Configure MTU Size

It makes sense to set the MTU size from 1500 to 9000 for Ethernet connections with a bandwidth of 10Gb/sec or above.

Procedure 1

• In the Control Panel, select Network and Internet > Network Connections > Change Adapter Settings

• Right-click the icon of the desired network connected, and then click Properties.

• Click the Networking tab.

• Click Configure.

• Click the Advanced Settings tab.

• In Properties, select Jumbo Packet.

• In Value, select 9014 Bytes.

• Click OK.

• Deactivate and activate the network connection

• If you have changed the MTU size for adapters that belong to a LACP channel deactivate and activate all virtual adapters that run on the LACP channel.

• Close Network Connections

• Open Command Prompt as an administrator.

• Use the netsh command to show the index (Idx) and MTU of each network interface.

• Execute the following command:

netsh interface ipv4 show interface

Output:

Idx     Met         MTU          State                Name
---  ----------  ----------  ------------  ---------------------------
  1          75  4294967295  connected     Loopback Pseudo-Interface 1
 11           5        1500  disconnected  Embedded NIC 2
 16          25        1500  connected     EmbeddedNIC1_VL77
  9          10        9000  connected     50GE_Teaming_Interface - VLAN 1
 17          10        9000  connected     50GE_Teaming_Interface - VLAN 2
 15          10        9000  connected     50GE_Teaming_Interface - VLAN 3
  4          10        9000  connected     50GE_Teaming_Interface - VLAN 4
 10          10        9000  connected     50GE_Teaming_Interface - VLAN 5

Make sure, that the MTU is shown as 9000 for a desired connections

Procedure 2

Open Command Prompt as an administrator.

Execute the following command:

netsh interface ipv4 show interface

Output:

Idx     Met         MTU          State                Name
---  ----------  ----------  ------------  ---------------------------
  1          75  4294967295  connected     Loopback Pseudo-Interface 1
 11           5        1500  disconnected  Embedded NIC 2
 16          25        1500  connected     EmbeddedNIC1_VL77
  9          10        1500  connected     50GE_Teaming_Interface - VLAN 1
 17          10        1500  connected     50GE_Teaming_Interface - VLAN 2
 15          10        1500  connected     50GE_Teaming_Interface - VLAN 3
  4          10        1500  connected     50GE_Teaming_Interface - VLAN 4
 10          10        1500  connected     50GE_Teaming_Interface - VLAN 5

Verify the index (idx) if the desired network connection

If the MTU is 9000, then no action is necessary. If it is not, execute the following command

netsh interface ipv4 set interface 4 mtu=9000

Verify the set value

netsh interface ipv4 show interface