Linux Bonding

Install modules

sudo modprobe bonding
lsmod | grep bond
sudo apt-get install ifenslave

Temporary testing

To create a bond interface composed of the first two physical NCs in your system, issue the below command. However this method of creating bond interface is ephemeral and DOES NOT survive system reboot.

sudo ip link add bond0 type bond mode 802.3ad
sudo ip link set eth0 master bond0
sudo ip link set eth1 master bond0

Permanant configuration

To create a permanent bond interface, use the method to manually edit interfaces configuration file. Details about the bond interface can be obtained by displaying the content of the below kernel file using cat command as shown.

nano /etc/netplan/01-netcfg.yaml

cat /etc/netplan/01-netcfg.yaml

Access port

root@R107-U04:/home/ba# cat /etc/netplan/01-netcfg.yaml
# This file describes the network interfaces available on your system
# For more information, see netplan(5).
network:
  bonds:
    bond0:
      dhcp4: yes
      interfaces:
      - eno2
      - eno3
      parameters:
        lacp-rate: fast
        mii-monitor-interval: 100
        min-links: 1
        mode: 802.3ad
        transmit-hash-policy: layer3+4
  version: 2
  renderer: networkd
  ethernets:
    eno1:
      dhcp4: yes
      dhcp-identifier: mac
    eno2:
      dhcp4: false
    eno3:
      dhcp4: false

Access port with route

root@R107-U04:/home/ba# cat /etc/netplan/01-netcfg.yaml 
# This file describes the network interfaces available on your system
# For more information, see netplan(5).
network:
  bonds:
    bond0:
      dhcp4: false
      interfaces:
      - eno2
      - eno3
      addresses: [10.30.15.168/26]
      routes:
      - to: 10.50.101.0/24
        via: 10.30.15.129
      parameters:
        lacp-rate: fast
        mii-monitor-interval: 100
        min-links: 1
        mode: 802.3ad
        transmit-hash-policy: layer3+4    
  version: 2
  renderer: networkd
  ethernets:
    eno1:
      dhcp4: yes
      dhcp-identifier: mac
    eno2:
      dhcp4: false
    eno3:
      dhcp4: false

Trunk port

network:
  bonds:
    bond0:
      dhcp4: false
      interfaces:
      - eno2
      - eno3
      parameters:
        lacp-rate: fast
        mii-monitor-interval: 100
        min-links: 1
        mode: 802.3ad
        transmit-hash-policy: layer3+4
    
  version: 2
  renderer: networkd
  ethernets:
    eno1:
      dhcp4: yes
      dhcp-identifier: mac
    eno2:
      dhcp4: false
    eno3:
      dhcp4: false
    
  vlans:
    bond0.1021:
      addresses: [192.168.100.168/24]
      dhcp4: false
      id: 1021
      link: bond0
      routes:
      - scope: link
        table: 11
        to: 10.30.15.128/26
      - table: 11
        to: 10.50.101.0/24
        via: 10.30.15.129
      routing-policy:
      - from: 10.30.15.168
        priority: 1
        table: 11
    bond0.1022:
      critical: false
      dhcp-identifier: mac
      dhcp4: true
      dhcp4-overrides:
        send-hostname: false
        use-hostname: false
      dhcp6: false
      id: 1022
      link: bond0

Change Transmit Hash

If the Transmit Hash Policy is changed, to reboot the Ubuntu for the new policy taking effect.

Before rebooting

root@R107-U04:/home/ba# cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)
    
Bonding Mode: IEEE 802.3ad Dynamic link aggregation
Transmit Hash Policy: layer2 (0)
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 200
Down Delay (ms): 200
Peer Notification Delay (ms): 0
    
802.3ad info
LACP rate: slow
Min links: 0
Aggregator selection policy (ad_select): stable
System priority: 65535
System MAC address: 78:ac:44:9e:52:f2
Active Aggregator Info:
        Aggregator ID: 1
        Number of ports: 2
        Actor Key: 15
        Partner Key: 3
        Partner Mac Address: 00:01:02:03:04:05
    
Slave Interface: eno3
MII Status: up
Speed: 10000 Mbps
Duplex: full
Link Failure Count: 9
Permanent HW addr: 78:ac:44:9e:52:f2
Slave queue ID: 0
Aggregator ID: 1
Actor Churn State: none
Partner Churn State: none
Actor Churned Count: 0
Partner Churned Count: 0
details actor lacp pdu:
    system priority: 65535
    system mac address: 78:ac:44:9e:52:f2
    port key: 15
    port priority: 255
    port number: 1
    port state: 61
details partner lacp pdu:
    system priority: 127
    system mac address: 00:01:02:03:04:05
    oper key: 3
    port priority: 127
    port number: 3
    port state: 63
    
Slave Interface: eno2
MII Status: up
Speed: 10000 Mbps
Duplex: full
Link Failure Count: 12
Permanent HW addr: 78:ac:44:9e:52:f1
Slave queue ID: 0
Aggregator ID: 1
Actor Churn State: churned
Partner Churn State: churned
Actor Churned Count: 1
Partner Churned Count: 1
details actor lacp pdu:
    system priority: 65535
    system mac address: 78:ac:44:9e:52:f2
    port key: 15
    port priority: 255
    port number: 2
    port state: 61
details partner lacp pdu:
    system priority: 127
    system mac address: 00:01:02:03:04:05
    oper key: 3
    port priority: 127
    port number: 32769
    port state: 63

Rebooting

root@R107-U04:/# shutdown -r now

After rebooting

ba@R107-U04:~$ cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)
  
Bonding Mode: IEEE 802.3ad Dynamic link aggregation
Transmit Hash Policy: layer3+4 (1)
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0
Peer Notification Delay (ms): 0
  
802.3ad info
LACP rate: fast
Min links: 1
Aggregator selection policy (ad_select): stable
  
Slave Interface: eno3
MII Status: up
Speed: 10000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 78:ac:44:9e:52:f2
Slave queue ID: 0
Aggregator ID: 1
Actor Churn State: none
Partner Churn State: none
Actor Churned Count: 0
Partner Churned Count: 0
  
Slave Interface: eno2
MII Status: up
Speed: 10000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 78:ac:44:9e:52:f1
Slave queue ID: 0
Aggregator ID: 1
Actor Churn State: none
Partner Churn State: none
Actor Churned Count: 0
Partner Churned Count: 0

To check the packets

root@R107-U04:/# tcpdump -i eno2 icmp
root@R107-U04:/# tcpdump -i eno3 icmp 

Links

How to Configure Network Bonding or Teaming in Ubuntu

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