Linux dual network card binding script method example

Linux dual network card binding script method example

In Linux operation and configuration work, dual network card binding is often used. The configuration of a few servers is fine, but if you need to configure dozens or even hundreds of servers, it will inevitably be boring and prone to errors. I have written this auxiliary script for dual network card binding, which can complete the Linux dual network card binding work in a fool-proof way. Of course, this script is mainly used for small-batch system configuration. If you need to configure a large number of servers, you can extract the bonding function in the script and make slight modifications. It's worth a try!

1. Scope of application

This shell script can create multiple bonded network cards in the following Linux systems, which is fine for production environments:

  • Redhat 5.x
  • CentOS 5.x
  • Kylin 3.x
  • KUX 2.x

2. Script features

----------------------------------------------
------ Network Configuration Assistant ------
----------------------------------------------

The information you have entered:

First NIC: eth0
Second NIC: eth1
bond name: bond1
IP address: 192.168.56.11
netmask :255.255.255.0
bonding_mode :mode=1
primary NIC :none
----------------------------------------------

Pls make sure it's OK[y/n]:y

As mentioned above, during the use of the script, it will prompt you to enter the name of the subnet card to be bound, the name of the bound network card, the IP address and subnet mask, the binding mode, whether to specify the primary network card, and actively identify and list the available network cards in the system for the user to choose. At the same time, it will judge the correctness of the input information to ensure the smooth binding of the dual network cards.

3. Instructions for use

First, upload the script to any directory on the Linux system and execute it as the root user:

[root@node1 tmp]# sh bonding_v2.0.sh 

----------------------------------------------
------ Network Configuration Assistant ------
----------------------------------------------

 
4 network cards available:
eth0 eth1 eth2 eth3
----------------------------------------------

Please enter the First NIC:_

First, the script will list the number of available network cards in the system and prompt you to enter the name of the first subnet card to be bound. Enter eth2 here.

There is no need to worry about input errors, duplicate input, etc. The script will automatically determine whether your input information is correct.

----------------------------------------------
------ Network Configuration Assistant ------
----------------------------------------------

4 network cards available:
eth0 eth1 eth2 eth3

The information you have entered:
First NIC: eth2
----------------------------------------------

Please select the second NIC:_

Then enter the name of the second network card to be bound, eth3. If you enter it incorrectly, a corresponding prompt will appear. For example, if you enter it incorrectly as eth8, you will be prompted to re-enter it:

----------------------------------------------
------ Network Configuration Assistant ------
----------------------------------------------

4 network cards available:
eth0 eth1 eth2 eth3

The information you have entered:
First NIC: eth2
----------------------------------------------

eth8 is not available, please enter another one.

Please select the second NIC:_

After correctly entering the second network card eth3 that needs to be bound, if there is no bound network card in the Linux system before, the default name of the first bound network card is bond0. If there is a bound network card in the system, the script will prompt you to enter bondN (N is a number):

----------------------------------------------
------ Network Configuration Assistant ------
----------------------------------------------

The information you have entered:
First NIC: eth2
Second NIC: eth3
bond name : bond0
----------------------------------------------

The default first bond name is -- bond0.

Please enter an IP address:_

Follow the prompts to enter the IP address you want to bind, such as 10.1.1.1

The script will automatically determine whether the input IP address format and range are correct, so you don't need to worry about input errors.

----------------------------------------------
------ Network Configuration Assistant ------
----------------------------------------------

The information you have entered:
First NIC: eth2
Second NIC: eth3
bond name : bond0
IP address : 10.1.1.1
----------------------------------------------

Pls enter the NETMASK[255.255.255.0]:_

After entering the IP address, you will be prompted to enter the subnet mask. The default is 255.255.255.0. Just press Enter. You can also enter a custom subnet mask.

