Configure Network Teaming2021/12/09

Configure Network Teaming to bind multiple network interfaces into a single load balanced or fault-toleranced interface and so on.

The Network Bonding feature which is the same solution of network load-balancing or fault-tolerance is also provided.
Refer to the comparison of network teaming and bonding features below.

⇒ https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/networking_guide/sec-comparison_of_network_teaming_to_bonding

There are some runners (modes) for configuring network teaming like follows.

Runner	Description
roundrobin	Transmits data over all ports in turn.
activebackup	Transmits data over one port while the others are kept as a backup.
loadbalance	Transmits data over all ports with active Tx load balancing and Berkeley Packet Filter (BPF)-based Tx port selectors.
random	Transmits data on a randomly selected port.
lacp	Implements the 802.3ad Link Aggregation Control Protocol (LACP).
broadcast	Transmits data over all ports.

[1]

Configure Network Teaming.

# display network devices

[root@dlp ~]#

nmcli device

DEVICE  TYPE      STATE         CONNECTION
enp1s0  ethernet  connected     enp1s0
enp7s0  ethernet  disconnected  --
lo      loopback  unmanaged     --

# delete existing network connections

[root@dlp ~]#

nmcli connection delete enp1s0

Connection 'enp1s0' (c0ab6b8c-0eac-a1b4-1c47-efe4b2d1191f) successfully deleted.

[root@dlp ~]#

nmcli device

DEVICE  TYPE      STATE         CONNECTION
enp1s0  ethernet  disconnected  --
enp7s0  ethernet  disconnected  --
lo      loopback  unmanaged     --

# add a new teaming device [team0] (any name you like)
# refer to the description above for each runner

[root@dlp ~]#

nmcli connection add type team con-name team0 ifname team0 config '{"runner": {"name": "roundrobin"}}'

Connection 'team0' (6af49df1-4134-43b2-801b-5167593f9338) successfully added.

# add member devices to the teaming device

[root@dlp ~]#

nmcli connection add type team-slave con-name team0-slave0 ifname enp1s0 master team0

Connection 'team0-slave0' (5e5a6bb7-7a1b-4184-88c3-c837511a7b0f) successfully added.
[root@dlp ~]#

nmcli connection add type team-slave con-name team0-slave1 ifname enp7s0 master team0

Connection 'team0-slave1' (91d86c8a-5d47-4d53-896d-94428c6675dd) successfully added.

[root@dlp ~]#

nmcli device

DEVICE  TYPE      STATE      CONNECTION
team0   team      connected  team0
enp1s0  ethernet  connected  team0-slave0
enp7s0  ethernet  connected  team0-slave1
lo      loopback  unmanaged  --

[root@dlp ~]#

nmcli connection

NAME          UUID                                  TYPE      DEVICE
team0         6af49df1-4134-43b2-801b-5167593f9338  team      team0
team0-slave0  5e5a6bb7-7a1b-4184-88c3-c837511a7b0f  ethernet  enp1s0
team0-slave1  91d86c8a-5d47-4d53-896d-94428c6675dd  ethernet  enp7s0

# set IP address and so on to the teaming device and restart it
# IP address

[root@dlp ~]#

nmcli connection modify team0 ipv4.addresses 10.0.0.30/24

# gatway

[root@dlp ~]#

nmcli connection modify team0 ipv4.gateway 10.0.0.1

# DNS - specify with space separated if set multiple DNS servers

[root@dlp ~]#

nmcli connection modify team0 ipv4.dns "10.0.0.10 10.0.0.11"

# DNS search base - specify with space separated if set multiple domains

[root@dlp ~]#

nmcli connection modify team0 ipv4.dns-search "srv.world"

[root@dlp ~]#

nmcli connection modify team0 ipv4.method manual

[root@dlp ~]#

nmcli connection down team0 && nmcli connection up team0

Connection 'team0' successfully deactivated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/2)
Connection successfully activated (master waiting for slaves) (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/5)

# verify teaming state

[root@dlp ~]#

teamdctl team0 state

setup:
  runner: roundrobin
ports:
  enp1s0
    link watches:
      link summary: up
      instance[link_watch_0]:
        name: ethtool
        link: up
        down count: 0
  enp7s0
    link watches:
      link summary: up
      instance[link_watch_0]:
        name: ethtool
        link: up
        down count: 0

[root@dlp ~]#

ip address

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: enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master team0 state UP group default qlen 1000
    link/ether 52:54:00:65:52:ca brd ff:ff:ff:ff:ff:ff
3: enp7s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master team0 state UP group default qlen 1000
    link/ether 52:54:00:65:52:ca brd ff:ff:ff:ff:ff:ff permaddr 52:54:00:ff:86:42
5: team0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 52:54:00:65:52:ca brd ff:ff:ff:ff:ff:ff
    inet 10.0.0.30/24 brd 10.0.0.255 scope global noprefixroute team0
       valid_lft forever preferred_lft forever
    inet6 fe80::9540:27b:57f:e58e/64 scope link noprefixroute
       valid_lft forever preferred_lft forever

# configuration files are stored under the place

[root@dlp ~]#

ll /etc/sysconfig/network-scripts

total 12
-rw-r--r--. 1 root root 428 Dec  9 10:48 ifcfg-team0
-rw-r--r--. 1 root root 123 Dec  9 10:46 ifcfg-team0-slave0
-rw-r--r--. 1 root root 123 Dec  9 10:46 ifcfg-team0-slave1

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