Help Center> Bare Metal Server> User Guide> Network> Enhanced High-Speed Network> Configuring an Enhanced High-Speed NIC (Red Hat, CentOS, Oracle Linux, and EulerOS)
Updated on 2022-09-16 GMT+08:00
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Configuring an Enhanced High-Speed NIC (Red Hat, CentOS, Oracle Linux, and EulerOS)

This section uses CentOS 6.9 (x86_64) as an example to describe how to configure an enhanced high-speed NIC of a BMS.

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

Add a NIC

Use a key or password to log in to the BMS as user root. Run the following command:

blkid | grep config-2

If the command output is empty, use Method 2. If the command output shown in the following figure is displayed, use Method 1.

  • Method 1
  1. Use a key or password to log in to the BMS as user root.
  2. On the BMS CLI, run the following command to check the NIC information:

    ip link

    Information similar to the following is displayed.

    eth0 and eth1 bear the VPC, and eth2 and eth3 bear the enhanced high-speed network.

  3. 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.

  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

    If the /etc/udev/rules.d/70-persistent-net.rules file does not exist, create it with the content in the following format:

    SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="4c:f9:5d:d9:e8:ac", NAME="eth0"
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="4c:f9:5d:d9:e8:ad", NAME="eth1"

  5. 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.

    Ensure that NIC MAC address and name are lowercase letters.

    vi /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.

  6. 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-eth2 and /etc/sysconfig/network/ ifcfg-eth3 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-eth2

    cp -p /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth3

  7. Run the following commands to edit the /etc/sysconfig/network-scripts/ifcfg-eth2 and /etc/sysconfig/network-scripts/ifcfg-eth3 files:

    • vi /etc/sysconfig/network-scripts/ifcfg-eth2

      Edit the eth2 network configuration file as follows:

      USERCTL=no
MTU=8888
NM_CONTROLLED=no
BOOTPROTO=static
DEVICE=eth2
TYPE=Ethernet
ONBOOT=yes
MASTER=bond1
SLAVE=yes

      Change the value of BOOTPROTO to static, that of DEVICE to the network device name eth2, and that of MASTER to the port name of the enhanced high-speed NIC bond (bond1). Retain values of other parameters.

    • vi /etc/sysconfig/network-scripts/ifcfg-eth3

      Edit the eth3 network configuration file as follows (similar to eth2):

      USERCTL=no
MTU=8888
NM_CONTROLLED=no
BOOTPROTO=static
DEVICE=eth3
TYPE=Ethernet
ONBOOT=yes
MASTER=bond1
SLAVE=yes

  8. Run the following command to edit the /etc/sysconfig/network-scripts/ifcfg-bond1 file:

    vi /etc/sysconfig/network-scripts/ifcfg-bond1

    Edit the file as follows:

    MACADDR=40:7d:0f:52:e3:a5
BONDING_MASTER=yes
USERCTL=no
ONBOOT=yes
NM_CONTROLLED=no
BOOTPROTO=static
BONDING_OPTS="mode=1 miimon=100"
DEVICE=bond1
TYPE=Bond
IPADDR=10.10.10.101
NETMASK=255.255.255.0
MTU=8888

    Where,

    • Change the value of MACADDR to the MAC address of eth2 or eth3.
    • 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 enhanced high-speed network does not conflict with the VPC network segment, you can plan the IP address as needed, only to ensure that BMSs communicating through the enhanced high-speed network are in the same network segment as the enhanced high-speed network. An example value is 10.10.10.101.
    • Set the value of NETMASK to the subnet mask of the IP address configured for enhanced high-speed network bond1.

    Retain values of other parameters.

    After the modification, press Esc, enter :wq, save the configuration, and exit.

  9. Run the following commands to enable port group bond1 of the enhanced high-speed network:

    Run the following commands to start enhanced high-speed NICs eth2 and eth3:

    ifup eth2

    ifup eth3

    ifup bond1

  10. Perform the preceding operations to configure other BMSs.
  11. After all BMSs are configured, ping the IP address in the same network segment as the enhanced high-speed network of other BMSs from each BMS.

  • Method 2
  1. Use a key or password to log in to the BMS as user root.
  2. On the BMS CLI, run the following command to check the NIC information:

    ip link

    Information similar to the following is displayed.

    The NIC whose MAC address starts with fa:16 is a network device that carries the VPC network, for example, eth0 and eth1. The NIC whose MAC address is that displayed in View Enhanced High-Speed NICs is a network device that carries the enhanced high-speed network, such as eth6 and eth7.

  3. Run the following commands to edit the /etc/sysconfig/network-scripts/ifcfg-eth6 and /etc/sysconfig/network-scripts/ifcfg-eth7 files:

    • vi /etc/sysconfig/network-scripts/ifcfg-eth6

      Edit the eth6 network configuration file as follows:

      USERCTL=no
MTU=8888
NM_CONTROLLED=no
BOOTPROTO=static
DEVICE=eth6
TYPE=Ethernet
ONBOOT=yes
MASTER=bond1
SLAVE=yes

      Change the value of BOOTPROTO to static, that of DEVICE to the network device name eth6, and that of MASTER to the port name of the enhanced high-speed NIC bond (bond1). Retain values of other parameters.