----------------------------------------------
------ Network Configuration Assistant ------
----------------------------------------------

The information you have entered:
First NIC: eth2
Second NIC: eth3
bond name : bond0
IP address : 10.1.1.1
netmask : 255.255.255.0
----------------------------------------------

Pls enter the bonding_mode[default:mode=1,active-backup]:_

This step is to enter the network card binding level. The default is the master-slave mode: mode=1. Just press Enter. You can also enter a custom binding level (such as mode=6). The format is:

mode={0,1,2,3,4,5,6}

----------------------------------------------
------ Network Configuration Assistant ------
----------------------------------------------

The information you have entered:

First NIC: eth2
Second NIC: eth3
bond name: bond0
IP address: 10.1.1.1
netmask :255.255.255.0
bonding_mode :mode=1
----------------------------------------------

1-eth2
2-eth3
3-none
choose whether to set up the primary NIC or not[default:3-none]:_

At this time, the script prompts whether to set up a primary network card. The function of the primary network card is that when all sub-network cards are normal, the primary network card is prioritized to be active. Here, the default is not to set up a primary network card. You can also enter the number 1 or 2 to select a network card as the primary network card.

----------------------------------------------
------ Network Configuration Assistant ------
----------------------------------------------

The information you have entered:

First NIC: eth2
Second NIC: eth3
bond name: bond0
IP address: 10.1.1.1
netmask :255.255.255.0
bonding_mode :mode=1
primary NIC :none
----------------------------------------------

Pls make sure its OK[y/n]:_

At this point, all the information has been entered. The script will ask you to determine whether all the information you entered is correct. If it is correct, enter y and proceed to the next step. Otherwise, enter n and re-enter the above information.

----------------------------------------------
------ Network Configuration Assistant ------
----------------------------------------------

Complete!
File backup directory: /etc/sysconfig/network-scripts/inspur_bak

You can check the file and then restart the network service.

1 ) service network restart
2) exit
----------------------------------------------
Please make your choice:_

When you see this, all the configuration files bound to the network card have been modified. Enter 1 to restart the network service; enter 2 to exit the script directly.

It is recommended to restart the network service. If you exit the script directly without restarting the network service, the modified configuration file will not take effect, and the displayed information will be abnormal when using the script to create the next bound network card (because the script obtains the current network card information through the ifconfig command).

You can check the file and then restart the network service.

1 ) service network restart
2) exit
  ----------------------------------------------
Please make your choice:1
Shutting down interface eth0: [ OK ]
Shutting down interface eth1: [ OK ]
Shutting down interface eth2: [ OK ]
Shutting down interface eth3: [ OK ]
Shut down loopback interface: [OK]
Pop up loopback interface: [OK]
Pop-up interface bond0: RTNETLINK answers: File exists
Error adding address 10.1.1.1 on bond0.
                              [Sure]
Pop-up interface eth0: [OK]
Pop-up interface eth1: [OK]

When you restart the network service for the first time, you may see an error message similar to the one above. Don't worry, the configuration has actually been completed. Restart the network service again and it will return to normal.

The configuration files modified during the binding process are as follows:

[root@node1 tmp]# cd /etc/sysconfig/network-scripts/
[root@node1 network-scripts]# cat ifcfg-bond0 
DEVICE=bond0
BOOTPROTO=none
ONBOOT=yes
TYPE=Ethernet
USERCTL=no
IPV6INIT=no
PEERDNS=yes
IPADDR=10.1.1.1
NETMASK=255.255.255.0
BONDING_OPTS="miimon=100 mode=1"

[root@node1 network-scripts]# cat ifcfg-eth2 
DEVICE=eth2
BOOTPROTO=none
#HWADDR=08:00:27:41:b4:16
ONBOOT=yes
TYPE=Ethernet
USERCTL=no
IPV6INIT=no
PEERDNS=yes
SLAVE=yes
MASTER=bond0

[root@node1 network-scripts]# cat ifcfg-eth3
DEVICE=eth3
BOOTPROTO=none
#HWADDR=08:00:27:6c:3d:0c
ONBOOT=yes
TYPE=Ethernet
USERCTL=no
IPV6INIT=no
PEERDNS=yes
SLAVE=yes
MASTER=bond0

