EIGRP - Authentication
Pada EIGRP hanya ada MD5 Authentication, tidak ada clear text authentcation
Aktifkan Key nya
R1(config)#key chain EIGRP
R1(config-keychain)#key 1
R1(config-keychain-key)#key-string CCIE
Tanamkan di Interface yang terhubung ke R2
R1(config)#int s2/0
R1(config-if)#ip authentication key-chain eigrp 1 EIGRP
R1(config-if)#ip authentication mode eigrp 1 md5
Aktifkan keynya
R2(config)#key chain EIGRP
R2(config-keychain)#key 1
R2(config-keychain-key)#key-string CCIE
R2(config-keychain-key)#exit
Tanamkan di Interface yang terhbung ke R1
R2(config)#int s2/0
R2(config-if)#ip authentication key-chain eigrp 1 EIGRP
R2(config-if)#ip authentication mode eigrp 1 md5
Verifikasi menggunakan debug di R1
R1#Debug EIGRP packets
(UPDATE, REQUEST, QUERY, REPLY, HELLO, UNKNOWN, PROBE, ACK, STUB, SIAQUERY, SIAREPLY)
EIGRP Packet debugging is on
*Aug 6 16:09:03.630: EIGRP: received packet with MD5 authentication, key id = 1
*Aug 6 16:09:03.630: EIGRP: Received UPDATE on Se2/0 - paklen 85 nbr 12.12.12.2
*Aug 6 16:09:03.630: AS 1, Flags 0x0:(NULL), Seq 127/59 interfaceQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1
*Aug 6 16:09:03.630: EIGRP: Enqueueing ACK on Se2/0 - paklen 0 nbr 12.12.12.2 tid 0
*Aug 6 16:09:03.630: Ack seq 127 iidbQ un/rely 0/0 peerQ un/rely 1/1
*Aug 6 16:09:03.636: EIGRP: Sending ACK on Se2/0 - paklen 0 nbr 12.12.12.2 tid 0
*Aug 6 16:09:03.636: AS 1, Flags 0x0:(NULL), Seq 0/127 interfaceQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 1/1
*Aug 6 16:09:03.637: EIGRP: Received ACK on Se2/0 - paklen 0 nbr 12.12.12.2
R1#
*Aug 6 16:09:03.637: AS 1, Flags 0x0:(NULL), Seq 0/60 interfaceQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1
*Aug 6 16:09:03.637: EIGRP: Serial2/0 multicast flow blocking cleared
R1#
*Aug 6 16:09:08.452: EIGRP: received packet with MD5 authentication, key id = 1
*Aug 6 16:09:08.453: EIGRP: Received HELLO on Se2/0 - paklen 70 nbr 12.12.12.2
*Aug 6 16:09:08.453: AS 1, Flags 0x0:(NULL), Seq 0/0 interfaceQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/0
*Aug 6 16:09:08.453: EIGRP: Receiving TIDLIST on Serial2/0 - 1 items 0
*Aug 6 16:09:08.466: EIGRP: Sending TIDLIST on Serial2/0 - 1 items
*Aug 6 16:09:08.466: EIGRP: Sending HELLO on Se2/0 - paklen 70
*Aug 6 16:09:08.466: AS 1, Flags 0x0:(NULL), Seq 0/0 interfaceQ 0/0 iidbQ un/rely 0/0
R1#sh ip eigrp neighbor
EIGRP-IPv4 Neighbors for AS(1)
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
0 12.12.12.2 Se2/0 12 00:11:10 16 100 0 127
R1#
Mantab terlihat komunikasi R1 dan R2 menggunakan EIGRP serta authentication MD5
serta di eigrp neighbor R2 terdetesi oleh R1.
sampai sini selesei
Salam Ngoprek