Interconnecting Cisco Network Devices, Part 2 (ICND2): (CCNA Exam 640-802 and ICND exam 640-816) (3rd Edition)

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Stephen McQuerry

"Interconnecting Cisco Network Devices, Part 2 (ICND2): (CCNA Exam 640-802 and ICND exam 640-816) (3rd Edition)"

Router Y uses key 1 to send all EIGRP packets because it is the ?¬?rst valid
key in the key chain.
Verifying MD5 Authentication
Example 5-8 shows the output of the show ip eigrp neighbors and show ip route commands on
Router X.
key 2
key-string secondkey
accept-lifetime 04:00:00 Jan 1 2006 infinite
send-lifetime 04:00:00 Jan 1 2006 infinite

!
interface Serial0/0/1
bandwidth 64
ip address 192.168.1.102 255.255.255.224
ip authentication mode eigrp 100 md5
ip authentication key-chain eigrp 100 RouterYchain
Example 5-7 Con?¬?guring EIGRP MD5 Authentication on Router Y (Continued)
Implementing EIGRP 191
The fact that the neighbor table shows the IP address of Router Y indicates that the two routers
have successfully formed an EIGRP adjacency. The routing table veri?¬?es that the 172.17.0.0
network has been learned through EIGRP over the serial connection. Therefore, the MD5
authentication for EIGRP must have been successful between Router X and Router Y.
The results of a ping to the Router Y FastEthernet interface address are also displayed to illustrate
that the link is working.
Summary of Implementing EIGRP
The following summarizes the key points that were discussed in the previous sections:
?– EIGRP is a classless, advanced distance vector routing protocol that runs the DUAL
algorithm.

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Stephen McQuerry

"Interconnecting Cisco Network Devices, Part 2 (ICND2): (CCNA Exam 640-802 and ICND exam 640-816) (3rd Edition)"