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(Optional) Configuring Bond4

Bond4 refers to mode 4 in NIC bonding, technically designated as IEEE 802.3ad Link Aggregation or Link Aggregation Control Protocol (LACP). This configuration enhances bandwidth capacity and ensures redundancy by aggregating multiple physical NICs into a single logical interface.

Implementing bond4 requires coordinated configuration on both the server and network switch, with prerequisite knowledge of the physical ports of the switch corresponding to the two NICs of the server designated for bonding, and the switch IP address.

Configuring Dynamic LACP on the Switch

  1. Log in to the switch.
  2. Check all available physical interfaces on the switch.
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    display interface brief

    As shown in the figure, the ports on the switch corresponding to the two NICs (Eth1 and Eth2) to form the bond4 group on the server are in the up state and not part of any Eth-Trunk group. This example demonstrates bond4 configuration using ports 25GE1/0/33 and 25GE1/0/34.

  3. Configure Eth-Trunk12 to aggregate ports 25GE1/0/33 and 25GE1/0/34.
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    system-view 
interface Eth-Trunk 12 
mode lacp-dynamic 
trunkport 25GE 1/0/33 
trunkport 25GE 1/0/34 
commit 
quit 
  
interface 25GE 1/0/33 
eth-trunk 12 
commit 
quit 
  
interface 25GE 1/0/34 
eth-trunk 12 
commit 
quit

Configuring the Server

To configure NICs Eth1 and Eth2 as a bond4 interface, log in to the server and follow these steps.

  1. Log in to the server.
  2. Disable network connectivity for Eth1 and Eth2.
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    nmcli con down eth1 
nmcli con down eth2
  3. Back up the /etc/sysconfig/network-scripts/ifcfg-eth1 and /etc/sysconfig/network-scripts/ifcfg-eth2 configuration files for Eth1 and Eth2, and delete the original files.
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    cd /etc/sysconfig/network-scripts 
cp ifcfg-eth1 ifcfg-eth1.bak 
cp ifcfg-eth2 ifcfg-eth2.bak
rm -rf ifcfg-eth1
rm -rf ifcfg-eth2
  4. Create an 802.3ad-compliant bond4 interface using Eth1 and Eth2.
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    nmcli con add type bond con-name bond4 ifname bond4 mode 802.3ad 
nmcli con add type bond-slave ifname eth1 master bond4 
nmcli con add type bond-slave ifname eth2 master bond4 
nmcli con up bond-slave-eth1 
nmcli con up bond-slave-eth2 
nmcli con up bond4
  5. Modify the bond4 interface configuration file.
    1. Open the ifcfg-bond4 file. 
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      vi /etc/sysconfig/network-scripts/ifcfg-bond4
    2. Add an IP address and change BOOTPROTO=dhcp to BOOTPROTO=none. 
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      IPADDR=192.168.xx.xx 
NETMASK=255.255.255.0 
BOOTPROTO=none

    3. Press Esc to exit the insert mode. Type :wq! and press Enter to save the file and exit.
  6. Restart the network service and bond4 interface.
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    service NetworkManager restart 
nmcli con down bond4 
nmcli con up bond4
  7. Check network information about the bond4 interface.
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    ip a | grep -C 5 bond4  
ip a

  8. Check the bond4 interface status.
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    cat /proc/net/bonding/bond4

    The bond4 configuration is correct if the following conditions are met:

    • Bonding Mode is IEEE 802.3ad Dynamic link aggregation.
    • MII Status is up.
    • The servers use the bond4 IP address and can connect to each other.

Checking the Bond4 Configuration on the Switch

Following successful server-side bond4 setup, verify the Eth-Trunk12 configuration on the switch. 
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display eth-trunk 12

The bond4 configuration is correct if the following conditions are met:

  • Working Mode is Dynamic.
  • Operating Status is up.
  • Number Of Up Ports In Trunk is 2, and the command output contains information about 25GE1/0/33 and 25GE1/0/34.