NIC Bonding/Teaming in RHEL6


NIC [network interface card] bonding is a term used to describe a way to increase available bandwidth. 

Bonding is nothing but Linux kernel feature[aka BONDING] that allows to aggregate multiple like interfaces (such as eth0, eth1, eth2 etc) into a single virtual link.

This is done to get higher data rates and as well as link failover. NIC bonding may also be called as NIC Teaming.

Here we will create a bond called bond0, number of ether-net's used are two [eth0 and eth1].

Step 1:
  • Create a bond0 file==> # vim /etc/sysconfig/network-scripts/ifcfg-bond0
  • Append the file with below information and save the file==>
DEVICE=bond0
IPADDR=192.168.57.150
NETMASK=255.255.255.0
USERCTL=no
BOOTPROTO=none
ONBOOT=yes
Note: IP and Netmask needs to be replaced as per your network configuration.

Step 2: 
  • Edit ifcfg-eth0 ==> # vim /etc/sysconfig/network-scripts/ifcfg-eth0 
  • Append the details as follows ==> 
DEVICE=eth0
ONBOOT=yes
USERCTL=no
MASTER=bond0
SLAVE=yes
BOOTPROTO=none

Step 3:
  • Edit ifcfg-eth1 ==> # vim /etc/sysconfig/network-scripts/ifcfg-eth1
  • Append the details as follows ==> 
DEVICE=eth1
ONBOOT=yes
USERCTL=no
MASTER=bond0
SLAVE=yes
BOOTPROTO=none

Step 4: 
  • Load bond driver module.
  • Edit/Create a file as bonding.conf ==> # vim /etc/modprobe.d/bonding.conf 
  • Append the following information ==> 
alias bond0 bonding
options bond0 mode=balance-rr miimon=100
  • For more information about the modes, Click Here and open the first link.
  • Default is balance-rr aka round robin.
Step 5: 
  • Load the bonding module ==> # modprobe bonding
  • Restart the service ==> # service network restart
Step 6:
  • Check the output of ifconfig ==> # ifconfig 
  • Output is as follows ==>
bond0     Link encap:Ethernet  HWaddr 00:0C:29:C2:98:96  
          inet addr:192.168.57.150  Bcast:192.168.57.255  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fec2:9896/64 Scope:Link
          UP BROADCAST RUNNING MASTER MULTICAST  MTU:1500  Metric:1
          RX packets:2473 errors:0 dropped:0 overruns:0 frame:0
          TX packets:14065 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:232980 (227.5 KiB)  TX bytes:850812 (830.8 KiB)

 eth0      Link encap:Ethernet  HWaddr 00:0C:29:C2:98:96  
          inet addr:192.168.57.150  Bcast:192.168.57.255  Mask:255.255.255.0
          UP BROADCAST RUNNING SLAVE MULTICAST  MTU:1500  Metric:1
          RX packets:1237 errors:0 dropped:0 overruns:0 frame:0
          TX packets:7035 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:117922 (115.1 KiB)  TX bytes:424290 (414.3 KiB)

 eth1      Link encap:Ethernet  HWaddr 00:0C:29:C2:98:A0  
          inet addr:192.168.57.150  Bcast:192.168.57.255  Mask:255.255.255.0
          UP BROADCAST RUNNING SLAVE MULTICAST  MTU:1500  Metric:1
          RX packets:1236 errors:0 dropped:0 overruns:0 frame:0
          TX packets:7030 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:115058 (112.3 KiB)  TX bytes:426522 (416.5 KiB)

 lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:16 errors:0 dropped:0 overruns:0 frame:0
          TX packets:16 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:960 (960.0 b)  TX bytes:960 (960.0 b)

Point to note is bond0 will show "UP BROADCAST RUNNING MASTER MULTICAST".
eth0 and eth1 will show SLAVE instead of MASTER i.e. "UP BROADCAST RUNNING SLAVE MULTICAST".

Note: # cat /proc/net/bonding/bond0  will show information/current status about bond0, eth0 and eth1.

Comments

Post a Comment

Popular posts from this blog

Configuration and setting-up of AIDE on RHEL6

AIDE is a powerful package for checking integrity of files on a machine/system. Prerequisites : Just aide package. [root@sunny ~]# yum install aide -y Loaded plugins: refresh-packagekit, rhnplugin This system is not registered with RHN.                                                                         RHN support will be disabled. Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package aide.x86_64 0:0.14-3.el6 set to be updated --> Finished Dependency Resolution Dependencies Resolved ====================================================================...
Read more

Creating a SWAP partition in a LVM

Assuming that you have already created a physical volume ==> volume group. If not then click here..... Now firstly create a logical volume. Check the free space in your volume group by firing a command in terminal as vgdisplay VOLUMEGROUP NAME. [root@sunny ~]# vgdisplay vg_sunny   --- Volume group ---   VG Name               vg_sunny   System ID                Format                lvm2   Metadata Areas        1   Metadata Sequence No  3   VG Access             read/write   VG Status             resizable   MAX LV                0   Cur LV                2   Open LV               2   Max PV ...
Read more

Managing Partitions

Harddisk : It is a storage device which is used to store any kind of data, Currently there are two types of HDD available in market: SATA (Serial Advanced Technology Attachment). PATA (Parallel Advanced Technology Attachment). So the basic command to check your file system structure is fdisk -l, it will show you list of your harddisk's partition table. For more information on this you can see its man page by firing a command as man fdisk. Usually when a hard disk is inserted in a machine it acts like a file and is stored in /dev partition. So suppose that there are 3 hard disk in your machine then there naming convention would be /dev/sda (for the first HDD), /dev/sdb (for the second HDD), /dev/sdc (for the third HDD). parted : Stands for GNU Parted - a partition manipulation program, it is  a  disk  partitioning  and  partition resizing program.  It allows you to create, destroy, resize, move and copy ext2,  linux-swap,FAT,  FAT32,...
Read more