Packet loss or dropping Internet connection

The Maximum Transmission Unit (MTU) feature 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, RDP issue or dropping Internet connection.

To determine the correct MTU size for your network, you’ll have to do a specific ping test on the destination you’re trying to go to like using another computer or a web address.

Once you get the correct MTU value, you can change it on your server using the below steps:

On Windows:

C:\Windows\system32>netsh

netsh>interface ipv4

netsh interface ipv4>show subinterface

   MTU  MediaSenseState   Bytes In  Bytes Out  Interface
------  ---------------  ---------  ---------  -------------
4123495            1          0      81224  Loopback Pseudo-Interface 1
  1500                1  11252355840  6937787731  Local Area Connection 7

netsh interface ipv4>set subinterface "Local Area Connection 7" mtu=1300 store=persistent
Ok.

netsh interface ipv4>show subinterface

   MTU  MediaSenseState   Bytes In  Bytes Out  Interface
------  ---------------  ---------  ---------  -------------
4294967295                1          0      81224  Loopback Pseudo-Interface 1
  1300                1  11252459748  6937853509  Local Area Connection 7

On Linux (Redhat):

Check your current MTU value using the below command:

# ifconfig

Or,

# ip link list

Now change it as follows:

# ifconfig eth0 mtu 1300

Or,

# ip link set dev eth0 mtu 1300

To make the setting permanent for eth0, edit/add the MTU value in below configuration file:

/etc/sysconfig/network-scripts/ifcfg-eth0

Save the file and restart network service:

# service network restart