I have a number of Site-to-Site VPN tunnels in my network configurations. They are configured using Cisco ASA devices.
To resolve some performance issues I am trying to change the MTU for traffic through the VPN tunnel to 1400. My question is: In order to change the MTU for traffic through the tunnel, which interface do I need to change the MTU on? Do I just need to change it for the Outside interface? Or do I also need to change it for the Inside/other interface(s)?