Lab 13. EIGRP – Mindah Jalur – Delay

Lab 13. EIGRP – Mindah Jalur – Delay

Kondisi normal tentunya trafik dari router R1 menuju Loopback R3 adalah langsung menuju router R3 melalui interface G1/0 karena perhitungan bandwidth Gigabitethernetnya. 

Nah bila diinginkan trafik melewati router R2 dulu maka parameter metric bisa kita rubah agar memenuhi hal tersebut, salah satunya adalah Delay. Kondisi awal…

R1#sh ip route 3.3.3.3

Routing entry for 3.3.3.3/32

  Known via "eigrp 10", distance 90, metric 130816, type internal

  Redistributing via eigrp 10

  Last update from 13.13.13.3 on GigabitEthernet1/0, 00:00:15 ago

  Routing Descriptor Blocks:

  * 13.13.13.3, from 13.13.13.3, 00:00:15 ago, via GigabitEthernet1/0

      Route metric is 130816, traffic share count is 1

      Total delay is 5010 microseconds, minimum bandwidth is 1000000 Kbit

      Reliability 255/255, minimum MTU 1500 bytes

       Loading 1/255, Hops 1

Dan jika kita Trace route maka awalnya akan seperti ini

R1#traceroute 3.3.3.3

Type escape sequence to abort.
Tracing the route to 3.3.3.3

  1 13.13.13.3 16 msec 12 msec 8 msec

Kita bisa melakukan pengecekan pada EIGRP topologinya untuk memastikan ada berapa jalur menuju ke 3.3.3.3.

R1#sh ip eigrp topology 3.3.3.3 255.255.255.255
IP-EIGRP (AS 10): Topology entry for 3.3.3.3/32
  State is Passive, Query origin flag is 1, 1 Successor(s), FD is 130816
  Routing Descriptor Blocks:
  13.13.13.3 (GigabitEthernet1/0), from 13.13.13.3, Send flag is 0x0
      Composite metric is (130816/128256), Route is Internal
      Vector metric:
        Minimum bandwidth is 1000000 Kbit
        Total delay is 5010 microseconds
        Reliability is 255/255
        Load is 1/255
        Minimum MTU is 1500
        Hop count is 1
  12.12.12.2 (FastEthernet0/0), from 12.12.12.2, Send flag is 0x0
      Composite metric is (156416/130816), Route is Internal
      Vector metric:
        Minimum bandwidth is 100000 Kbit
        Total delay is 5110 microseconds
        Reliability is 255/255
        Load is 1/255
        Minimum MTU is 1500

        Hop count is 2

Terlihat diatas bahwasanya bandwidth G1/0 (1000000) lebih cepat dibanding pada fastethernet (100000) sedangkan nilai delay Gigabitethenet (5010) juga lebih kecil dibanding delay Fastethernet (5110) Untuk merubah jalurnya, kita memanipulasi nilai metricnya dengan merubah delay.

R1(config)#interface g1/0

R1(config-if)#delay 1000000

Selanjutnya kita cek kembali EIGRP Topologi nya.

R1#sh ip eigrp topology 3.3.3.3 255.255.255.255
IP-EIGRP (AS 10): Topology entry for 3.3.3.3/32
  State is Passive, Query origin flag is 1, 1 Successor(s), FD is 156416
  Routing Descriptor Blocks:
  12.12.12.2 (FastEthernet0/0), from 12.12.12.2, Send flag is 0x0
      Composite metric is (156416/130816), Route is Internal
      Vector metric:
        Minimum bandwidth is 100000 Kbit
        Total delay is 5110 microseconds
        Reliability is 255/255
        Load is 1/255
        Minimum MTU is 1500
        Hop count is 2
  13.13.13.3 (GigabitEthernet1/0), from 13.13.13.3, Send flag is 0x0
      Composite metric is (256130560/128256), Route is Internal
      Vector metric:
        Minimum bandwidth is 1000000 Kbit
        Total delay is 10005000 microseconds
        Reliability is 255/255
        Load is 1/255
        Minimum MTU is 1500

        Hop count is 1

Terlihat diatas bahwasanya delaynya menjadi semakin besar. Sekarang kita cek apakah routenya sudah berpindah melalui Fastethernet atau tidak

R1#sh ip route 3.3.3.3

Routing entry for 3.3.3.3/32
  Known via "eigrp 10", distance 90, metric 156416, type internal
  Redistributing via eigrp 10
  Last update from 12.12.12.2 on FastEthernet0/0, 00:14:03 ago
  Routing Descriptor Blocks:
  * 12.12.12.2, from 12.12.12.2, 00:14:03 ago, via FastEthernet0/0
      Route metric is 156416, traffic share count is 1
      Total delay is 5110 microseconds, minimum bandwidth is 100000 Kbit
      Reliability 255/255, minimum MTU 1500 bytes

      Loading 1/255, Hops 2

Kita coba ping ke IP loopback 3.3.3.3

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 = 24/32/46 ms

Dan ini jika kita Trceroute

R1#traceroute 3.3.3.3

Type escape sequence to abort.
Tracing the route to 3.3.3.3
  1 12.12.12.2 8 msec 36 msec 20 msec

  2 23.23.23.3 32 msec 32 msec 28 msec

Seperti yang kita coba traceroute jalurnya sudah pindah jalurnya lewat R2 dulu baru ke R3.