Personal Hotspot Backup Plan (OS X)

restore-default-route

#!/usr/bin/env bash
# After disconnecting from the iPhone Hotspot, run this command

OLD_DEFAULT_ROUTE="10.0.1.1"

# Turn off WiFi
networksetup -setairportpower en0 off

# Flush all routes
sudo route flush

# Add the new default route
sudo route -n add default "$OLD_DEFAULT_ROUTE"

switch-default-route

#!/usr/bin/env bash
set -e
# After connecting to the iPhone Hotspot, run this command

NEW_DEFAULT_ROUTE="172.20.10.1"
HOTSPOT_SSID="ASC-IPHONE6"

echo "Please turn on the iPhone Hotspot $HOTSPOT_SSID."

sleep 5

# Turn on WiFi and connect to Hotspot
networksetup -setairportpower en0 on
networksetup -setairportnetwork en1 "$HOTSPOT_SSID" 'wifipassword'

sleep 5

# Flush all routes
sudo route flush

# Add the new default route
sudo route -n add default "$NEW_DEFAULT_ROUTE"