====== Interface Config ======
<color darkorange>Jan 2020</color>\\ 

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**Introduction**
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When using the M1 chassis, it should have been installed using the official .ISO, so this is applicable to both RX1 and MKSP installation.
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Even though the interface configuration may look okay, there is an issue with the way the interfaces are installed, to remedy this you can run a small script that will recreate all of the configuration files.
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The script <color #ed1c24>update_network_devices.sh</color> can be downloaded {{ :update_network_devices.zip |here}}:
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To use the script, copy it to a folder that you have rights to use (/mfeng/home) and give the file exectue rights:
    chmod +x update_network_devices.sh
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Now run the file using the following command:
    ./update_network_devices.sh
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The script will create new ifcfg-ethx files depending on installed hardware (what NIC cards you have installed).
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Navigate to /etc/sysconfig/network-scripts and edit ifcfg-eth0 (as sudo)
    sudo /etc/sysconfig/network-scripts/ifcfg-eth0
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Now add all of your IP Details.
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Alternatively you can configure the interfaces via nmtui or the front panel (might have to reboot to use the front panel)
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===== Interface Script =====
<file>
#!/bin/sh

# Script to assign names and hardware IDs to ifcfg-net* files as well as turn on
# consistent NIC naming. This resolves the issue of NIC ports swapping around
# due to boot-time race conditions. It should be run manually once after upgrade
# if you have multiple NICs. However it will delete all network configuration
# and rename NICs to be net0, net1, etc, which is not supported by all software.

echo "RUNNING SCRIPT: update_network_devices VERSION 0.2"

# recognised NICs                                       # from https://devicehunt.com/
DEVICE_CODE_ONBOARD="8086:1533"                         # Intel Corporation - I210 Gigabit Network Connection
DEVICE_CODE_10G_CARD="8086:10fb|8086:1572|8086:1528"    # Intel Corporation - 82599ES 10-Gigabit SFI/SFP+ Network Connection
                                                        # Intel Corporation - Ethernet Controller X710 for 10GbE SFP+
                                                        # Intel Corporation - Ethernet Controller 10-Gigabit X540-AT2
DEVICE_CODE_1G_CARD="8086:1521"                         # Intel Corporation - I350 Gigabit Network Connection


TMP_FILE="/tmp/nic_order_tmp.txt"
FILE_ETHX_TEMPLATE=/etc/sysconfig/network-scripts/ifcfg-
GRUB_FILE="/etc/default/grub"

function create_ifcfg() {
touch $1
cat > $1 << "EOF"
TYPE=Ethernet
BOOTPROTO="dhcp"
ONBOOT=yes
PERSISTENT_DHCLIENT=yes
IPV6INIT=no
PEERNTP=no
EOF
chmod 755 $1
}

function detect_nic_card() {
    device_code=$1
    lspci_id=$(lspci -nn | egrep "\[${device_code}\]" | egrep -o "[0-9]{2}:[0-9]{2}\.[0-9]")
    for i in ${lspci_id};
    do
        mac_addr=$(dmesg | fgrep $i | egrep -o "(([0-9a-f]{2}:){5}[0-9a-f]{2})")
        echo "eth$net_index $mac_addr $i" >> $TMP_FILE
        net_index=$(( $net_index + 1 ))
    done
}

# Check we have root privledges
if [[ $EUID != 0 ]]; then
    echo "root privileges needed, please re-run with sudo"
    exit 1
fi

# Delete existing ifcfg files
mv ${FILE_ETHX_TEMPLATE}lo /tmp/ifcfg-lo
rm -Rf ${FILE_ETHX_TEMPLATE}*
mv /tmp/ifcfg-lo ${FILE_ETHX_TEMPLATE}lo

rm -rf $TMP_FILE
touch $TMP_FILE

# Create entries in nic order file
net_index=0
detect_nic_card $DEVICE_CODE_ONBOARD
detect_nic_card $DEVICE_CODE_10G_CARD
detect_nic_card $DEVICE_CODE_1G_CARD

#iterate through nic order file and update ifcfg files
echo "Hard coding ethernet devices as follows:"
while read line; do

    echo $line

    name=`echo "$line" | awk -F ' ' '{print $1}'`
    mac=`echo "$line" | awk -F ' ' '{print $2}'`
    ifcfg_file=${FILE_ETHX_TEMPLATE}$name

    # Check if an ifcfg file already exists for this interface and if not, create it
    if [ ! -f $ifcfg_file ]; then
        create_ifcfg ${ifcfg_file}
    fi

    # Remove entries that we are going to set from the ifcfg file
    sed -i '/DEVICE/d' ${FILE_ETHX_TEMPLATE}$name
    sed -i '/NAME/d' ${FILE_ETHX_TEMPLATE}$name
    sed -i '/HWADDR/d' ${FILE_ETHX_TEMPLATE}$name
    sed -i '/UUID/d' ${FILE_ETHX_TEMPLATE}$name   #Remove UUID entry to ensure we do not have a conflict between current UUID and the MAC address
    sed -i '/NM_CONTROLLED/d' ${FILE_ETHX_TEMPLATE}$name
    sed -i '/^[[:space:]]*$/d' ${FILE_ETHX_TEMPLATE}$name   # Remove blank lines

    # Add fields to ifcfg file
    echo "DEVICE=$name" >> ${FILE_ETHX_TEMPLATE}$name
    echo "NAME=$name" >> ${FILE_ETHX_TEMPLATE}$name
    echo "HWADDR=$mac" >> ${FILE_ETHX_TEMPLATE}$name
    echo "NM_CONTROLLED=yes" >> ${FILE_ETHX_TEMPLATE}$name

done <$TMP_FILE

# Finally, enable consistent naming which ensures ifcfg files are used
sed -i 's/net.ifnames=0/net.ifnames=1/g' $GRUB_FILE
grub2-mkconfig -o $(readlink -e /etc/grub2.cfg)

echo "Please review network configuration files ${FILE_ETHX_TEMPLATE}-X - THEN reboot"
</file>