75
Configuring EIGRP Route Authentication
EIGRP route authentication provides MD5 authentication of routing updates from the EIGRP routing protocol to prevent
the introduction of unauthorized or false routing messages from unapproved sources.
Command Purpose
1. configure terminal Enter global configuration mode.
2. interface interface-id Enter interface configuration mode, and specify the
Layer 3 interface to configure.
3. no shutdown Enable the interface if necessary. By default, UNIs
and ENIs are disabled and NNIs are enabled.
4. ip bandwidth-percent eigrp percent (Optional) Configure the percentage of bandwidth
that can be used by EIGRP on an interface. The
default is 50 percent.
5. ip summary-address eigrp
autonomous-system-number address mask
(Optional) Configure a summary aggregate address
for a specified interface (not usually necessary if
auto-summary is enabled).
6. ip hello-interval eigrp
autonomous-system-number seconds
(Optional) Change the hello time interval for an
EIGRP routing process. The range is 1 to 65535
seconds. The default is 60 seconds for low-speed
NBMA networks and 5 seconds for all other
networks.
7. ip hold-time eigrp
autonomous-system-number seconds
(Optional) Change the hold time interval for an EIGRP
routing process. The range is 1 to 65535 seconds.
The default is 180 seconds for low-speed NBMA
networks and 15 seconds for all other networks.
Caution: Do not adjust the hold time without
consulting Cisco technical support.
8. no ip split-horizon eigrp
autonomous-system-number
(Optional) Disable split horizon to allow route
information to be advertised by a router out any
interface from which that information originated.
9. end Return to privileged EXEC mode.
10. show ip eigrp interface Display which interfaces EIGRP is active on and
information about EIGRP relating to those interfaces.
11. copy running-config startup-config (Optional) Save your entries in the configuration file.
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