Eigrp hanya memiliki MD5 authentication, tidak terdapat clear text authentication.
*R1
- R1(config)#key chain EIGRP
- R1(config-keychain)#key 1
- R1(config-keychain-key)#key-string CCNP
- R1(config-keychain-key)#exit
- R1(config-keychain)#exit
- R1(config)#int fa0/0
- R1(config-if)#ip authentication mode eigrp 10 md5
- R1(config-if)#ip authentication key-chain eigrp 10 EIGRP
*R2
- R2(config)#key chain EIGRP
- R2(config-keychain)#key 1
- R2(config-keychain-key)#key-string CCNP
- R1(config-keychain-key)#exit
- R1(config-keychain)#exit
- R2(config)#int gigabitEthernet 1/0
- R2(config-if)#ip authentication mode eigrp 10 md5
- R2(config-if)#ip authentication key-chain eigrp 10 EIGRP
Coba cek sebagai bentuk verifikasi-nya
*R1
- R1(config)#do debug eigrp packets
EIGRP Packets debugging is on
(UPDATE, REQUEST, QUERY, REPLY, HELLO, IPXSAP, PROBE, ACK, STUB,
SIAQUERY, SIAREPLY)
R1#
*Aug 5 10:06:56.543: EIGRP: Sending HELLO on FastEthernet0/0
*Aug 5 10:06:56.543: AS 10, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
*Aug 5 10:06:56.723: EIGRP: Sending HELLO on Loopback0
CCNP ENTERPRISE | SMK IDN BOARDING SCHOOL 29
*Aug 5 10:06:56.723: AS 10, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
*Aug 5 10:06:56.723: EIGRP: Received HELLO on Loopback0 nbr 1.1.1.1
*Aug 5 10:06:56.723: AS 10, Flags 0x0, Seq 0/0 idbQ 0/0
*Aug 5 10:06:56.723: EIGRP: Packet from ourselves ignored
R1#
*Aug 510:06:57.851: EIGRP: received packet with MD5 authentication, key id = 1
*Aug 5 10:06:57.851: EIGRP: Received HELLO on FastEthernet0/0
nbr
12.12.12.2
*Aug 5 10:06:57.851: AS 10, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
peerQ un/rely 0/0
Untuk menghentikan debug packet-nya, tinggal ketik “do no debug eigrp packets”.