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Configure Network Bonding

2022/06/29

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

The Network Teaming 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 modes for configuring network bonding like follows.

Mode	Mode Name	Description
0	balance-rr	Sets a round-robin policy for fault tolerance and load balancing. Transmissions are received and sent out sequentially on each bonded member interface beginning with the first one available.
1	active-backup	Sets an active-backup policy for fault tolerance. Transmissions are received and sent out via the first available bonded member interface. Another bonded member interface is only used if the active bonded member interface fails.
2	balance-xor	Sets an XOR (exclusive-or) policy for fault tolerance and load balancing. Using this method, the interface matches up the incoming request's MAC address with the MAC address for one of the member NICs. Once this link is established, transmissions are sent out sequentially beginning with the first available interface.
3	broadcast	Sets a broadcast policy for fault tolerance. All transmissions are sent on all member interfaces.
4	802.3ad	Sets an IEEE 802.3ad dynamic link aggregation policy. Creates aggregation groups that share the same speed and duplex settings. Transmits and receives on all members in the active aggregator. Requires a switch that is 802.3ad compliant.
5	balance-tlb	Sets a Transmit Load Balancing (TLB) policy for fault tolerance and load balancing. The outgoing traffic is distributed according to the current load on each member interface. Incoming traffic is received by the current member NIC. If the receiving member fails, another member takes over the MAC address of the failed member.
6	balance-alb	Sets an Active Load Balancing (ALB) policy for fault tolerance and load balancing. Includes transmit and receive load balancing for IPV4 traffic. Receive load balancing is achieved through ARP negotiation.

[1]

List of phisical network interfaces int the host:

ifconfig | grep enp | awk '{print $1}' | sed 's/.$//'

Configure Network Bonding.

# 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' (0c5a95c5-1c2a-351d-add2-7fee398c96ab) successfully deleted.

[root@dlp ~]# nmcli device

DEVICE TYPE STATE CONNECTION

enp1s0 ethernet disconnected --

enp7s0 ethernet disconnected --

lo loopback unmanaged --

# add a new bonding device [bond0] (any name you like)
# refer to the description above for each mode (OK to specify with mode number for [mode=*])

[root@dlp ~]# nmcli connection add type bond ifname bond0 con-name bond0 bond.options "mode=balance-rr"

Connection 'bond0' (c0c1097e-476e-4c5c-ac5a-3284fb053ce8) successfully added.

# add member devices to the bonding device

[root@dlp ~]# nmcli connection add type ethernet ifname enp1s0 master bond0

Connection 'bond-slave-enp1s0' (0e799b5a-cc8d-4062-bf0d-927c080863ff) successfully added.
[root@dlp ~]# nmcli connection add type ethernet ifname enp7s0 master bond0

[root@dlp ~]# nmcli connection modify boond0 ipv4.method disabled

Connection 'bond-slave-enp7s0' (d4a65fb1-9a77-40bd-b8be-aa88ce64cc5f) successfully added.

[root@dlp ~]# nmcli device

DEVICE TYPE STATE CONNECTION

bond0 bond connected bond0

enp1s0 ethernet connected bond-slave-enp1s0

enp7s0 ethernet connected bond-slave-enp7s0

lo loopback unmanaged --

[root@dlp ~]# nmcli connection

NAME UUID TYPE DEVICE

bond0 c0c1097e-476e-4c5c-ac5a-3284fb053ce8 bond bond0

bond-slave-enp1s0 0e799b5a-cc8d-4062-bf0d-927c080863ff ethernet enp1s0