[root@node1 network-scripts]# cat /etc/modprobe.conf
alias scsi_hostadapter ata_piix
alias scsi_hostadapter1 ahci
alias net-pf-10 off
alias ipv6 off
options ipv6 disable=1
alias snd-card-0 snd-intel8x0
options snd-card-0 index=0
options snd-intel8x0 index=0
remove snd-intel8x0 { /usr/sbin/alsactl store 0 >/dev/null 2>&1 || : ; }; /sbin/modprobe -r --ignore-remove snd-intel8x0
alias eth0 e1000
alias eth1 e1000
alias eth2 e1000
alias eth3 e1000
alias bond0 bonding

The network configuration information is as follows:

[root@node1 tmp]# ifconfig 
bond0 Link encap:Ethernet HWaddr 08:00:27:41:B4:16 
     inet addr:10.1.1.1 Bcast:10.1.1.255 Mask:255.255.255.0
     UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1
     RX packets:1197 errors:0 dropped:0 overruns:0 frame:0
     TX packets:125 errors:0 dropped:0 overruns:0 carrier:0
     collisions:0 txqueuelen:0 
     RX bytes: 106338 (103.8 KiB) TX bytes: 16662 (16.2 KiB)

eth0 Link encap:Ethernet HWaddr 08:00:27:35:B4:81 
     inet addr:192.168.56.11 Bcast:192.168.56.255 Mask:255.255.255.0
     UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
     RX packets:1487 errors:0 dropped:0 overruns:0 frame:0
     TX packets:1190 errors:0 dropped:0 overruns:0 carrier:0
     collisions:0 txqueuelen:1000 
     RX bytes: 146576 (143.1 KiB) TX bytes: 151787 (148.2 KiB)

eth1 Link encap:Ethernet HWaddr 08:00:27:72:08:46 
     inet addr:10.1.1.11 Bcast:10.1.1.255 Mask:255.255.255.0
     UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
     RX packets:193 errors:0 dropped:0 overruns:0 frame:0
     TX packets:455 errors:0 dropped:0 overruns:0 carrier:0
     collisions:0 txqueuelen:1000 
     RX bytes:31434 (30.6 KiB) TX bytes:22657 (22.1 KiB)

eth2 Link encap:Ethernet HWaddr 08:00:27:41:B4:16 
     UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1
     RX packets:591 errors:0 dropped:0 overruns:0 frame:0
     TX packets:93 errors:0 dropped:0 overruns:0 carrier:0
     collisions:0 txqueuelen:1000 
     RX bytes:55217 (53.9 KiB) TX bytes:10511 (10.2 KiB)

eth3 Link encap:Ethernet HWaddr 08:00:27:41:B4:16 
     UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1
     RX packets:606 errors:0 dropped:0 overruns:0 frame:0
     TX packets:32 errors:0 dropped:0 overruns:0 carrier:0
     collisions:0 txqueuelen:1000 
     RX bytes:51121 (49.9 KiB) TX bytes:6151 (6.0 KiB)

lo Link encap:Local Loopback 
     inet addr:127.0.0.1 Mask:255.0.0.0
     UP LOOPBACK RUNNING MTU:16436 Metric:1
     RX packets:3297 errors:0 dropped:0 overruns:0 frame:0
     TX packets:3297 errors:0 dropped:0 overruns:0 carrier:0
     collisions:0 txqueuelen:0 
     RX bytes:4725726 (4.5 MiB) TX bytes:4725726 (4.5 MiB)

Dual network card binding information:

[root@node1 tmp]# cat /proc/net/bonding/bond0 
Ethernet Channel Bonding Driver: v3.4.0-2 (October 7, 2008)

Bonding Mode: fault-tolerance (active-backup)
Primary Slave: None
Currently Active Slave: eth2
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0

Slave Interface: eth2
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 08:00:27:41:b4:16

Slave Interface: eth3
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 08:00:27:6c:3d:0c

4. Script code

#!/bin/bash
# Date:2018-11-26 14:28:45
# Author:ZhangJian
# Mail:[email protected]
# Func:Configure Network Bonding
# Version:2.0
#V1.6 version update: The bonding mode mode=x is no longer written into the modprobe.conf file, but is written into ifcfg-bond, because when the mode is changed in the modprobe.conf file, restarting the network service may not take effect.
#V2.0 version update: Set the primary network card as an optional item.

