Turns on the EIGRP process. 100 is the autonomous system number, which can be a number between 1 and 65,535.
Router(config)# router eigrp 100
All routers in the same autonomous system must use the same autonomous system number.
Specifies which network to advertise in EIGRP:
Router(config-router)# network 10.0.0.0
Sets the bandwidth of this interface to x kilobits to allow EIGRP to make a better metric calculation:
Router(config-if)# bandwidth x
TIP: the bandwidth command is used for metric calculations only. It does not change interface performace.
Remove the network from the EIGRP process:
Router(config-router)# no network 10.0.0.0
Disables routing process 100:
Router(config)# no router eigrp 100
Identifies which interfaces or networks to include in EIGRP. interfaces must be configured with address that fall within the wildcard mask range of the network statement. A network mask can also be used here:
Router(config-router)# network 10.0.0.0 0.255.255.255
Changes the default k values used in metric calculation. These are the default values:
tos=0, k1=1, k2=0, k3=1, k4=0, k5=0
Router(config-router)# metric weights tos k1 k2 k3 k4 k5
TIP: For two routers to form a neigbors relationship in EIGRP, the k values must match.
CAUTION: Unless you are very familiar with what is occurring in your network, it is recommended that you do not change the k values.
Turns off the auto-summarization feature:
Router(config-router)# no auto-summary
Enters interface configuration mode:
Router(config)# interface fastethernet 0/0
Enables manual summarization for EIGRP autonomous system 100 on this specific interface for the given address and mask. An administrative distance of 75 is assigned to this summary route.
Router(config-ip)# ip summary-add eigrp 100 10.0.0.0 255.255.0.0 75
NOTE: Recommended practice is that you turn off automatic summarization. if necessary, use the ip summary-address command and summarize manually what you need to.
Instructs the router to include routes with a metric less than or equal to n times the minimum metric route for that destination, where n is the number specified by variance command:
Router(config-router)# variance n
NOTE: if a path is not a feasible successor, it is not used in load balancing.
NOTE: EIGRP supports up to six unequal-cost paths.
Enters interface configuration mode:
Router(config)# interface serial 0/0
Set the bandwidth of this interface to 256 kilobits to allow EIGRP to make a better metric calculation:
Router(config-if)# bandwidth 256
Enters interface configuration mode:
Router(config)# interface serial 0/0
Enables Message Disgest 5 algorithm (MD5) authentication in EIGRP packets over the interface:
Router(config-if)# ip authentication mode eigrp 100 md5
Enables authentication of EIGRP packets. aloha is the name of the key chain:
Router(config-if)# ip authentication key-chain eigrp 100 aloha
Returns to global configuration mode:
Router(config-if)# exit
Identifies a key chain. The name must match the name configured interface configuration mode above:
Router(config)# key chain aloha
Identifies the key number:
Router(config-keychain)# key 1
Identifies the key string:
Router(config-keychain)# key-string mozart
Verifying EIGRP:
Display the neigbor table:
Router# show ip eigrp neigbors
Display a detailed the neigbor table:
Router# show ip eigrp neigbors detail
Show information for each interface:
Router# show ip eigrp interfaces
Show information for a specific interface:
Router# show ip eigrp interfaces serial 0/0
Show information for interfaces running process 100:
Router# show ip eigrp interfaces 100
Display the topology table:
Router# show ip eigrp topology
TIP: The show ip eigrp topology command shows you where your feasible successors are.
Show the number and type of packets sent and receive:
Router# show ip eigrp traffic
Show a routing table with only EIGRP entries:
Router# show ip route eigrp
Display events/actions related to EIGRP feasible successor metrics (FSM):
Router# debug eigrp fsm
Display events/actions related to EIGRP packets:
Router# debug eigrp packet
Display events/actions related to your neighbors:
Router# debug eigrp neighbor
Display events/actions related to your neighbors:
Router# debug ip eigrp neighbor
Display EIGRP event notifications:
Router# debug ip eigrp notifications
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