User's Manual

38-42
Catalyst 3750 Switch Software Configuration Guide
OL-8550-09
Chapter 38 Configuring IP Unicast Routing
Configuring EIGRP
Beginning in privileged EXEC mode, follow these steps to enable authentication:
Use the no forms of these commands to disable the feature or to return the setting to the default value.
Configuring EIGRP Stub Routing
The EIGRP stub routing feature, available in all images, reduces resource utilization by moving routed
traffic closer to the end user.
Note The IP base image contains only EIGRP stub routing capability, which only advertises connected or
summary routes from the routing tables to other switches in the network. The switch uses EIGRP stub
routing at the access layer to eliminate the need for other types of routing advertisements. For enhanced
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface interface-id Enter interface configuration mode, and specify the
Layer 3 interface to configure.
Step 3
ip authentication mode eigrp autonomous-system md5 Enable MD5 authentication in IP EIGRP packets.
Step 4
ip authentication key-chain eigrp autonomous-system
key-chain
Enable authentication of IP EIGRP packets.
Step 5
exit Return to global configuration mode.
Step 6
key chain name-of-chain Identify a key chain and enter key-chain configuration
mode. Match the name configured in Step 4.
Step 7
key number In key-chain configuration mode, identify the key
number.
Step 8
key-string text In key-chain key configuration mode, identify the key
string.
Step 9
accept-lifetime start-time {infinite | end-time | duration
seconds}
(Optional) Specify the time period during which the key
can be received.
The start-time and end-time syntax can be either
hh:mm:ss Month date year or hh:mm:ss date Month
year. The default is forever with the default start-time
and the earliest acceptable date as January 1, 1993. The
default end-time and duration is infinite.
Step 10
send-lifetime start-time {infinite | end-time | duration
seconds}
(Optional) Specify the time period during which the key
can be sent.
The start-time and end-time syntax can be either
hh:mm:ss Month date year or hh:mm:ss date Month
year. The default is forever with the default start-time
and the earliest acceptable date as January 1, 1993. The
default end-time and duration is infinite.
Step 11
end Return to privileged EXEC mode.
Step 12
show key chain Display authentication key information.
Step 13
copy running-config startup-config (Optional) Save your entries in the configuration file.