Day 2 - EIGRP - Mindah Jalur - Bandwidth

Dalam EIGRP, selain dengan melakukan manipulasi delay, kita bisa juga melakukan manipulasi nilai bandwidth agar jalur bisa kita pindah.

Lab kali ini kita akan membahas bagaimana cara konfigurasi pemindahan jalur dengan melakukan manipulasi nilai bandwidth.


Lab 12 - EIGRP - Mindah Jalur - Bandwidth

Topologi yang digunakan adalah sbb :
 
Skenarionya adalah untuk bandwidth interface Fa0/0 di R1 akan kita rubah menjadi lebih rendah dari bandwidth interface Serial0/0.


Konfigurasi R1:

interface Loopback0
 ip address 1.1.1.1 255.255.255.255
!
interface FastEthernet0/0
 ip address 13.13.13.1 255.255.255.0
!
interface Serial0/0
 ip address 12.12.12.1 255.255.255.0
!

router eigrp 1
 network 1.1.1.1 0.0.0.0
 network 12.12.12.1 0.0.0.0
 network 13.13.13.1 0.0.0.0
 no auto-summary

Konfigurasi R2 :

interface Loopback0
 ip address 2.2.2.2 255.255.255.255
!
interface FastEthernet0/0
 ip address 23.23.23.2 255.255.255.0
!
interface Serial0/0
 ip address 12.12.12.2 255.255.255.0
!

router eigrp 1
 network 2.2.2.2 0.0.0.0
 network 12.12.12.2 0.0.0.0
 network 23.23.23.2 0.0.0.0
 no auto-summary

Konfigurasi R3 :

interface Loopback0
 ip address 3.3.3.3 255.255.255.255
!
interface FastEthernet0/0
 ip address 13.13.13.3 255.255.255.0
!
interface FastEthernet0/1
 ip address 23.23.23.3 255.255.255.0
!

router eigrp 1
 network 3.3.3.3 0.0.0.0
 network 13.13.13.3 0.0.0.0
 network 23.23.23.3 0.0.0.0
 no auto-summary
Kita coba cek kondisi awal routing di R1 terhadap IP 3.3.3.3/32 :
R1(config-router)#do sh ip route 3.3.3.3
Routing entry for 3.3.3.3/32
  Known via "eigrp 1", distance 90, metric 409600, type internal
  Redistributing via eigrp 1
  Last update from 13.13.13.3 on FastEthernet0/0, 00:07:11 ago
  Routing Descriptor Blocks:
  * 13.13.13.3, from 13.13.13.3, 00:07:11 ago, via FastEthernet0/0
      Route metric is 409600, traffic share count is 1
      Total delay is 6000 microseconds, minimum bandwidth is 10000 Kbit
      Reliability 255/255, minimum MTU 1500 bytes
      Loading 1/255, Hops 1

Terlihat bahwa untuk routing ke arah IP 3.3.3.3/32 langsung melalui Fa0/0.


Sekarang kita coba rubah nilai bandwidth pada interface Fa0/0 agar lebih kecil dari bandwidth interface Serial0/0, dilanjutkan dengan clear EIGRP relation nya :

R1(config-if)#int fa0/0
R1(config-if)#bandwidth 1000
R1(config-if)#do clear ip eigrp neighbor
R1(config-if)#
*Mar  1 00:28:58.839: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 12.12.12.2 (Serial0/0) is down: manually cleared
*Mar  1 00:28:58.859: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 13.13.13.3 (FastEthernet0/0) is down: manually cleared
R1(config-if)#
*Mar  1 00:29:02.411: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 12.12.12.2 (Serial0/0) is up: new adjacency
*Mar  1 00:29:03.323: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 13.13.13.3 (FastEthernet0/0) is up: new adjacency


Sekarang kita coba cek lagi di EIGRP topologi untuk IP 3.3.3.3/32 :

R1(config-if)#do sh ip eigrp topology 3.3.3.3 255.255.255.255
IP-EIGRP (AS 1): Topology entry for 3.3.3.3/32
  State is Passive, Query origin flag is 1, 1 Successor(s), FD is 2323456
  Routing Descriptor Blocks:
  12.12.12.2 (Serial0/0), from 12.12.12.2, Send flag is 0x0
      Composite metric is (2323456/409600), Route is Internal
      Vector metric:
        Minimum bandwidth is 1544 Kbit
        Total delay is 26000 microseconds
        Reliability is 255/255
        Load is 1/255
        Minimum MTU is 1500
        Hop count is 2
  13.13.13.3 (FastEthernet0/0), from 13.13.13.3, Send flag is 0x0
      Composite metric is (2713600/128256), Route is Internal
      Vector metric:
        Minimum bandwidth is 1000 Kbit
        Total delay is 6000 microseconds
        Reliability is 255/255
        Load is 1/255
        Minimum MTU is 1500
        Hop count is 1

Terlihat bahwa untuk bandwidth interface Fa0/0 (1000 Kbit) lebih kecil dari pada bandwidth interface Serial0/0 (1544 Kbit).


Kita cek di routing table dilanjutkan dengan traceroute ke IP 3.3.3.3/32 :
R1(config-if)#do sh ip route 3.3.3.3
Routing entry for 3.3.3.3/32
  Known via "eigrp 1", distance 90, metric 2323456, type internal
  Redistributing via eigrp 1
  Last update from 12.12.12.2 on Serial0/0, 00:02:58 ago
  Routing Descriptor Blocks:
  * 12.12.12.2, from 12.12.12.2, 00:02:58 ago, via Serial0/0
      Route metric is 2323456, traffic share count is 1
      Total delay is 26000 microseconds, minimum bandwidth is 1544 Kbit
      Reliability 255/255, minimum MTU 1500 bytes
      Loading 1/255, Hops 2
R1(config-if)#do traceroute 3.3.3.3
Type escape sequence to abort.
Tracing the route to 3.3.3.3

  1 12.12.12.2 32 msec 24 msec 4 msec
  2 23.23.23.3 8 msec *  36 msec
Terlihat bahwa routing ke arah IP 3.3.3.3/32 sudah berubah melalui interface Serial0/0 ke arah router R2. 

Dan hasil traceroute pada hop pertama adalah router R2 (12.12.12.2) dilanjutkan dengan hop kedua router R3 (23.23.23.3).