How to Re-name Network Interface in Linux and Configuring Network Bonding or NIC Teaming

Re-naming Network Interface and Configuring Network Bonding or NIC Teaming in CentOS 7|RedHat 7 Linux

1. Previous versions of linux will have interface name like eth0 and eth1 and CentOS 7 later versions will have enp2s0f0  like that. but if you would like to rename  then follow the below steps.

1. Edit file /etc/default/grub and add following

# GRUB_CMDLINE_LINUX="crashkernel=auto rd.lvm.lv=centos/root rd.lvm.lv=centos/swap net.ifnames=0 biosdevnames=0 rhgb quiet"

2. Regenerate a GRUB configuration file

# grub2-mkconfig -o /boot/grub2/grub.cfg

3. Edit NAME and DEVICE parameter in ifcfg file /etc/sysconfig/network-scripts

# mv ifcfg-enp2s0f0 ifcfg-eth0 
# mv ifcfg-enp2s0f1 ifcfg-eth1
# mv ifcfg-ens1f0 ifcfg-eth2
# mv ifcfg-ens1f1 ifcfg-eth3
# mv ifcfg-ens2f0 ifcfg-eth4
# mv ifcfg-ens2f1 ifcfg-eth5

4. Edit NAME and DEVICE parameter in ficfg file

# vi ifcfg-eth0 and rename NAME and DEVICE to eth0. similarly for all ifcfg-eth*

# systemctl disable NetworkManager

5. Then reboot the server to apply the changes.

# Shutdown -r now 

Configuring Network Bonding or Teaming:

1. Edit and update each of the all physical NIC per below configuration.

# [] ifcfg-eth0 - kickstart interface

	TYPE=Ethernet
	PROXY_METHOD=none
	BROWSER_ONLY=no
	BOOTPROTO=dhcp
	DEFROUTE=yes
	IPV4_FAILURE_FATAL=no
	IPV6INIT=yes
	IPV6_AUTOCONF=yes
	IPV6_DEFROUTE=yes
	IPV6_FAILURE_FATAL=no
	IPV6_ADDR_GEN_MODE=stable-privacy
	NAME=eth0
	UUID=1c126857-adca-436d-8ffe-5cf1a6497937
	DEVICE=eth0
	ONBOOT=no
	
        
  
	     [] ifcfg-bond0 - Bonging interface [Master]
	
	DEVICE=bond0
	BONDING_OPTS="mode=4 miimon=100 updelay=6000 lacp_rate1"
	BONDING_MASTER=yes
	BOOTPROTO=none
	NM_CONTROLLED=no
	IPV6INIT=no
	NAME=bond0
	ONBOOT=0
	   
	    [] ifcfg-bond0.351
	
	DEVICE=bond0.351
	BOOTPROTO=none
	IPADDR=192.168.46.131
	NETMASK=255.255.255.0
	DOMAIN="acg.com corp.acg.com"
	GATEWAY=192.168.46.1
	DNS1=192.168.24.30
	DNS2=192.168.25.30
	ONBOOT=yes
	NM_CONTROLLED=no
	IPV6INIT=no
	NAME=bond0.351
	VLAN=yes
	
	     [] ifcfg-eth1 - Slave interface
	
	TYPE=Ethernet
	IPV6INIT=NO
	NAME=eth1
	UUID=1a008bd9-f21d-42f9-905e-c5dc09f87745
	DEVICE=eth1
	ONBOOT=yes
	MASTER=bond0
	SLAVE=yes
	NM_CONTROLLED=no
	
	    [] ifcfg-eth2 - Slave interface
	
	TYPE=Ethernet
	IPV6INIT=no
	NAME=eth2
	UUID=9233e629-70a0-49cb-9f1d-b7deb39b1571
	DEVICE=eth2
	ONBOOT=yes
	MASTER=bond0
	SLAVE=yes
	NM_CONTROLLED=no
	
	    [] ifcfg-eth3 - iSCSI interface [Physical]
	
	TYPE=Ethernet
	BOOTPROTO=none
	IPV6INIT=no
	NAME=eth3
	UUID=8c233834-8d55-4071-9890-839989c15f85
	DEVICE=eth3
	ONBOOT=yes
	NM_CONTROLLED=no
	
	    [] ifcfg-eth3.705 - iSCSI interface
	
	DEVICE=eth3.705
	BOOTPROTO=none
	ONBOOT=yes
	IPADDR=172.16.5.131
	PREFIX=24
	NETWORK=172.16.5.0
	VLAN=yes
	
	
	    [] ifcfg-eth4 - iSCSI interface [Physical]
	
	TYPE=Ethernet
	BOOTPROTO=none
	IPV6INIT=no
	NAME=eth4
	UUID=9f5656af-ef5d-4073-a85f-856a3bcd1c17
	DEVICE=eth4
	ONBOOT=yes
	NM_CONTROLLED=no
	
	    [] ifcfg-eth4.706 - iSCSI interface
	
	DEVICE=eth4.706
	BOOTPROTO=none
	ONBOOT=yes
	IPADDR=172.16.6.131
	PREFIX=24
	NETWORK=172.16.6.0
	VLAN=yes
	
	    [] ifcfg-eth5
	
	TYPE=Ethernet
	PROXY_METHOD=none
	BROWSER_ONLY=no
	BOOTPROTO=dhcp
	DEFROUTE=yes
	IPV4_FAILURE_FATAL=no
	IPV6INIT=yes
	IPV6_AUTOCONF=yes
	IPV6_DEFROUTE=yes
	IPV6_FAILURE_FATAL=no
	IPV6_ADDR_GEN_MODE=stable-privacy
	NAME=eth5
	UUID=7aafaebe-dad8-4bfd-a778-f1a8e8f143b0
	DEVICE=eth5
	ONBOOT=no

2. Restart the server or network service

# systemctl restart network

October 07, 2021 Tags : Linux

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