How to set permanent mtu size for ppp0

Question

every time I connect to my VPN, I should run

sudo ifconfig ppp0 mtu 1300

How could I make it permanent?

I'm using Ubuntu 14.04

Answer 1

You can make your custom script at this address : /etc/network/if-up.d,

#!/bin/sh

if [ "$IFACE" = "ppp0" ]; then
    sudo ifconfig ppp0 mtu 1300
fi

finally make executable and enjoy from your life ...