wit-network-config/files/qemu-ifdown

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#!/bin/bash
set -e
IFACE=$1
### IPv4 is IFACE public and has a route? if so, nuke it
for route in $(vtysh -c "show ip route kernel" | grep "$IFACE" | awk '{ print $2 }')
do
echo "removing route for $IFACE: $route"
ip route del $route
done
#### IPv6 is IFACE public and has a route? if so, nuke it
#for route in $(vtysh -c "show ipv6 route kernel" | grep "$IFACE" | awk '{ print $2 }')
# do
# echo "removing route for $IFACE: $route"
# ip route del $route
#done
### is IFACE private and has a local bridge?
BRIDGE=$(readlink -f /sys/devices/virtual/net/$IFACE/brport/bridge || true)
if [ ! -z $BRIDGE ]; then
BRIDGE=${BRIDGE##*/}
echo "removing $IFACE from $BRIDGE"
brctl delif $BRIDGE $IFACE
if ! ls /sys/devices/virtual/net/$BRIDGE/brif/ | grep -qv vxlan; then #if so is the *local* bridge now empty? if so, nuke the whole bridge including tunnel endpoint
echo "removing unused bridge: $BRIDGE"
ip link del dev $(ls /sys/devices/virtual/net/$BRIDGE/brif/ | grep vxlan)
ip link set down $BRIDGE
brctl delbr $BRIDGE
fi
fi