MTU defines the size of the largest packet that a protocol can transmit from the system. By default, most NIC drivers define the MTU size to 1500. However, if Jumbo frames are traversing the network, the default value is insufficient. Support for Jumbo frames requires the MTU size to be at least 9000.
Change the default value of the MTU size as follows:
# dladm set-linkprop -p mtu=new-size datalink
After changing the MTU size, you can reconfigure an IP interface over the datalink.
The following example shows how to enable support for Jumbo frames. This example assumes that you have already removed any existing IP interface configuration over the datalink.
# dladm show-linkprop -p mtu net1 LINK PROPERTY PERM VALUE EFFECTIVE DEFAULT POSSIBLE net1 mtu rw 1500 1500 1500 1500 # dladm set-linkprop -p mtu=9000 net1 # dladm show-link net1 LINK CLASS MTU STATE BRIDGE OVER web1 phys 9000 up -- --