+
+###remove PXE bridge
+echo "${blue}Checking whether PXE bridge ${pxe_bridge} exists${reset}"
+if ! brctl show ${pxe_bridge} 2>&1 | grep -i 'No such device'; then
+ echo "${blue}PXE bridge ${pxe_bridge} detected! Removing...${reset}"
+ link_state=$(ip link show ${pxe_bridge} | grep -oP 'state \K[^ ]+')
+ if [[ ${link_state} != 'DOWN' ]]; then
+ ip link set dev ${pxe_bridge} down
+ sleep 5
+ link_state=$(ip link show ${pxe_bridge} | grep -oP 'state \K[^ ]+')
+ if [[ ${link_state} != 'DOWN' ]]; then
+ echo "${red}Could not bring DOWN bridge ${pxe_bridge} link state is ${link_state}${reset}"
+ exit 1
+ fi
+ fi
+ brctl delbr ${pxe_bridge}
+ if ifconfig | grep ${pxe_bridge} || brctl show | grep ${pxe_bridge}; then
+ echo "${red}Error trying to remove ${pxe_bridge}${reset}"
+ exit 1
+ else
+ echo "${blue}PXE bridge ${pxe_bridge} removed${reset}"
+ fi
+else
+ echo "${blue}PXE bridge ${pxe_bridge} does not exist${reset}"
+fi
+
+###remove PXE interface (VLAN 0)
+echo "${blue}Checking whether PXE interface (VLAN 0) exists and remove it${reset}"
+remove_interface_with_name_pattern "enp.+s.+\.0"
+
+###remove Openstack Management interface (VLAN 300)
+echo "${blue}Checking whether Openstack Management interface (VLAN 300) exists and remove it${reset}"
+remove_interface_with_name_pattern "enp.+s.+\.${management_vid}"
+
+###bounce interfaces to restore default IP config
+echo "${blue}Bouncing interfaces to restore IP config${reset}"
+for interface in $first_interface $second_interface; do
+ echo "${blue}Bouncing interface: ${interface}${reset}"
+ ifdown $interface
+ sleep 5
+ ifup $interface
+ tries=5
+ counter=0
+ while [ $counter -lt $tries ]; do
+ if ip addr show $interface | grep -Eo "inet [0-9]+\.[0-9]+\.[0-9]+\.[0-9]+"; then
+ temp_ip=$(ip addr show $interface | grep -Eo "inet [0-9]+\.[0-9]+\.[0-9]+\.[0-9]+" | awk '{print $2}')
+ echo "${blue}IP found on ${interface}. IP is ${temp_ip}${reset}"
+ break
+ else
+ ((counter++))
+ sleep 2
+ fi
+ done
+
+ if [ "$counter" -ge 5 ]; then
+ echo "${red}Error: Unable to get IP address on ${interface}${reset}"
+ exit 1
+ fi
+done