INTERNETWORKING II

EtherChannel

Presented by:

Kukuh Nugroho 1

Apa itu EtherChannel?

EtherChannel : teknologi yang digunakan pada jaringan switch, yang difungsikan untuk menggabungkan beberapa jalur fisik menjadi satu jalur secara logic. Latar belakang  Jalur Redundant. S1 Fa0/1

xFa0/2

Jalur 1

Jalur 2

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S2 Fa0/1

Fa0/2

Tujuan jalur redundant: 1) Tersedianya jalur backup/cadangan. Istilah lain  Fault Tolerance. 2) Membagi beban trafik data / load balancing.

2

Load Balancing menggunakan EtherChannel

Tujuan load balancing  meningkatkan bandwidth saluran. S2

S1 1 Mbps

x x x

(a)

1 Mbps 1 Mbps 1 Mbps

Digabung

S1 (b)

S2

4 Mbps

Secara logic Port-channel 1

 

Maksimal Jalur fisik = 8. (Perangkat Cisco)

Port-channel 1

EtherChannel menggunakan istilah interface virtual  Port-channel. Syarat interface fisik bisa digabungkan  nomer dari int port-channel sama.

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3

Cara Kerja EtherChannel

Cara kerja  menggunakan protokol negosiasi. Pilihan protokol: Pilihan Protokol

Ciri khusus

PAgP (Port Aggregation Protocol) Dikembangkan oleh Cisco LACP (Line Aggregation Control Protocol) Dikembangkan oleh IEEE dan bersifat “open”. Kode protokol = 802.3ad

Cara EtherChannel dalam menggabungkan port switch: 1. Mengaktifkan protokol negoisasi.

2. Memilih mode interface. PAgP Auto Desirable

LACP

Karakteristik

Passive Menunggu paket dari perangkat switch lawan Active Mengirim paket ke perangkat switch lawan

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4

Proses negosiasi menggunakan PAgP

1. Kirim paket PAgP ke perangkat switch lawan menggunakan alamat MAC multicast 01-00-0C-CC-CC-CC. Paket PAgP

S1 Fa0/1

Fa0/2

S2

2. Negosiasi selesai, kemudian akan membuat interface port-channel. Port-channel 1

Port-channel 1

Port-channel 1

Port-channel 1

S2

S1 S1 Fa0/1

Fa0/2

PAgP

PAgP

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S2

Fa0/1

Fa0/1

Fa0/2

Fa0/2

5

Pilihan kombinasi mode port switch (PAgP)

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6

Panduan Konfigurasi EtherChannel Kecepatan transfer data interface harus sama Menggunakan native VLAN yang sama Sudah diaktifkan mode trunk Rentang VLAN yang diijinkan harus sama

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7

8

[3] Bab 5 - EtherChannel.pdf

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