SDN in BASH

Using BASH to manage Bridged VLANs on Debian.

Script to manage VLANS, https://github.com/lathama/bridged-vlan-debian-script

possibly out of date

#!/bin/bash
clear
addvlanbridge () {
 clear
 echo
 echo "What interface to use? [eth0]"
 read  interface
 if [[ -z ${interface} ]]; then
  interface="eth0"
 fi
 echo "The interface you selected is: $interface"
 echo -e "Please type the VLAN ID number you want to add as a bridged device: \c "
 read  vlan
 echo "The VLAN ID you entered is: $vlan"
 vconfig set_name_type VLAN_PLUS_VID_NO_PAD
 vconfig add $interface $vlan
 brctl addbr brvlan$vlan
 brctl addif brvlan$vlan vlan$vlan
 ifconfig vlan$vlan up
 ifconfig brvlan$vlan up
 echo "You need to add some entries to the /etc/network/interfaces file"
 echo
 echo "
 auto vlan$vlan
 iface vlan$vlan inet manual
  vlan_raw_device $interface
  up ifconfig \$IFACE up"
 echo "
 auto brvlan$vlan
 iface brvlan$vlan inet manual
  bridge_ports vlan$vlan
  up ifconfig \$IFACE up"
 echo
 echo "Press enter to return"
 read back
}
removebridgevlan () {
 clear
 echo
 echo "What VLAN to remove?"
 read vlan
 echo "You selected $vlan"
 ifconfig brvlan$vlan down
 brctl delif brvlan$vlan vlan$vlan
 brctl delbr brvlan$vlan
 ifconfig vlan$vlan down
 vconfig rem vlan$vlan
 echo
 echo "Warning: You need to clean up the /etc/network/interfaces file!"
 echo
 echo "Press enter to return"
 read back
}
showvlan () {
 clear
 echo
 echo "Look at the VLANs"
 echo
 echo
 cat /proc/net/vlan/config
 echo
 echo "Press enter to return"
 read back
}

showbridge () {
 clear
 echo
 echo "Look at the bridges"
 echo
 echo
 brctl show
 echo
 echo "Press enter to return"
 read back
}

while : # Loop forever
do
clear
cat << !

1. Add VLAN and Bridge
2. Remove Bridge and VLAN
3. Show current VLAN config
4. Show current Bridge config
5. Exit

!
echo -n " Your choice? : "
read choice

case $choice in
1) addvlanbridge ;;
2) removebridgevlan ;;
3) showvlan ;;
4) showbridge ;;
5) exit ;;
*) echo "\"$choice\" is not valid "; sleep 2 ;;
esac
done