How to install and configure Open vSwitch with NIC bonding on CentOS 7

Open vSwitch is a multi layer software switch which is free and open source software released under Apache 2 license. In this tutorial we are going to setup Open vSwitch with NIC bonding. NIC Bonding enables two or more network interfaces to act as one interface, to provide higher data rates and as well as link fail over.

Step-1: Create Bond Configuration Files

We need to create these below files in /etc/sysconfig/network-scripts/ directory and append the below parameters on respective files:

[root@linuxcloudy ~]# vi /etc/sysconfig/network-scripts/ifcfg-bond0 DEVICE=bond0 NAME=bond0 TYPE=Bond BONDING_MASTER=yes IPADDR=192.168.43.105 NETMASK=255.255.255.0 GATEWAY=192.168.43.1 DNS1=192.168.43.1 ONBOOT=yes BOOTPROTO=none USERCTL=no NM_CONTROLLED=no BONDING_OPTS="mode=1 miimon=100"

Here, you need to replace IP address and interface names as per setup IP addresses.

Similarly, Modify ens33 and ens34 interfaces configuration files and put the below parameters:

[root@linuxcloudy ~]# vi /etc/sysconfig/network-scripts/ifcfg-ens33 DEVICE=ens33 TYPE=Ethernet USERCTL=no ONBOOT=yes BOOTPROTO=none NM_CONTROLLED=no MASTER=bond0 SLAVE=yes

[root@linuxcloudy ~]# vi /etc/sysconfig/network-scripts/ifcfg-ens34 DEVICE=ens34 TYPE=Ethernet USERCTL=no ONBOOT=yes BOOTPROTO=none NM_CONTROLLED=no MASTER=bond0 SLAVE=yes

Step-2: Load bond driver/module

Check bonding driver/module is loaded for NIC-bonding interface (bond0) is bringing up.

First, load the bonding module, enter:

[root@linuxcloudy ~]# modprobe --first-time bonding [root@linuxcloudy ~]#

Step-3: Restarting Network service:

Now we can restart the network service in order to bring up bond0 interface:

[root@linuxcloudy ~]# systemctl restart network [root@linuxcloudy ~]#

Step-4:  Verify Bond Configuration:

Enter the below commands to verify the bonding configuration status from Linux kernel bonding driver:

[root@linuxcloudy ~]# cat /proc/net/bonding/bond0 Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011) Bonding Mode: fault-tolerance (active-backup) Primary Slave: None Currently Active Slave: ens33 MII Status: up MII Polling Interval (ms): 100 Up Delay (ms): 0 Down Delay (ms): 0 Slave Interface: ens33 MII Status: up Speed: 1000 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 00:0c:29:1b:86:76 Slave queue ID: 0 Slave Interface: ens34 MII Status: up Speed: Unknown Duplex: Unknown Link Failure Count: 1 Permanent HW addr: 00:0c:29:1b:86:80 Slave queue ID: 0 [root@linuxcloudy ~]#

[root@linuxcloudy ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00     inet 127.0.0.1/8 scope host lo        valid_lft forever preferred_lft forever     inet6 ::1/128 scope host        valid_lft forever preferred_lft forever 2: ens34: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP group default qlen 1000     link/ether 00:0c:29:1b:86:76 brd ff:ff:ff:ff:ff:ff 3: ens33: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP group default qlen 1000     link/ether 00:0c:29:1b:86:76 brd ff:ff:ff:ff:ff:ff 4: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000     link/ether 00:0c:29:1b:86:76 brd ff:ff:ff:ff:ff:ff     inet 192.168.43.105/24 brd 192.168.43.255 scope global bond0        valid_lft forever preferred_lft forever     inet6 fe80::20c:29ff:fe1b:8676/64 scope link        valid_lft forever preferred_lft forever [root@linuxcloudy ~]#

Bond configuration done now setup Open vSwitch:

Step 1. Install the Open vSwitch package:

[root@linuxcloudy ~]# yum install https://repos.fedorapeople.org/repos/openstack/EOL/openstack-juno/epel-7/openvswitch-2.3.1-2.el7.x86_64.rpm -y Loaded plugins: fastestmirror …………………………… Installed:   openvswitch.x86_64 0:2.3.1-2.el7 Complete! [root@linuxcloudy ~]#

Step 2. Enable and start the openvswitch daemon:

[root@linuxcloudy ~]# systemctl enable openvswitch Created symlink from /etc/systemd/system/multi-user.target.wants/openvswitch.service to /usr/lib/systemd/system/openvswitch.service. [root@linuxcloudy ~]# systemctl start openvswitch [root@linuxcloudy ~]#

