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Learn Cisco Packet Tracer


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Kanvas EtherChannel

Pengenalan

EtherChannel adalah teknologi pada perangkat jaringan (seperti switch Cisco) yang memungkinkan penggabungan beberapa link fisik (biasanya FastEthernet atau GigabitEthernet) menjadi satu link logis (logical interface) yang disebut Port-Channel.

Tujuan utama EtherChannel:

EtherChannel juga mengurangi kebutuhan akan protokol Spanning Tree karena semua link dianggap satu jalur logis, sehingga tidak diblokir oleh STP (Spanning Tree Protocol).

Jenis Protokol EtherChannel

EtherChannel dapat menggunakan dua jenis protokol negosiasi:

2. PAgP (Port Aggregation Protocol)

Perbandingan Mode EtherChannel

Protokol Mode Deskripsi
LACP on Konfigurasi manual, tanpa negosiasi.
LACP active Mengirim LACP frame dan mencoba membentuk.
LACP passive Menunggu LACP frame, hanya bergabung jika lawan “active”.
PAgP on Konfigurasi manual, tanpa negosiasi.
PAgP desirable Aktif mengirim PAgP frame.
PAgP auto Merespons hanya jika lawan menggunakan “desirable”.

Tabel Negosiasi LACP

Switch A Mode Switch B Mode Hasil Negosiasi
active active Berhasil
active passive Berhasil
passive passive Gagal
on on Berhasil
on passive Gagal

Langkah-langkah Konfigurasi EtherChannel

LACP Configuration (Switch ke Switch, 3 Kabel)

Langkah Umum:

(c)# interface range fa0/1 - 3
(c)# channel-group 1 mode active
(c)# channel-protocol lacp
(c)# interface port-channel 1
(c)# switchport mode trunk

Perintah Verifikasi:

# show etherchannel summary
# show etherchannel port-channel
# show running-config

Contoh Konfigurasi LACP

Switch A:

(c)# interface range fa0/1 - 3
(c)# channel-protocol lacp
(c)# channel-group 1 mode active
(c)# interface port-channel 1
(c)# switchport mode trunk

Switch B:

(c)# interface range fa0/1 - 3
(c)# channel-protocol lacp
(c)# channel-group 1 mode active
(c)# interface port-channel 1
(c)# switchport mode trunk

PAgP Configuration

Contoh Konfigurasi PAgP

Switch A (desirable):

(c)# interface range fa0/1 - 2
(c)# channel-group 2 mode desirable
(c)# interface port-channel 2
(c)# switchport mode access

Switch B (auto):

(c)# interface range fa0/1 - 2
(c)# channel-group 2 mode auto
(c)# interface port-channel 2
(c)# switchport mode access

Verifikasi EtherChannel

Perintah untuk melihat status EtherChannel:

# show etherchannel summary
# show etherchannel port-channel
# show etherchannel load-balance
# show interfaces port-channel

Contoh output show etherchannel summary:

Group  Port-channel  Protocol    Ports
------+--------------+-----------+-------------------------------
1      Po1(SU)         LACP       Fa0/1(P) Fa0/2(P) Fa0/3(P)

Flags:
  D - down        P - bundled in port-channel
  S - Layer2      U - in use

Catatan Penting