Configuring a User-defined VLAN (Red Hat, CentOS, Oracle Linux, and EulerOS)¶

This section uses CentOS 6.8 (x86_64) as an example to describe how to configure a user-defined VLAN for BMSs.

Note

The configuration methods of Red Hat, Oracle Linux, EulerOS, and CentOS are similar.

Use a key or password to log in to the BMS as user root.
On the BMS CLI, run the following command to check the NIC information:
ip link
Information similar to the following is displayed.
Note
Among the devices, eth0 and eth1 bear the VPC, and eth3 and eth5 bear the user-defined VLAN.
Run the following command to check whether the /etc/udev/rules.d/ directory contains the 80-persistent-net.rules file:
ll /etc/udev/rules.d/ | grep 80-persistent-net.rules
- If yes, and the file contains all NICs except bond0 and lo obtained in step 2 and their MAC addresses, go to step 6.
- If no, go to step 4.
Run the following command to copy the /etc/udev/rules.d/70-persistent-net.rules file and name the copy as /etc/udev/rules.d/80-persistent-net.rules.
cp -p /etc/udev/rules.d/70-persistent-net.rules /etc/udev/rules.d/80-persistent-net.rules
Configure the udev rules:
Write the MAC addresses and names of NICs except eth0 and eth1 obtained in step 2 (those not contained in the /etc/udev/rules.d/70-persistent-net.rules file) to the /etc/udev/rules.d/80-persistent-net.rules file so that the names and sequence of NICs do not change after the BMS is restarted.
Note
Ensure that the NIC MAC address and name are lowercase letters.
vim /etc/udev/rules.d/80-persistent-net.rules
The modification result is as follows:
After the modification, press Esc, enter :wq, save the configuration, and exit.
Run the following commands to copy the network configuration file /etc/sysconfig/network-scripts/ifcfg-bond0 to generate the /etc/sysconfig/network-scripts/ifcfg-bond1 file, and copy the /etc/sysconfig/network-scripts/ifcfg-eth0 file to generate the /etc/sysconfig/network-scripts/ifcfg-eth3 and /etc/sysconfig/network/ ifcfg-eth5 files:
cp -p /etc/sysconfig/network-scripts/ifcfg-bond0 /etc/sysconfig/network-scripts/ifcfg-bond1
cp -p /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth3
cp -p /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth5
Run the following commands to edit the /etc/sysconfig/network-scripts/ifcfg-eth3 and /etc/sysconfig/network-scripts/ifcfg-eth5 files:
- vim /etc/sysconfig/network-scripts/ifcfg-eth3
  Edit the eth3 network configuration file as follows:
```
USERCTL=no
MTU=8888
NM_CONTROLLED=no
BOOTPROTO=static
DEVICE=eth3
TYPE=Ethernet
ONBOOT=yes
MASTER=bond1
SLAVE=yes
```
  Change the value of BOOTPROTO to static, that of DEVICE to the network device name eth3, and that of MASTER to the port name of the user-defined VLAN (bond1). Retain values of other parameters.
- vim /etc/sysconfig/network-scripts/ifcfg-eth5
  Edit the eth5 network configuration file as follows (similar to eth3):
```
USERCTL=no
MTU=8888
NM_CONTROLLED=no
BOOTPROTO=static
DEVICE=eth5
TYPE=Ethernet
ONBOOT=yes
MASTER=bond1
SLAVE=yes
```
Run the following command to edit the /etc/sysconfig/network-scripts/ifcfg-bond1 file:
vim /etc/sysconfig/network-scripts/ifcfg-bond1
Edit the file as follows:
```
MACADDR=f4:4c:7f:3f:da:07
BONDING_MASTER=yes
USERCTL=no
ONBOOT=yes
NM_CONTROLLED=no
BOOTPROTO=static
BONDING_OPTS="mode=1 miimon=100"
DEVICE=bond1
TYPE=Bond
IPADDR=10.10.10.3
NETMASK=255.255.255.0
MTU=8888
```
Where,
- Change the value of MACADDR to the MAC address of eth3 or eth5.
- Change the value of BOOTPROTO to static.
- Change the value of DEVICE to bond1.
- Change the value of IPADDR to the IP address to be allocated to bond1. If the IP address planned for the user-defined VLAN does not conflict with the VPC network segment, you can plan the IP address as needed, only to ensure that BMSs communicating through the user-defined VLAN are in the same network segment as the user-defined VLAN. An example value is 10.10.10.3.
- Set the value of NETMASK to the subnet mask of the IP address configured for bond1.
Retain values of other parameters.
After the modification, press Esc, enter :wq, save the configuration, and exit.

Run the following command to enable port group bond1 of the user-defined VLAN:

ifup bond1

Determining if ip address 10.10.10.3 is already in use for device bond1...

Perform the preceding operations to configure other BMSs.
After all BMSs are configured, ping the IP addresses of other BMSs from each BMS.

last updated: 2024-05-18 00:28