trap "tput clear;tput cup 3;echo 'Any Questions: Send a message to QQ 1037509307.';tput cup 6;exit" 2 3
if [[ -n $1 ]]; then
 cat <<EOF

Network Configuration Assistant
          --- Configure Network Bonding v1.5

Usage:

    sh $0
    chmod +x $0 && ./$0

EOF
exit 0
fi

if [[ $UID -ne 0 ]]; then
 tput clear
 tput cup 6 20
 echo -e "You must use the user: \033[31mROOT\033[0m"
 tput cup 10
 exit
fi

ERROR(){
tput cup $1 $2;tput ed
echo 'Input error,Try again pls.'
echo -e 'Press ENTER to continue..._\b\c'
read inputA
}

Check_BakFile(){
#File backup function#Usage:
#Check_BakFile The file name to be backed up, the backup directory -x (in what time format to back up)
case ${3} in
  -d ) #Daily backup Bak_Date=`date '+%Y-%m-%d'`
    ;;
  -H ) #Hourly backup Bak_Date=`date '+%Y-%m-%d_%H'`
    ;;
  -M ) #Backup by minute Bak_Date=`date '+%Y-%m-%d_%H:%M'`
    ;;
  -m ) #Monthly backup Bak_Date=`date '+%Y-%m'`
    ;;
  -Y ) #Yearly backup Bak_Date=`date '+%Y'`
    ;;
  * ) #Default backup by minute Bak_Date=`date '+%Y-%m-%d_%H:%M'`
    ;;
esac
#Bak_Date=`date '+%Y-%m-%d-%H:%M'`

[[ -d ${2}/${Bak_Date} ]] || mkdir -p ${2}/${Bak_Date}
cp -ra ${1} ${2}/${Bak_Date}
}

bonding_pre(){
#Dual network card binding leading function, determine the legitimacy of the network card, IP, etc. and guide the user to enter the parameters correctly.
#All real network cards NIC_NAME_all=`ifconfig -a | awk '/\<Ethernet\>/ {print $1}' | grep -wEv '^bond[0-9]+'`
#Existing bonded network card NIC_NAME_bond=`ifconfig -a | awk '/^\<bond[0-9]+\>/ {print $1}'`

#Print out the network card that is already a SLAVE NIC_NAME_slave=`ifconfig -a | sed -n '/SLAVE/{g;1!p;};h' | awk '{print $1}'`
NIC_NAME_slave=${NIC_NAME_slave:=NULL}
#Print out the available network cards NIC_NAME_free=`echo "$NIC_NAME_all" | grep -Fwv "$NIC_NAME_slave"`
#Number of available network cards NIC_NAME_free_nu=`echo "$NIC_NAME_free" | wc -w`

declare -a NIC_LIST
NIC_LIST=($NIC_NAME_free)

info_print(){
tput clear; tput cup 2
cat <<EOF
----------------------------------------------
------ Network Configuration Assistant ------
----------------------------------------------
EOF
tput cup 7
if [[ -n ${1} ]]; then
 echo -e "Already existing Channel Bonding Interface of the system:\n\033[31m${1}\033[0m\n"
fi
}

