D-Link DSN-1100 X Stack User Manual page 100

2. To change the MTU size, select a value from the MTU Size drop-down list.
3. Click the Apply button.
4. If you changed the MTU setting, restart the xStack Storage system to have the new
setting take effect.
90 Chapter 6 Managing Management and Ethernet Ports and Portals
Figure 6-4. Example of Port Tab
The standard MTU size (and default value) is 1500. However, you can select
a larger value if your iSCSI network can handle a larger frame size to see
whether it improves performance. Selecting a higher MTU value (known in
the industry as "jumbo frames") requires all network equipment involved,
such as switches, to be capable of and configured to handle an MTU of at
least 4088 or 9000, depending on your selection.
Note that the xStack Storage system can only have up to four Ethernet ports
connected to the SAN if 9000 is selected.