Tujuan Lab :

• Menerapkan autentikasi antar routing IS-IS.

Topologi Lab :

Metode Lab :

• Menggunakan topologi pada Lab 1 atau bisa download file gns3nya di sini

• Set autentikasi pada R2 dan R3 dengan password idnmd5.

Verifikasi Lab :

• Pastikan semua IP loopback bisa di ping.

• Cek routing tabelnya, pastikan semua IP dan loopback router ada.

• Cek IS-IS database dan neighbornya.

• Cek di show run konfigurasi autentikasinya.

Konfigurasi

R3(config)#key chain idn
R3(config-keychain)#key 1
R3(config-keychain-key)#key-string idnmd5
R3(config)#int fa0/0
R3(config-if)#isis authentication mode md5 level-2
R3(config-if)#isis authentication key-chain idn

R2(config)#key chain idn
R2(config-keychain)#key 1
R2(config-keychain-key)#key-string idnmd5
R3(config)#int fa0/1
R3(config-if)#isis authentication mode md5 level-2
R3(config-if)#isis authentication key-chain idn

Verifikasi

Pastikan semua router bisa saling ping

R1#ping 2.2.2.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 20/31/56 ms
R1#ping 3.3.3.3

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/47/76 ms
R1#

Cek routing tabelnya pastikan semua IPnya sudah masuk

R3#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

     1.0.0.0/32 is subnetted, 1 subnets
i L2    1.1.1.1 [115/30] via 23.23.23.2, FastEthernet0/0
     2.0.0.0/32 is subnetted, 1 subnets
i L2    2.2.2.2 [115/20] via 23.23.23.2, FastEthernet0/0
     3.0.0.0/32 is subnetted, 1 subnets
C       3.3.3.3 is directly connected, Loopback0
     23.0.0.0/24 is subnetted, 1 subnets
C       23.23.23.0 is directly connected, FastEthernet0/0
     12.0.0.0/24 is subnetted, 1 subnets
i L2    12.12.12.0 [115/20] via 23.23.23.2, FastEthernet0/0
R3#

Pastikan semua interface dan protokol isis sudah adjaceny dengan baik.

R2#sh clns neighbor

System Id      Interface   SNPA                State  Holdtime  Type Protocol
R1             Fa0/0       c00c.0bb0.0000      Up     27        L2   IS-IS
R3             Fa0/1       c00e.0bb0.0000      Up     8         L2   IS-IS
R2#