    • vi /etc/sysconfig/network-scripts/ifcfg-eth7

      Edit the eth7 network configuration file as follows (similar to eth6):

      USERCTL=no
MTU=8888
NM_CONTROLLED=no
BOOTPROTO=static
DEVICE=eth7
TYPE=Ethernet
ONBOOT=yes
MASTER=bond1
SLAVE=yes

  4. Run the following command to edit the /etc/sysconfig/network-scripts/ifcfg-bond1 file:

    vi /etc/sysconfig/network-scripts/ifcfg-bond1

    Edit the file as follows:

    MACADDR=00:2e:c7:e0:b2:37
BONDING_MASTER=yes
USERCTL=no
ONBOOT=yes
NM_CONTROLLED=no
BOOTPROTO=static
BONDING_OPTS="mode=1 miimon=100"
DEVICE=bond1
TYPE=Bond
IPADDR=10.10.10.101
NETMASK=255.255.255.0
MTU=8888

    Where,

    • Change the value of MACADDR to the MAC address of eth6 or eth7.
    • 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 enhanced high-speed network does not conflict with the VPC network segment, you can plan the IP address as needed, only to ensure that BMSs communicating through the enhanced high-speed network are in the same network segment as the enhanced high-speed network. An example value is 10.10.10.101.
    • Set the value of NETMASK to the subnet mask of the IP address configured for enhanced high-speed network bond1.

    Retain values of other parameters.

    After the modification, press Esc, enter :wq, save the configuration, and exit.

  5. Run the following commands to enable port group bond1 of the enhanced high-speed network:

    Run the following commands to start enhanced high-speed NICs eth6 and eth7:

    ifup eth6

    ifup eth7

    ifup bond1

  6. Perform the preceding operations to configure other BMSs.
  7. After all BMSs are configured, ping the IP address in the same network segment as the enhanced high-speed network of other BMSs from each BMS.

To configure a VLAN, perform the following steps:

  1. Configure the corresponding VLAN sub-interfaces based on the VLAN to be configured. Assuming that the VLAN ID is 316, run the following command to edit the /etc/sysconfig/network-scripts/ifcfg-bond1.316 file:

    vi /etc/sysconfig/network-scripts/ifcfg-bond1.316

    Edit the file as follows:

    USERCTL=no
ONBOOT=yes
NM_CONTROLLED=no
BOOTPROTO=static
DEVICE=bond1.316
TYPE=Ethernet
IPADDR=10.10.0.101
NETMASK=255.255.255.0
VLAN=yes
PHYSDEV=bond1

    Where,

    • Change the value of DEVICE to the name of the new bond sub-interface.
    • Change the value of IPADDR to the IP address to be allocated to bond1.316. If the IP address planned for the VLAN sub-interface of the enhanced high-speed NIC does not conflict with the VPC network segment, you can plan the IP address as needed, only to ensure that the BMSs communicating with each other through the VLAN sub-interface of the enhanced high-speed NIC are in the same network segment as the VLAN sub-interface of the enhanced high-speed NIC. An example value is 10.10.0.101.
    • Set the value of NETMASK to the subnet mask of the IP address configured for enhanced high-speed NIC bond1.316.

    Retain values of other parameters.

    After the modification, press Esc, enter :wq, save the configuration, and exit.

  2. After all BMSs are configured, ping the IP address in the same network segment as the enhanced high-speed network VLAN sub-interface of other BMSs from each BMS.

Delete a NIC

  1. Obtain the IP address of the bonded enhanced high-speed NIC to be deleted.
  2. Use a key or password to log in to the BMS as user root.
  3. Locate the bond network device and run the following command to stop and delete the device: If the bond has VLAN sub-interfaces, they will be automatically deleted.
    [root@bms-centos ~]# ifdown eth2
[root@bms-centos ~]# ifdown eth3
[root@bms-centos ~]# ifdown bond1
[root@bms-centos ~]# ip link delete bond1
[root@bms-centos ~]# ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 8888 qdisc mq master bond0 state UP qlen 1000
    link/ether fa:16:00:6d:80:29 brd ff:ff:ff:ff:ff:ff
3: eth1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 8888 qdisc mq master bond0 state UP qlen 1000
    link/ether fa:16:00:6d:80:29 brd ff:ff:ff:ff:ff:ff
4: eth2: <BROADCAST,MULTICAST> mtu 8888 qdisc mq state DOWN qlen 1000
    link/ether 40:7d:0f:52:e3:a5 brd ff:ff:ff:ff:ff:ff
5: eth3: <BROADCAST,MULTICAST> mtu 8888 qdisc mq state DOWN qlen 1000
    link/ether 40:7d:0f:52:e3:a6 brd ff:ff:ff:ff:ff:ff
6: bond0: <BROADCAST,MULTICAST,PROMISC,MASTER,UP,LOWER_UP> mtu 8888 qdisc noqueue state UP 
    link/ether fa:16:00:6d:80:29 brd ff:ff:ff:ff:ff:ff
  4. Run the following commands to delete network configuration files /etc/sysconfig/network-scripts/ifcfg-eth2, /etc/sysconfig/network-scripts/ifcfg-eth3, and /etc/sysconfig/network-scripts/ifcfg-bond1:

    rm -f /etc/sysconfig/network-scripts/ifcfg-eth2

    rm -f /etc/sysconfig/network-scripts/ifcfg-eth3

    rm -f /etc/sysconfig/network-scripts/ifcfg-bond1

    If a VLAN sub-interface exists, delete network configuration file /etc/sysconfig/network-scripts/ifcfg-bond1.vlan, where vlan indicates the VLAN ID of the VLAN sub-interface, for example, 316.

    rm -f /etc/sysconfig/network-scripts/ifcfg-bond1.316