RHEL / CentOS 7 Network Teaming
Below is an example on how to configure network teaming on RHEL/CentOS 7. It is assumed that you have at least two interface cards.
Show Current Network Interfaces
[root@rhce-server ~]$ ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eno16777736: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT qlen 1000
link/ether 00:0c:29:69:bf:87 brd ff:ff:ff:ff:ff:ff
3: eno33554984: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT qlen 1000
link/ether 00:0c:29:69:bf:91 brd ff:ff:ff:ff:ff:ff
The two devices I will be teaming are eno33554984 and eno16777736.
Create the Team Interface
[root@rhce-server ~]$ nmcli connection add type team con-name team0 ifname team0 config ‘{“runner”: {“name”: “activebackup”}}’
This will configure the interface for activebackup. Other runners include broadcast, roundrobin, loadbalance, and lacp.
Configure team0’s IP Address
[root@rhce-server ~]# nmcli connection modify team0 ipv4.addresses 192.168.1.22/24
[root@rhce-server ~]# nmcli connection modify team0 ipv4.method manual
You can also configure IPv6 address by setting the ipv6.addresses field.
Configure the Team Slaves
[root@rhce-server ~]# nmcli connection add type team-slave con-name team0-slave1 ifname eno33554984 master team0
Connection ‘team0-slave1’ (4167ea50-7d3a-4024-98e1-3058a4dcf0fa) successfully added.
[root@rhce-server ~]# nmcli connection add type team-slave con-name team0-slave2 ifname eno16777736 master team0
Connection ‘team0-slave2’ (d5ed65d1-16a7-4bc7-8c4d-78e17a1ed8b3) successfully added.
Check the Connection
[root@rhce-server ~]# teamdctl team0 state
setup:
runner: activebackup
ports:
eno16777736
link watches:
link summary: up
instance[link_watch_0]:
name: ethtool
link: up
eno33554984
link watches:
link summary: up
instance[link_watch_0]:
name: ethtool
link: up
runner:
active port: eno16777736
[root@rhce-server ~]# ping -I team0 192.168.1.1
PING 192.168.1.1 (192.168.1.1) from 192.168.1.24 team0: 56(84) bytes of data.
64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=1.38 ms
…
Test Failover
[root@rhce-server ~]# nmcli device disconnect eno16777736
[root@rhce-server ~]# teamdctl team0 state
setup:
runner: activebackup
ports:
eno33554984
link watches:
link summary: up
instance[link_watch_0]:
name: ethtool
link: up
runner:
active port: eno33554984
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