The default MTU sizes for different network topologies
MTU stands for Maximum Transmission Unit. This is just one of many settings that you may have to adjust to fully optimize your router. The MTU size is a setting that determines the largest packet size that can be transmitted through your system. These packets are measured in octets, or eight-bit bytes. Determine the MTU size of the LAN and WAN of a router If you are using a Cable Modem WAN connection: 1500. If you are using a DSL WAN connection: 1492. Sample layout of the command: $> ping –f –l (this is a lowercase “L”) [MTU size] [destination] How to check your LAN connection of your router to your computer: $> ping –f –l 1500 192.168.0.1. How to check your WAN connection from your Set MTU in VPN environment in case of throughput issues X Definive MTU Size. EXAMPLE: 1492 Non-VPN traffic MTU Size - 73 IPSec Overhead 1419 Definive MTU Size. To set up the new MTU value, you can go under Network | Interfaces, select the WAN interface from which the VPN traffic is going through and: Navigate to Advanced tab. Change the MTU value with the one obtained with the previous test. Click OK. Configuring WAN Settings for Your Internet Connection
The Maximum Transmission Unit (MTU) feature of your Linksys router is an advanced configuration that allows you to determine the largest data size permitted on your connection. Generally, if your MTU is too large for the connection, your computer will experience packet loss or dropping internet connection. This article will help you determine and set up the correct MTU size.
Determine the MTU size of the LAN and WAN of a router
Configuring WAN Settings for Your Internet Connection
MTU changes on a firewall - June 2010 - Forums - CNET Jun 16, 2010 Troubleshooting NetScaler SD-WAN MTU Settings