Selecting jumbo frame mode on Gigabit Ethernet

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You must select the jumbo frame mode as a device option.

Trying to change the MTU size with the ifconfig command does not work. Use SMIT to display the adapter settings with the following steps:

  1. Select Devices
  2. Select Communications
  3. Select Adapter Type
  4. Select Change/Show Characteristics of an Ethernet Adapter
  5. Change the Transmit Jumbo Frames option from no to yes
The SMIT screen looks like the following: 
                                  Change/Show Characteristics of an Ethernet Adapter

Type or select values in entry fields.
Press Enter AFTER making all desired changes.

                                                     [Entry Fields]
  Ethernet Adapter                                    ent0
  Description                                         10/100/1000 Base-TX PCI-X Adapter (14106902)
  Status                                              Available
  Location                                            1H-08
  Receive descriptor queue size                      [1024]                                                      +#
  Transmit descriptor queue size                     [512]                                                       +#
  Software transmit queue size                       [8192]                                                      +#
  Transmit jumbo frames                               yes                                                         +
  Enable hardware transmit TCP resegmentation         yes                                                         +
  Enable hardware transmit and receive checksum       yes                                                         +
  Media Speed                                         Auto_Negotiation                                            +
  Enable ALTERNATE ETHERNET address                   no                                                          +
  ALTERNATE ETHERNET address                         [0x000000000000]                                             +
  Apply change to DATABASE only                       no                                                          +

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