Linux uses dual network card bond and screwdriver interface

What is bond

NIC bond is a technology that is commonly used in production scenarios. It combines multiple NICs into one logical NIC to achieve local NIC redundancy, bandwidth expansion, and load balancing.

Applicable scenarios

The two network cards of the server need to be bonded, and after bonding, the network cards need to be configured with addresses of different network segments to carry different traffic. At this time, the sub-interface method can be used.

Experimental scenario

equipment

Server: Server_A
Core switches: Switch_A, Switch_B

Switch connection mode: stacking

Server network card: enp176s0f0, enp176s0f1 as bond

IP segmentation

Business segment
VLAN 201: 10.10.51.0/24
Public Network
VLAN 401: 111.20.200.88/27

Require

The two core switches Switch_A and Switch_B connected to server Server_A are stacked. The enp176s0f0 and enp176s0f1 optical ports of Server_A are interconnected with Switch_A and Switch_B respectively. It is now required that enp176s0f0 and enp176s0f1 be bonded, the address 10.10.51.16 carries business traffic, the address 111.20.200.90 carries public network traffic, and the switch ports are bound as eth-trunk and transparently transmit VLAN201 and VLAN401.

Network card configuration script

# Stop the NetworkManager service systemctl stop NetworkManager.service 
systemctl disable NetworkManager.service

# Backup cp /etc/sysconfig/network-scripts/ifcfg-enp176s0f0{,.bak}
cp /etc/sysconfig/network-scripts/ifcfg-enp176s0f1{,.bak}

# Change the network card protocol to none and start the device automatically without powering on, and configure dual network cards sed -i 's/BOOTPROTO=dhcp/BOOTPROTO=none/' /etc/sysconfig/network-scripts/ifcfg-enp176s0f0
sed -i 's/ONBOOT=no/ONBOOT=yes/' /etc/sysconfig/network-scripts/ifcfg-enp176s0f0
echo "MASTER=bond0" >>/etc/sysconfig/network-scripts/ifcfg-enp176s0f0
echo "SLAVE=yes" >>/etc/sysconfig/network-scripts/ifcfg-enp176s0f0

sed -i 's/BOOTPROTO=dhcp/BOOTPROTO=none/' /etc/sysconfig/network-scripts/ifcfg-enp176s0f1
sed -i 's/ONBOOT=no/ONBOOT=yes/' /etc/sysconfig/network-scripts/ifcfg-enp176s0f1
echo "MASTER=bond0" >>/etc/sysconfig/network-scripts/ifcfg-enp176s0f1
echo "SLAVE=yes" >>/etc/sysconfig/network-scripts/ifcfg-enp176s0f1

# Configure network card bond0
echo "DEVICE=bond0
TYPE=Ethernet
ONBOOT=yes
BOOTPROTO=static" >/etc/sysconfig/network-scripts/ifcfg-bond0

# Write module file, bond mode is mode 0
echo "alias bond0 bonding
options bond0 miimon=100 mode=0" >/etc/modprobe.d/bond.conf
# Load module modprobe bonding

# Screwdriver interface bond0.201
echo "DEVICE=bond0.201
TYPE=Vlan
PHYSDEV=bond0
ONBOOT=yes
BOOTPROTO=static
REORDER_HDR=yes
IPADDR=10.10.51.16
GATEWAY=10.10.51.1
NETMASK=255.255.255.0
DNS1=114.114.114.114
DNS2=8.8.8.8
VLAN=yes
VLAN_ID=201" >/etc/sysconfig/network-scripts/ifcfg-bond0.201

# Screwdriver interface bond0.401
echo "DEVICE=bond0.401
TYPE=Vlan
PHYSDEV=bond0
ONBOOT=yes
BOOTPROTO=static
REORDER_HDR=yes
IPADDR=111.20.200.90
GATEWAY=111.20.200.89
NETMASK=255.255.255.0
DNS1=114.114.114.114
DNS2=8.8.8.8
VLAN=yes
VLAN_ID=401" >/etc/sysconfig/network-scripts/ifcfg-bond0.401

# Load the module and restart the host modprobe 8021q
reboot

Key Points

If the switch side starts with eth-trunk, the server side must start with a sub-interface

The switch side and the server side should either both enable lacp negotiation or not, otherwise the ports will be different.

Example for configuring the eth-trunk port on the switch

[HH2B108-H01-2-HW9006X-SW001-Eth-Trunk12]display this 
#
interface Eth-Trunk12
port link-type trunk
port trunk allow-pass vlan 201 401
#
return

The server side starts the LACP protocol using bond mode 4. The example is as follows

 # more /etc/modprobe.d/bond.conf
 alias bond0 bonding
 options bond0 miimon=100 mode=4 lacp_rate=1

The VLAN number in "DEVICE=bond0.401" in the sub-interface configuration file must be consistent with the VLAN number that needs to be transparently transmitted.

After configuring the sub-interface, you must restart the server for it to take effect! ! !

Summarize:

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