Step 3. Check the OVS switch status:

[root@linuxcloudy ~]# ovs-vsctl show 8351a631-f1e7-43f5-a9ee-736f80778c43     ovs_version: "2.3.1" [root@linuxcloudy ~]#

Step 4. Create an Open vSwitch bridge device called ovs-br0 and verify:

[root@linuxcloudy ~]# ovs-vsctl add-br ovs-br0 [root@linuxcloudy ~]# ovs-vsctl show 8351a631-f1e7-43f5-a9ee-736f80778c43     Bridge "ovs-br0"         Port "ovs-br0"             Interface "ovs-br0"                 type: internal     ovs_version: "2.3.1" [root@linuxcloudy ~]#

Step 5. Modify the bond0 configuration file /etc/sysconfig/network-scripts/ifcfg-bond0 and Create a bridge configuration file /etc/sysconfig/network-scripts/ifcfg-ovs-br0 with the following content:

[root@linuxcloudy ~]# cp -p /etc/sysconfig/network-scripts/ifcfg-bond0 /etc/sysconfig/network-scripts/ifcfg-ovs-br0 [root@linuxcloudy ~]# vi /etc/sysconfig/network-scripts/ifcfg-bond0 TYPE=OVSPort DEVICETYPE=ovs OVS_BRIDGE=ovs-br0 DEVICE=bond0 ONBOOT=yes NAME=bond0 BONDING_MASTER=yes BOOTPROTO=none USERCTL=no NM_CONTROLLED=no BONDING_OPTS="mode=1 miimon=100"

[root@linuxcloudy ~]# vi /etc/sysconfig/network-scripts/ifcfg-ovs-br0 DEVICE=ovs-br0 DEVICETYPE=ovs TYPE=OVSBridge BOOTPROTO=static ONBOOT=yes IPADDR=192.168.43.105 NETMASK=255.255.255.0 GATEWAY=192.168.43.1

Step 6. Restart the network service:

[root@linuxcloudy ~]# systemctl restart network [root@linuxcloudy ~]#

Step 7. Finally, verify the configuration:

[root@linuxcloudy ~]# ovs-vsctl show 8351a631-f1e7-43f5-a9ee-736f80778c43     Bridge "ovs-br0"         Port "ovs-br0"             Interface "ovs-br0"                 type: internal         Port "bond0"             Interface "bond0"     ovs_version: "2.3.1" [root@linuxcloudy ~]#

[root@linuxcloudy ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00     inet 127.0.0.1/8 scope host lo        valid_lft forever preferred_lft forever     inet6 ::1/128 scope host        valid_lft forever preferred_lft forever 2: ens34: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP group default qlen 1000     link/ether 00:0c:29:1b:86:76 brd ff:ff:ff:ff:ff:ff 3: ens33: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP group default qlen 1000     link/ether 00:0c:29:1b:86:76 brd ff:ff:ff:ff:ff:ff 4: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue master ovs-system state UP group default qlen 1000     link/ether 00:0c:29:1b:86:76 brd ff:ff:ff:ff:ff:ff     inet6 fe80::20c:29ff:fe1b:8676/64 scope link        valid_lft forever preferred_lft forever 5: ovs-system: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000     link/ether f2:6c:ff:1e:6e:a7 brd ff:ff:ff:ff:ff:ff 6: ovs-br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000     link/ether 00:0c:29:1b:86:76 brd ff:ff:ff:ff:ff:ff     inet 192.168.43.105/24 brd 192.168.43.255 scope global ovs-br0        valid_lft forever preferred_lft forever     inet6 2405:204:3126:fccb:20c:29ff:fe1b:8676/64 scope global mngtmpaddr dynamic        valid_lft 3388sec preferred_lft 3388sec     inet6 fe80::20c:29ff:fe1b:8676/64 scope link        valid_lft forever preferred_lft forever [root@linuxcloudy ~]#

[root@linuxcloudy ~]# ping -c4 192.168.43.1 PING 192.168.43.1 (192.168.43.1) 56(84) bytes of data. 64 bytes from 192.168.43.1: icmp_seq=1 ttl=64 time=3.39 ms 64 bytes from 192.168.43.1: icmp_seq=2 ttl=64 time=2.66 ms 64 bytes from 192.168.43.1: icmp_seq=3 ttl=64 time=2.52 ms 64 bytes from 192.168.43.1: icmp_seq=4 ttl=64 time=2.71 ms --- 192.168.43.1 ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3007ms rtt min/avg/max/mdev = 2.525/2.824/3.395/0.338 ms [root@linuxcloudy ~]#

It’s done!!! OVS vSwitch with NIC bonding is configured.