Ubuntu Server Link Aggregation (Bonding Interfaces)

Akhir-akhir ini saya dan team di NOC di sibukkan dengan reformasi infrastruktur Jaringan serta membangun File Server dan beberapa server intranet lainnya. Dimana dengan topologi jaringan yang baru ini, diharapkan beberapa node jaringan dapat berjalan di lingkungan Gigabit, ya walaupun tidak semua, paling tidak beberapa node bisa merasakan bagaimana nyaman nya menjadi bagian dari keluarga Gigabit :p. Bayangkan, kita bisa melakukan pertukaran data via jaringan dengan troughput 500-700Mbps, tentu lebih nyaman dari copy-copy via flasdisk. :))

Komputer-komputer yang akan dijadikan server pun sebenarnya sudah menggunakan gigabit ethernet, namun dikarenakan ingin mendapatkan performance yang lebih dan rasa penasaran untuk melakukan eksplorasi, akhirnya kesampaianlah niat saya untuk mencoba melakukan bonding interface, dimana bonding ini adalah teknik untuk menggabungkan 2 atau lebih network interfaces card.

Ada beberapa metode yang dapat digunakan untuk melakukan bonding interfaces atau Link Aggregation.
Langsung saja...
Silahkan baca-baca ini, dimana saya sendiri baru mencoba mode 0.

Bonding Modes
You can bond your interfaces in a variety of modes, depending on your hardware capabilities, as follows:
mode=0 (balance-rr)
Round-robin policy: Transmit packets in sequential order from the first available slave through the last. This mode provides load balancing and fault tolerance.
mode=1 (active-backup)
Active-backup policy: Only one slave in the bond is active. A different slave becomes active if, and only if, the active slave fails. The bond's MAC address is externally visible on only one port (network adapter) to avoid confusing the switch. This mode provides fault tolerance. The primary option affects the behavior of this mode.
mode=2 (balance-xor)
XOR policy: Transmit based on [(source MAC address XOR'd with destination MAC address) modulo slave count]. This selects the same slave for each destination MAC address. This mode provides load balancing and fault tolerance.
mode=3 (broadcast)
Broadcast policy: transmits everything on all slave interfaces. This mode provides fault tolerance.
mode=4 (802.3ad)
IEEE 802.3ad Dynamic link aggregation. Creates aggregation groups that share the same speed and duplex settings. Utilizes all slaves in the active aggregator according to the 802.3ad specification.

• Pre-requisites:

• Ethtool support in the base drivers for retrieving the speed and duplex of each slave.

• A switch that supports IEEE 802.3ad Dynamic link aggregation. Most switches will require some type of configuration to enable 802.3ad mode.

mode=5 (balance-tlb)
Adaptive transmit load balancing: channel bonding that does not require any special switch support. The outgoing traffic is distributed according to the current load (computed relative to the speed) on each slave. Incoming traffic is received by the current slave. If the receiving slave fails, another slave takes over the MAC address of the failed receiving slave.

• Prerequisite: Ethtool support in the base drivers for retrieving the speed of each slave.

mode=6 (balance-alb)
Adaptive load balancing: includes balance-tlb plus receive load balancing (rlb) for IPV4 traffic, and does not require any special switch support. The receive load balancing is achieved by ARP negotiation. The bonding driver intercepts the ARP Replies sent by the local system on their way out and overwrites the source hardware address with the unique hardware address of one of the slaves in the bond such that different peers use different hardware addresses for the server.

Untuk percobaan, saya melakukan bonding mode 0 dengan menggunakan 2 fast ethernet, yaitu eth1 dan eth2 (Indah sekali jika dilakukan dengan 2 gigabit ethernet) :D

Install ifenslave
# apt-get install  ifenslave
buat dan edit file ini :

# nano /etc/modprobe.d/bonding.conf

isikan seperti ini :

alias bond0 bonding
options bonding mode=0 miimon=100

Lalu buat interface bond0 dengan konfigurasi dibawah ini :

# nano /etc/network/interfaces

dan isikan seperti ini :

 auto bond0
 iface bond0 inet dhcp
 bond-slaves eth1 eth2

 auto eth1
 iface eth1 inet manual
 auto eth2
 iface eth2 inet manual

 Silahkan sesusikan jika anda menggunakan IP Address static.
 lalu restart services networking atau reboot komputernya.
Lakukan pengecekkan, :

root@noc-nix:~# cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)
Bonding Mode: load balancing (round-robin)
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0
Slave Interface: eth1
MII Status: up
Speed: 100 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:1e:90:80:b6:cc
Slave queue ID: 0
Slave Interface: eth2
MII Status: up
Speed: 100 Mbps
Duplex: full
Link Failure Count: 1
Permanent HW addr: 00:50:ba:8c:37:97
Slave queue ID: 0
root@noc-nix:~#

Percobaan Download:

Selanjutnya mesti bonding-bonding di keluarga bsd, keep share... :D