{"id":348,"date":"2014-10-14T14:10:12","date_gmt":"2014-10-14T11:10:12","guid":{"rendered":"http:\/\/www.nano-micro.gr\/bl\/?p=348"},"modified":"2014-10-14T14:20:06","modified_gmt":"2014-10-14T11:20:06","slug":"nic-bonding-part-ii","status":"publish","type":"post","link":"https:\/\/nano-micro.gr\/bl\/?p=348","title":{"rendered":"NIC bonding (part II)"},"content":{"rendered":"

In the previous<\/a>\u00a0 article about NIC bonding the example referred to the “active-backup” bonding mode which ensures redundancy. Another very useful mode in NIC\u00a0 bonding is “balance-alb”, which is the most general mode for load balancing and throughput. Our purpose here is to create a new interface that will have twice the throughput of the two slave ports.<\/p>\n

NIC bonding configuration<\/h2>\n

The first steps are the same and the two configurations differ only at a few points. Nevertheless for the sake of simplicity we shall describe all the steps. First, we assume that we know the IP address of the bonded interface (for this article\u2019s purpose it will be 192.168.0.15<\/strong>) and the domain name of the server (here mydomain.com<\/strong>).\u00a0 The process described in this article creates a bonded interface that works in the balance-alb<\/strong> mode (mode 6), which ensures load balancing and throughput. All the commands described here should be entered at the Linux console, so a basic understanding of the console and command line is necessary.\u00a0 The commands will be coloured green and all the points that will need editing are marked red. Use the editor of your choice like nano or vim.<\/p>\n

First update the system:<\/p>\n

sudo apt-get update && sudo apt-get upgrade -y<\/span><\/p>\n

Install the ifenslave package which ensures that two or more NICs can be bonded together.<\/p>\n

sudo apt-get install ifenslave-2.6 -y<\/span><\/p>\n

Edit your \/etc\/modules<\/strong> configuration file. This file describe which kernel modules are initialized at start-up. Ensure that the bonding module is loaded:<\/p>\n

sudo vim \/etc\/modules<\/span><\/p>\n

After editing the file should look like this:<\/p>\n

# \/etc\/modules: kernel modules to load at boot time.
\n#
\n# This file contains the names of kernel modules that should be loaded
\n# at boot time, one per line. Lines beginning with \u201c#\u201d are ignored.<\/p>\n

loop<\/span>
\nlp
\nrtc
\nbonding<\/span><\/p>\n

The configuration of the bonding module is described in a separate file. Edit \/etc\/modprobe.d\/bonding.conf<\/strong> file<\/p>\n

sudo vim \/etc\/modprobe.d\/bonding.conf<\/span><\/p>\n

The contents of the file should be:<\/p>\n

alias bond0 bonding<\/span>
\n options bonding mode=6 miimon=100<\/span><\/p>\n

Now\u00a0 load the bonding kernel module:<\/p>\n

sudo modprobe bonding<\/span><\/p>\n

Backup the existing interfaces file, in case you will need to undo bonding.<\/p>\n

sudo cp -f \/etc\/network\/interfaces \/etc\/network\/interfaces.nobond<\/span><\/p>\n

Edit your interfaces configuration:<\/p>\n

sudo vim \/etc\/network\/interfaces<\/span><\/p>\n

For example, to combine eth0 and eth1 as slaves to the bonding interface bond0 using a simple balance-alb<\/strong> setup, with eth0 being the primary interface:<\/p>\n

# This file describes the network interfaces available on your system<\/span>
\n# and how to activate them. For more information, see interfaces(5).<\/span><\/p>\n

# The loopback network interface<\/span>
\nauto lo<\/span>
\niface lo inet loopback<\/span><\/p>\n

# The primary network interface<\/span>
\nauto bond0<\/span>
\niface bond0 inet manual<\/span>
\n\u00a0\u00a0 \u00a0address 192.168.01.15 #EDIT HERE THE ACTUAL IP ADDRESS<\/span>
\n\u00a0\u00a0 \u00a0netmask 255.255.255.0<\/span>
\n\u00a0\u00a0 \u00a0network 192.168.0.0 # EDIT THE ACTUAL NETWORK ADDRESS<\/span>
\n\u00a0\u00a0 \u00a0broadcast 192.168.0.255 #EDIT HERE THE BROADCAST ADDRESS<\/span>
\n\u00a0\u00a0 \u00a0gateway 192.168.0.250 #EDIT HERE YOUR GATEGAY ADDRESS<\/span>
\n\u00a0\u00a0 \u00a0# bond0 may uses balance-alb. The\u00a0 balance-alb mode is the most general for load balancing and throughput<\/span>
\n\u00a0\u00a0\u00a0 bond-mode balance-alb <\/span>
\n\u00a0\u00a0 \u00a0bond-miimon 100<\/span>
\n\u00a0\u00a0 \u00a0bond-slaves eth0 eth1<\/span>
\ndns-nameservers 192.168.0.100 #EDIT HERE THE ACTUAL ADDRESS OF THE DNS SERVER<\/span>
\n\u00a0\u00a0 \u00a0dns-search mydomain.com<\/span><\/p>\n

#eth0 – the first network interface<\/span>
\nauto eth0<\/span>
\niface eth0 inet manual<\/span>
\nhwaddress ether aa:bb:cc:dd:ee:ff #edit the mac address of eth0 here<\/span>
\nbond-master bond0<\/span><\/p>\n

#eth1 – the second network interface<\/span>
\nauto eth1<\/span>
\niface eth1 inet manual<\/span>
\nhwaddress ether\u00a0aa:bb:cc:dd:ee:ff #edit the mac address of eth1 here<\/span>
\nbond-master bond0<\/span><\/p>\n

copy the interfaces.bonding file to interfaces:<\/p>\n

sudo cp -f \/etc\/network\/interfaces \/etc\/network\/interfaces.bonding<\/span><\/p>\n

Restart the networking service or reboot the system.<\/p>\n

References<\/h2>\n

[1] Wikipedia – Link Aggregation <\/a><\/p>\n

[2] Ubuntu Bonding<\/a><\/p>\n

[3] Understanding NIC bonding with Linux<\/a><\/p>\n

[4] Linux Ethernet bonding driver HOWTO<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

In the previous\u00a0 article about NIC bonding the example referred to the “active-backup” bonding mode which ensures redundancy. Another very useful mode in NIC\u00a0 bonding is “balance-alb”, which is the most general mode for load balancing and throughput. Our purpose … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[28,26,27,29,25],"class_list":["post-348","post","type-post","status-publish","format-standard","hentry","category-programming","tag-link-aggregation","tag-linux","tag-nic-bonding","tag-ubuntu","tag-unix"],"yoast_head":"\nNIC bonding (part II) - Micro - Nano (Mems, VLSI, Tactile Displays research)<\/title>\n<meta name=\"description\" content=\"Network Interface Card bonding (NIC bonding) on Ubuntu server 14.04 The balance-alb case.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/nano-micro.gr\/bl\/?p=348\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"NIC bonding (part II) - 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