if [[ "$NIC_NAME_free_nu" -gt 1 ]]; then
 info_print
 echo -e "\033[031m$NIC_NAME_free_nu\033[0m network cards available:"
 echo -e "\033[31m${NIC_LIST[@]}\033[0m"
 echo -e "----------------------------------------------\n"
 #Enter the name of the first network card while true; do
  echo -e "\nPlease enter the First NIC:_\b\c"
  read NIC1
  echo ${NIC_LIST[@]} | grep -Fw "$NIC1" &> /dev/null
  if [[ $? -eq 0 ]]; then
   info_print
   echo -e "\033[031m$NIC_NAME_free_nu\033[0m network cards available:\n\033[31m${NIC_LIST[@]}\033[0m"
   echo -e "\nThe information you have entered:\nFirst NIC : $NIC1"
   echo -e "----------------------------------------------\n"
   break
  else
   info_print
   echo -e "\033[031m$NIC_NAME_free_nu\033[0m network cards available:\n\033[31m${NIC_LIST[@]}\033[0m"
   echo -e "----------------------------------------------\n"
   echo -e "\033[31m${NIC1}\033[0m is not available, Please enter another one."
  fi
 done
 #Enter the name of the second network card while true; do
  echo -e "\nPlease select the second NIC:_\b\c"
  read NIC2
  if [[ ${NIC1} != ${NIC2} ]]; then
   echo ${NIC_LIST[@]} | grep -Fw "${NIC2}" &> /dev/null
   if [[ $? -eq 0 ]]; then
    info_print "${NIC_NAME_bond}"
    echo -e "The information you have entered:\nFirst NIC : ${NIC1}\nSecond NIC : ${NIC2}"
    echo -e "----------------------------------------------\n"
    break
   else
    info_print
    echo -e "\033[031m$NIC_NAME_free_nu\033[0m network cards available:\n\033[31m${NIC_LIST[@]}\033[0m\n\nThe information you have entered:\nFirst NIC : ${NIC1}"
    echo -e "----------------------------------------------\n"
    echo -e "\033[31m${NIC2}\033[0m is not available, Please enter another one."
   fi
  else
   info_print
   echo -e "\033[031m${NIC_NAME_free_nu}\033[0m network cards available:\n\033[31m${NIC_LIST[@]}\033[0m\n\nThe information you have entered:\nFirst NIC : ${NIC1}"
   echo -e "----------------------------------------------\n"
   echo -e "\033[31m${NIC2}\033[0m is the first NIC,Please enter another one."
  fi
 done

 #Enter the bonded NIC name and perform a plausibility check if [[ -z ${NIC_NAME_bond} ]]; then
  NAME_bond=bond0
  info_print
  echo -e "The information you have entered:\nFirst NIC : ${NIC1}\nSecond NIC : ${NIC2}\nbond name : ${NAME_bond}"
  echo -e "----------------------------------------------\n"
  echo "The default first bond name is -- bond0."
 else
  while true; do
   echo -e "\nPlease enter a bond name[bonN]:_\b\c"
   read NAME_bond
   #Check if the input format is bond+number format.
   echo "${NAME_bond}" | grep -wE '^bond[[:digit:]]+$' &> /dev/null
   if [[ $? -eq 0 ]]; then
    echo "${NIC_NAME_bond}" | grep -Fw "${NAME_bond}" &> /dev/null
    if [[ $? -ne 0 ]]; then
     info_print "${NIC_NAME_bond}"
     echo -e "The information you have entered:\nFirst NIC : ${NIC1}\nSecond NIC : ${NIC2}\nbond name : ${NAME_bond}"
     echo -e "----------------------------------------------\n"
     break
    else
     info_print "${NIC_NAME_bond}"
     echo -e "The information you have entered:\nFirst NIC : ${NIC1}\nSecond NIC : ${NIC2}"
     echo -e "----------------------------------------------\n"
     echo "You can not use an existing name: ${NAME_bond}"
     echo -e "\033[31m${NAME_bond}\033[0m is not available,Please enter another one like -- bondN."
    fi
   else
    info_print "${NIC_NAME_bond}"
    echo -e "The information you have entered:\nFirst NIC : ${NIC1}\nSecond NIC : ${NIC2}"
    echo -e "----------------------------------------------\n"
    echo -e "\033[31m${NAME_bond}\033[0m is not available,Please enter another one like -- bondN."
   fi
  done
 fi

