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136 lines
5.8 KiB
Markdown
Interface (NICs) Bonding in Linux using nmcli
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Today, we'll learn how to perform Interface (NICs) bonding in our CentOS 7.x using nmcli (Network Manager Command Line Interface).
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NICs (Interfaces) bonding is a method for linking **NICs** together logically to allow fail-over or higher throughput. One of the ways to increase the network availability of a server is by using multiple network interfaces. The Linux bonding driver provides a method for aggregating multiple network interfaces into a single logical bonded interface. It is a new implementation that does not affect the older bonding driver in linux kernel; it offers an alternate implementation.
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**NIC bonding is done to provide two main benefits for us:**
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1. **High bandwidth**
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1. **Redundancy/resilience**
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Now lets configure NICs bonding in CentOS 7. We'll need to decide which interfaces that we would like to configure a Team interface.
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run **ip link** command to check the available interface in the system.
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$ ip link
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Here we are using **eno16777736** and **eno33554960** NICs to create a team interface in **activebackup** mode.
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Use **nmcli** command to create a connection for the network team interface,with the following syntax.
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# nmcli con add type team con-name CNAME ifname INAME [config JSON]
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Where **CNAME** will be the name used to refer the connection ,**INAME** will be the interface name and **JSON** (JavaScript Object Notation) specifies the runner to be used.**JSON** has the following syntax:
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'{"runner":{"name":"METHOD"}}'
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where **METHOD** is one of the following: **broadcast, activebackup, roundrobin, loadbalance** or **lacp**.
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### 1. Creating Team Interface ###
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Now let us create the team interface. here is the command we used to create the team interface.
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# nmcli con add type team con-name team0 ifname team0 config '{"runner":{"name":"activebackup"}}'
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run **# nmcli con show** command to verify the team configuration.
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# nmcli con show
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### 2. Adding Slave Devices ###
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Now lets add the slave devices to the master team0. here is the syntax for adding the slave devices.
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# nmcli con add type team-slave con-name CNAME ifname INAME master TEAM
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Here we are adding **eno16777736** and **eno33554960** as slave devices for **team0** interface.
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# nmcli con add type team-slave con-name team0-port1 ifname eno16777736 master team0
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# nmcli con add type team-slave con-name team0-port2 ifname eno33554960 master team0
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Verify the connection configuration using **#nmcli con show** again. now we could see the slave configuration.
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#nmcli con show
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### 3. Assigning IP Address ###
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All the above command will create the required configuration files under **/etc/sysconfig/network-scripts/**.
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Lets assign an IP address to this team0 interface and enable the connection now. Here is the command to perform the IP assignment.
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# nmcli con mod team0 ipv4.addresses "192.168.1.24/24 192.168.1.1"
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# nmcli con mod team0 ipv4.method manual
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# nmcli con up team0
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### 4. Verifying the Bonding ###
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Verify the IP address information in **#ip add show team0** command.
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#ip add show team0
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Now lets check the **activebackup** configuration functionality using the **teamdctl** command.
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# teamdctl team0 state
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Now lets disconnect the active port and check the state again. to confirm whether the active backup configuration is working as expected.
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# nmcli dev dis eno33554960
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disconnected the active port and now check the state again using **#teamdctl team0 state**.
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# teamdctl team0 state
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Yes its working cool !! we will connect the disconnected connection back to team0 using the following command.
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#nmcli dev con eno33554960
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We have one more command called **teamnl** let us show some options with **teamnl** command.
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to check the ports in team0 run the following command.
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# teamnl team0 ports
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Display currently active port of **team0**.
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# teamnl team0 getoption activeport
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Hurray, we have successfully configured NICs bonding :-) Please share feedback if any.
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--------------------------------------------------------------------------------
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via: http://linoxide.com/linux-command/interface-nics-bonding-linux/
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作者：[Arun Pyasi][a]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](http://linux.cn/) 荣誉推出
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[a]:http://linoxide.com/author/arunp/ |