ISIS (Intermediate System to Intermediate System)
memiliki 3 buah level yaitu, level 1, level 2 dan level 1/2. Level 2 merupakan area backbone, atau yg di OSPF sering disebut dengan area 0. Level 1/2 digunakan untuk menghubunkan antara Level 2 dan Level 1.
Tujuan Lab :
- Mempelajari routing protokol IS-IS (Intermediate System – Intermediate System), pada level yang sama.
- Kali ini kita akan membuat ISIS Level 2, ikuti topologi di bawah ini.
Topologi Lab :
Metode Lab :
- Set IP pada semua router sesuai dengan topologi di atas.
- Set routing ISIS nya.
- Gunakan NET address dengan format 49.0001.00×0.0x00.x00x.00 dimana X adalah IP loopbacknya.
Verifikasi Lab :
- Lakukan ping ke semua loopback router, pastikan reply.
- Lakukan traceroute untuk mengetahui lewat jalur mana saja trafik itu.
- Lihat routing tabelnya, pastikan semua IP sudah masuk, lihat jenis Level yang digunakan oleh routing ISIS.
- Cek isis neighbor dan database.
Konfigurasi
Router R1
hostname R1
!
interface Loopback0
ip address 1.1.1.1 255.255.255.255
ip router isis
!
interface FastEthernet0/0
ip address 12.12.12.1 255.255.255.0
ip router isis
!
router isis
net 49.0001.0010.0100.1001.00
is-type level-2-only
Router R2
hostname R2
!
interface Loopback0
ip address 2.2.2.2 255.255.255.255
ip router isis
!
interface FastEthernet0/0
ip address 12.12.12.2 255.255.255.0
ip router isis
!
interface FastEthernet0/1
ip address 23.23.23.2 255.255.255.0
ip router isis
!
router isis
net 49.0001.0020.0200.2002.00
is-type level-2-only
Router R3
hostname R3
!
interface Loopback0
ip address 3.3.3.3 255.255.255.255
ip router isis
!
interface FastEthernet0/0
ip address 23.23.23.3 255.255.255.0
ip router isis
!
router isis
net 49.0001.0030.0300.3003.00
is-type level-2-only
Verifikasi
R1(config)#do 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 = 20/37/68 ms R1(config)#do 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 = 40/47/64 ms R1(config)#do tracer 3.3.3.3 Type escape sequence to abort. Tracing the route to 3.3.3.3 1 12.12.12.2 44 msec 40 msec 40 msec 2 23.23.23.3 72 msec 48 msec 40 msec R1(config)# R3(config)#do 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 R2#sh isis neigh System Id Type Interface IP Address State Holdtime Circuit Id R1 L2 Fa0/0 12.12.12.1 UP 26 R2.02 R3 L2 Fa0/1 23.23.23.3 UP 8 R3.02 R2# R2#sh isis database IS-IS Level-2 Link State Database: LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL R1.00-00 0x00000007 0x3F9F 905 0/0/0 R2.00-00 * 0x0000000A 0x9C38 1165 0/0/0 R2.02-00 * 0x00000005 0x2807 1131 0/0/0 R3.00-00 0x00000007 0x8CB8 1052 0/0/0 R3.02-00 0x00000005 0x5078 1170 0/0/0 R2#
Catatan Randy 