 #Set IP address while true; do
  echo -e "\nPlease enter an IP address:_\b\c"
  read IP_bond
  echo "${IP_bond}" | grep -owE '^(([1-9]|[1-9][0-9]|1[0-9]{2}|2[0-5]{2})\.){3}([1-9]|[1-9][0-9]|1[0-9]{2}|2[0-5]{2})$' &> /dev/null
  if [[ $? -eq 0 ]]; then
   info_print
   echo -e "The information you have entered:\nFirst NIC : ${NIC1}\nSecond NIC : ${NIC2}\nbond name : ${NAME_bond}\nIP address : ${IP_bond}"
   echo -e "----------------------------------------------\n"
   break
  else
   info_print
   echo -e "The information you have entered:\nFirst NIC : ${NIC1}\nSecond NIC : ${NIC2}\nbond name : ${NAME_bond}"
   echo -e "----------------------------------------------\n"
   echo -e "IP address: \033[31m${IP_bond}\033[0m format errors, please re-enter."
  fi
 done
 #Set netmask
 while true; do
  echo -e "\nPls enter the NETMASK[255.255.255.0]:_\b\c"
  read NETMASK_bond
  NETMASK_bond=${NETMASK_bond:="255.255.255.0"} #When the variable NETMASK_bond is empty, assign it a default value of 255.255.255.0
  echo "$NETMASK_bond" | grep -owE '^(128|192|224|240|248|252|254|255)\.((0|128|192|224|240|248|252|254|255)\.){2}(0|128|192|224|240|248|252|254|255)$' &> /dev/null
  if [[ $? -eq 0 ]]; then
   info_print
   echo -e "The information you have entered:\nFirst NIC : ${NIC1}\nSecond NIC : ${NIC2}\nbond name : ${NAME_bond}\nIP address : ${IP_bond}\nnetmask : ${NETMASK_bond}"
   echo -e "----------------------------------------------\n"
   break
  else
   info_print
   echo -e "The information you have entered:\nFirst NIC : ${NIC1}\nSecond NIC : ${NIC2}\nbond name : ${NAME_bond}\nIP address : ${IP_bond}"
   echo -e "----------------------------------------------\n"
   echo -e "Input error.\nPlease enter the correct NETMASK or press ENTER to use 255.255.255.0.\n"
  fi
 done
#:<<!zhushi! #Batch comments, if batch comments are enabled, the default mode=1
 while true; do
  echo -e "\nPls enter the bonding_mode[default:mode=1,active-backup]:_\b\c"
  read mode_bond
  mode_bond=${mode_bond:="mode=1"} #When the variable mode_bond is empty, assign it a default value of 1
  if [[ ! ${mode_bond} =~ "mode=[0-6]" ]]; then
   info_print
   echo -e "The information you have entered:\nFirst NIC : ${NIC1}\nSecond NIC : ${NIC2}\nbond name : ${NAME_bond}\nIP address : ${IP_bond}\netmask : ${NETMASK_bond}"
   echo -e "----------------------------------------------\n"
   echo "Invalid answer: ${mode_bond}"
   echo "Eg: mode={0,1,2,3,4,5,6}"
  else
   info_print
   echo -e "The information you have entered:\n"
   echo -e "First NIC :${NIC1}\nSecond NIC :${NIC2}\nbond name :${NAME_bond}\nIP address :${IP_bond}\nnetmask :${NETMASK_bond}\nbonding_mode :${mode_bond}"
   echo -e "----------------------------------------------\n"
   break
  fi
 done
#!zhushi!

 #Choose whether to set the primary network card while true; do
  echo "1-${NIC1}"
  echo "2-${NIC2}"
  echo "3-none"
  echo -e "choose whether to set up the primary NIC or not[default:3-none]:_\b\c"
  read get_primary_NIC
  get_primary_NIC=${get_primary_NIC:="none"}
    case ${get_primary_NIC} in
    1 )
     get_primary_NIC=${NIC1}
     #echo "--$get_primary_NIC"
     break
     ;;
    2 )
     get_primary_NIC=${NIC2}
      #echo "--$get_primary_NIC"
     break
     ;;
    3 )
     get_primary_NIC=none
      #echo "--$get_primary_NIC"
     break
     ;;
    none )
     break
     ;;
    * )
      #echo "--$get_primary_NIC"
     info_print
     echo -e "The information you have entered:\nFirst NIC : ${NIC1}\nSecond NIC : ${NIC2}\nbond name : ${NAME_bond}\nIP address : ${IP_bond}\nnetmask : ${NETMASK_bond}"
     echo -e "----------------------------------------------\n"
     echo "Invalid answer: ${get_primary_NIC}"
     echo "Pls input a number in {1,2,3} or press ENTER to set up primary NIC none."
     continue
     ;;
   esac

