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Part 3: Cisco Router commands reference guide : EIGRP

 Today we will going to talk about the Cisco commands specifically on EIGRP which is used on the router and how they are configured as an example. 

We already discuss about the Cisco switches and Cisco router commands ( RIP and OSPF) in our earlier article. Let's start with the EIGRP commands in this article as below.

Fig 1.1- EIGRP Basics

EIGRP Configuration
NDNA_R1(config)#router eigrp 100
NDNA_R1(config-router)#network 10.0.0.0
NDNA_R1(config-router)#network 172.16.0.0 0.0.3.255
NDNA_R1(config-router)#network 192.168.1.1 0.0.0.0
NDNA_R1(config-router)#network 0.0.0.0 255.255.255.255

Disable auto summarization
NDNA_R1(config-router)#no autosummary

Disable EIGRP on a specific interface
NDNA_R1(config-router)#passive-interface serial 0/1

Configure load balancing parameters
NDNA_R1(config-router)#maximum-paths 6
NDNA_R1(config-router)#variance 4

Change interface Hello and Hold timers
NDNA_R1(config-if)#ip hello-interval eigrp 100 3
NDNA_R1(config-if)#ip hold-time eigrp 100 10

Influencing metric calculations by tuning BW and delay of the interface
NDNA_R1(config-if)#bandwidth 265 (kbps)
NDNA_R1(config-if)#delay 120 (tens of microseconds)

EIGRP Authentication
NDNA_R1(config)#key chain NDNA_KEYS
NDNA_R1(config-keychain)#key 1
NDNA_R1(config-keychain-key)#key-string NDNA
NDNA_R1(config-keychain-key)#send-lifetime [start time] [end time] 
NDNA_R1(config-keychain-key)#accept-lifetime [start time] [end time]
NDNA_R1(config-if)#ip authentication mode eigrp 100 md5
NDNA_R1(config-if)#ip authentication key-chain eigrp 100 NDNA_KEYS

EIGRP Verification
NDNA_R1#show ip route eigrp
NDNA_R1#show ip eigrp neighbors
NDNA_R1#show ip eigrp topology
NDNA_R1#show ip eigrp interfaces
NDNA_R1#show ip eigrp traffic

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