Lab 24. Eigrp OTP (Over The Top)

Metode ini digunakan ketika terdapat router yang tidak bisa terhubung dengan router kita dan terpisah oleh ISP. Lab ini hanya bisa di lakukan pada versi ios 15.x keatas agar support dengan metode ini.

*R1

  •  R1(config)#int loopback0
  •  R1(config-if)#ip add 1.1.1.1 255.255.255.255
  •  R1(config)#int f0/0
  •  R1(config-if)#ip add 14.14.14.1 255.255.255.0
  •  R1(config-if)#no shutdown

*R2

  •  R2(config)#int f0/0
  •  R2(config-if)#ip add 14.14.14.2 255.255.255.0
  •  R2(config-if)#no shutdown
  •  R2(config)#int f1/0
  •  R2(config-if)#ip add 24.24.24.1 255.255.255.0
  •  R2(config-if)#no shutdown
  •  R2(config)#int f2/0
  •  R2(config-if)#ip add 34.34.34.1 255.255.255.0
  •  R2(config-if)#no shutdown

*R3

  •  R3(config)#int loopback0
  •  R3(config-if)#ip add 2.2.2.2 255.255.255.255
  •  R3(config)#int f0/0
  •  R3(config-if)#ip add 24.24.24.2 255.255.255.0
  •  R3(config-if)#no shutdown

*R4

  •  R4(config)#int loopback0
  •  R4(config-if)#ip add 3.3.3.3 255.255.255.255
  •  R4(config)#int f0/0
  •  R4(config-if)#ip add 34.34.34.2 255.255.255.0
  •  R4(config-if)#no shutdown

Terdapat 2 cara untuk mengkonfigurasi OTP ini, yaitu:

  • Setiap router connect satu sama lain (full-mesh)
  • Satu router dijadikan pusat remote-neighbor

Disini kita akan coba dengan cara yang kedua yaitu R1 menjadi router reflector. Pastikan dulu kita bisa ping ke ip neighbor.

*R1

  •  R1#ping 24.24.24.2

 Type escape sequence to abort.

 Sending 5, 100-byte ICMP Echos to 24.24.24.2, timeout is 2 seconds:

 !!!!!

 Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms

 R1#ping 34.34.34.2

 Type escape sequence to abort.

 Sending 5, 100-byte ICMP Echos to 34.34.34.3, timeout is 2 seconds:

 !!!!!

Konfigurasi OTP pada R1,R3,R4

*R1

  •  R1(config)#router eigrp IDN
  •  R1(config-router)#address-family ipv4 unicast autonomous-system 123
  •  R1(config-router-af)#remote-neighbors source f0/0 unicast-listen lisp encap 123
  •  R1(config-router-af)#af-interface f0/0
  •  R1(config-router-af-interface)#no next-hop-self
  •  R1(config-router-af-interface)#no split-horizon
  •  R1(config-router-af)#network 1.1.1.1 0.0.0.0
  •  R1(config-router-af)#network 14.14.14.0 0.0.0.255

*R3

  •  R3(config)#router eigrp IDN
  •  R3(config-router)#address-family ipv4 unicast autonomous-system 123
  •  R3(config-router-af)#neighbor 14.14.14.1 f0/0 remote 2 lisp-encap 123
  •  R3(config-router-af)#network 2.2.2.2 0.0.0.0
  •  R3(config-router-af)#network 24.24.24.2 0.0.0.0

*R4

  •  R4(config)#router eigrp IDN
  •  R4(config-router)#address-family ipv4 unicast autonomous-system 123
  •  R4(config-router-af)#neighbor 14.14.14.1 f0/0 remote 2 lisp-encap 123
  •  R4(config-router-af)#network 3.3.3.3 0.0.0.0
  •  R4(config-router-af)#network 34.34.34.2 0.0.0.0

*R3

  •  R3 (config)#do sh ip interface brief | i up

 FastEthernet0/0            24.24.24.2         YES manual   up             up

 LISP123                       2.2.2.2             YES unset   up              up

 Loopback0                   2.2.2.2               YES manual   up             up

*R4

  •  R4 (config)#do sh ip int brief | i up

 FastEthernet0/0            34.34.34.3         YES manual up              up

 LISP123                       3.3.3.3             YES unset up                up

 Loopback0                   3.3.3.3               YES manual up              up

*R1

  •  R1 (config)#do sh ip eigrp neighbors

 EIGRP-IPv4 VR(IDN) Address-Family Neighbors for AS(123)

 H Address        Interface           Hold Uptime     SRTT     RTO      Q Seq

                        (sec)      (ms)      Cnt Num

 1 34.34.34.3      fa0/0                 14 00:05:42 9 100 0 3

 0 24.24.24.2      fa0/0                 14 00:08:35 6 100 0 4

*R3

  •  R3 (config)#do sh ip route eigrp

  1.0.0.0/32 is subnetted, 1 subnets

 D 1.1.1.1 [90/94501211] via 14.14.14.1, 00:11:00, LISP123

  3.0.0.0/32 is subnetted, 1 subnets

 D 3.3.3.3 [90/94501211] via 34.34.34.2, 00:08:07, LISP123

*R4

  •  R4 (config)#do sh ip route eigrp

  1.0.0.0/32 is subnetted, 1 subnets

 D 1.1.1.1 [90/94501211] via 14.14.14.1, 00:08:17, LISP123

  2.0.0.0/32 is subnetted, 1 subnets

 D 2.2.2.2 [90/94501211] via 24.24.24.2, 00:08:17, LISP123

*R3

  •  R3 (config)#do ping 1.1.1.1

 Type escape sequence to abort.

 Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds:

 !!!!!

 Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/2 ms

*R4

  •  R3#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 = 4/4/5 ms

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