   info_print
   echo -e "The information you have entered:\n"
   echo -e "First NIC :${NIC1}\nSecond NIC :${NIC2}\nbond name :${NAME_bond}\nIP address :${IP_bond}\nnetmask :${NETMASK_bond}\nbonding_mode :${mode_bond}\nprimary NIC :${get_primary_NIC}"
   echo -e "----------------------------------------------\n"
   break
 done

 #Finally input information to confirmwhile true; do
  info_print
  echo -e "The information you have entered:\n"
  echo -e "\033[31mFirst NIC :${NIC1}\nSecond NIC :${NIC2}\nbond name :${NAME_bond}\nIP address :${IP_bond}\nnetmask :${NETMASK_bond}\nbonding_mode :${mode_bond}\nprimary NIC :${get_primary_NIC}\033[0m"
  echo -e "----------------------------------------------\n"
  echo -e "Pls make sure its OK[y/n]:_\b\c"
  read input
  case ${input} in
   [Yy]|[Yy][Ee][Ss] )
    bonding "$NIC1" "$NIC2" "$NAME_bond" "$IP_bond" "$NETMASK_bond"
    break
    ;;
   [Nn]|[Nn][Oo] )
    bonding_pre
   ;;
   * )
    tput cup 7;tput ed
    ERROR 7 10
   ;;
  esac
 done
else
  info_print
  echo -e "You have \033[031m${NIC_NAME_free_nu}\033[0m network cards available:\n"
  #Mark the highlighted "NIC name" in red echo -e "\033[31m${NIC_LIST[@]}\033[0m\n"
  echo -e "There are \033[31mnot enough\033[0m network cards to make bonding"
  echo -e "Pls check it......\n"
  echo -e 'Press ENTER to exit..._\b\c'
  read answer
  exit 1
fi
}

bonding(){
if [[ $# -lt 5 ]]
then
 echo 'Bonding failed! Please provide enough information!'
 echo -e "\nUsage:\n sh bonding.sh <NIC1_name> <NIC2_name> <bond_name> <IP> <NETMASK>\n\n"
 exit 1
fi
#get device name and ip information
SLAVE1_DEV="$1" #SLAVE1_DEV=ethx
SLAVE2_DEV="$2" #SLAVE2_DEV=ethx
BOND_DEV="$3" #BOND_DEV=bondx
SLAVE1=ifcfg-"$1"
SLAVE2=ifcfg-"$2"
BOND=ifcfg-"$3"
BOND_IPADDR="$4"
BOND_NETMASK="$5"
BOND_DIR=/etc/sysconfig/network-scripts
if [ -e $BOND_DIR/$BOND ]
then
 echo $BOND_DIR/$BOND is already exist
else
 #file backup
 Check_BakFile "${BOND_DIR}/ifcfg-*" "${BOND_DIR}/inspur_bak" "-M"

#get mac address
 SLAVE1_MAC=`grep 'HWADDR' ${BOND_DIR}/${SLAVE1}`
 SLAVE2_MAC=`grep 'HWADDR' ${BOND_DIR}/${SLAVE2}`

 # modify $BOND
 touch $BOND_DIR/$BOND
 echo "DEVICE=${BOND_DEV}" >> $BOND_DIR/$BOND
 echo "BOOTPROTO=none" >> $BOND_DIR/$BOND
 echo "ONBOOT=yes" >> $BOND_DIR/$BOND
 echo "TYPE=Ethernet" >> $BOND_DIR/$BOND
 echo "USERCTL=no" >> $BOND_DIR/$BOND
 echo "IPV6INIT=no" >> $BOND_DIR/$BOND
 echo "PEERDNS=yes" >> $BOND_DIR/$BOND
 echo "IPADDR=${BOND_IPADDR}" >> $BOND_DIR/$BOND
 echo "NETMASK=${BOND_NETMASK}" >> $BOND_DIR/$BOND
 if [[ ${get_primary_NIC} == none ]]; then
   echo "BONDING_OPTS=\"miimon=100 ${mode_bond}\"" >> $BOND_DIR/$BOND
 else
   echo "BONDING_OPTS=\"miimon=100 ${mode_bond} primary=$(echo ${SLAVE1} | cut -d'-' -f2)\"" >> $BOND_DIR/$BOND
 fi

