ETHERCHANNEL

Konsep Etherchannel => 

• Protokol yang digunakan untuk menggabungkan 2/lebih link fisik menjadi 1 link virtual. 
• juga untuk memperbesar bandwidth.

protocol etherchannel :

• LACP => Open standart
• PAGP => Cisco propietary
• L3   => Open standart

Oke langsung aje kita coba masing-masing protocol diatas.

1. LACP

Topologi :

Konfigurasi (SW2) : 

SW2(config)#int ra fa0/1-2

SW2(config-if-range)#sw mod trunk

SW2(config-if-range)#

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to down

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to down

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to up

SW2(config-if-range)#channel-g

SW2(config-if-range)#channel-group 1 mode ac

SW2(config-if-range)#channel-group 1 mode active

SW2(config-if-range)#

Creating a port-channel interface Port-channel 1

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to down

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to down

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to up

Konfigurasi (SW1) : 

SW1(config)#int ra fa0/1-2

SW1(config-if-range)#sw mode trunk

SW1(config-if-range)#channel-g

SW1(config-if-range)#channel-group 1 mo

SW1(config-if-range)#channel-group 1 mode ac

SW1(config-if-range)#channel-group 1 mode pas

SW1(config-if-range)#channel-group 1 mode passive

SW1(config-if-range)#

Creating a port-channel interface Port-channel 1

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to down

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to down

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to up

SW1(config-if-range)#do wr

Building configuration...

[OK]

Setelah kita sudah melakukan konfigurasi pada SW2 & SW1, maka etherchannel antara dengan SW2 dengan SW1 sudah terbentuk dengan menggunakan protokol LACP.

• Kita dapat membuat etherchannel dalam sebuah switch sebanyak 6 Etherchannel yaitu dengan grup = 1-6, dan grupnya harus sama/sesuai antar Switch.
• Mode LACP :
• Active => mengajak.
• Passive => menunggu.
• Minimal salah satu Switch harus menggunakan mode "Active".
• Untuk memverifikasi gunakan command => "show etherchannel summary".

• SW1#sh etherchannel summary

  Flags: D - down P - in port-channel

  I - stand-alone s - suspended

  H - Hot-standby (LACP only)

  R - Layer3 S - Layer2

  U - in use f - failed to allocate aggregator

  u - unsuitable for bundling

  w - waiting to be aggregated

  d - default port

  
  

  
  

  Number of channel-groups in use: 1

  Number of aggregators: 1

  
  

  Group Port-channel Protocol Ports

  ------+-------------+-----------+----------------------------------------------

  
  

  1 Po1(SU) LACP Fa0/1(P) Fa0/2(P)

  SW1#

Oke kita sudah berhasil membuat etherchannel antara SW1 dengan SW2 menggunakan protokol LACP, selanjutnya kita akan buat Etherchannel antara SW1 dengan SW3 menggunakan protokol PAGP.

2. PAGP

Topologi : sama dengan diatas.

konfigurasi (SW2) :

SW2(config)#int ra fa0/3-4

SW2(config-if-range)#sw mod tr

SW2(config-if-range)#

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/3, changed state to down

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/3, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/4, changed state to down

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/4, changed state to up

SW2(config-if-range)#channel-g

SW2(config-if-range)#channel-group 2 mo

SW2(config-if-range)#channel-group 2 mode d

SW2(config-if-range)#channel-group 2 mode desirable

SW2(config-if-range)#

Creating a port-channel interface Port-channel 2

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/3, changed state to down

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/3, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/4, changed state to down

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/4, changed state to up

SW2(config-if-range)#do wr

Building configuration...

[OK]

konfigurasi (SW3) :

SW3(config)#int ra fa0/1-2

SW3(config-if-range)#sw mod tr

SW3(config-if-range)#channe

SW3(config-if-range)#channel

SW3(config-if-range)#channel-

SW3(config-if-range)#channel-g

SW3(config-if-range)#channel-group 2 mo

SW3(config-if-range)#channel-group 2 mode au

SW3(config-if-range)#channel-group 2 mode auto

SW3(config-if-range)#

Creating a port-channel interface Port-channel 2

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to down

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to down

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to up

SW3(config-if-range)#do wr

Building configuration...

[OK]

Setelah menjalankan command seperti diatas maka kita sudah berhasil membuat etherchannel antara SW2 dengan SW3 menggunakan protokol PAGP.

• Mode PAGP :
• desirable => mengajak
• auto => menunggu

Okeee itu dia cara membuat etherchannel pada cisco, untuk link antara SW1 dengan SW3 silahkan temen-temen coba sendiri bebas mau menggunakan protokol apapun, dan caranya sama saja.

Sekian dari saya mengenai etherchannel, oh iya untuk L3 saya buat terpisah ya.Kurang lebihnya mohon maaf.

 Dimas Kurniawan