 # modify $SLAVE1
 > $BOND_DIR/$SLAVE1
 echo "DEVICE=${SLAVE1_DEV}" >> $BOND_DIR/$SLAVE1
 echo 'BOOTPROTO=none' >> $BOND_DIR/$SLAVE1
 #cat $BOND_DIR/../ifcfg-bak/$SLAVE1 |grep HWADDR >> $BOND_DIR/$SLAVE1
 echo "#$SLAVE1_MAC" >> $BOND_DIR/$SLAVE1
 echo ONBOOT=yes >> $BOND_DIR/$SLAVE1
 echo TYPE=Ethernet >> $BOND_DIR/$SLAVE1
 echo USERCTL=no >> $BOND_DIR/$SLAVE1
 echo IPV6INIT=no >> $BOND_DIR/$SLAVE1
 echo PEERDNS=yes >> $BOND_DIR/$SLAVE1
 echo SLAVE=yes >> $BOND_DIR/$SLAVE1
 echo MASTER=$BOND_DEV >> $BOND_DIR/$SLAVE1

 # modify SLAVE2
 > $BOND_DIR/$SLAVE2
 echo "DEVICE=$SLAVE2_DEV" >> $BOND_DIR/$SLAVE2
 echo BOOTPROTO=none >> $BOND_DIR/$SLAVE2
 #cat $BOND_DIR/../ifcfg-bak/$SLAVE2 |grep HWADDR >> $BOND_DIR/$SLAVE2
 echo "#$SLAVE2_MAC" >> $BOND_DIR/$SLAVE2
 echo ONBOOT=yes >> $BOND_DIR/$SLAVE2
 echo TYPE=Ethernet >> $BOND_DIR/$SLAVE2
 echo USERCTL=no >> $BOND_DIR/$SLAVE2
 echo IPV6INIT=no >> $BOND_DIR/$SLAVE2
 echo PEERDNS=yes >> $BOND_DIR/$SLAVE2
 echo SLAVE=yes >> $BOND_DIR/$SLAVE2
 echo MASTER=$BOND_DEV >> $BOND_DIR/$SLAVE2

 [[ -e /etc/modprobe.conf.bak ]] && cp /etc/modprobe.conf /etc/modprobe.conf.bak.new || cp /etc/modprobe.conf /etc/modprobe.conf.bak
 echo "alias $BOND_DEV bonding" >> /etc/modprobe.conf

while true; do
 tput clear; tput cup 2
cat <<EOF
----------------------------------------------
------ Network Configuration Assistant ------
----------------------------------------------

Complete!
File backup directory: ${BOND_DIR}/inspur_bak

You can check the file and then restart the network service.

1 ) service network restart
2) exit
----------------------------------------------
EOF
  echo -e "Please make your choice:_\b\c"
  read answer
   case ${answer} in
    1 )
     service network restart
     exit 0
     ;;
    2 )
     exit 0
     ;;
   esac

 done
fi
}

main(){
 while true; do
  bonding_pre
 done
}

The above is the full content of this article. I hope it will be helpful for everyone’s study. I also hope that everyone will support 123WORDPRESS.COM.

You may also be interested in:
  • Linux system dual network card binding configuration implementation
  • Linux uses dual network card bond and screwdriver interface
  • Configuration process of dual network card firewalld under Linux (recommended)
  • Detailed explanation of Linux dual network card binding to achieve load balancing
  • How to set up dual network cards in Linux
  • Summary of the practice of dual network card configuration under Linux system
  • Linux uses bond to implement dual network cards to bind a single IP sample code

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