Configure Jumbo Frames on Hardware iSCSI HBA in ESX 4

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Before you begin, check the names of the vmhba adapters on your ESX server. From the vSphere Client go to Configuration tab and click on Storage Adapters. Now, to set Jumbo Frame support (MTU 9000) on your hardware iSCSI HBA, follow these steps:

  1. Login as Root user on your ESX server.
  2. Type: #esxcfg-hwiscsi –j enable
  3. If successful, you should get the “MTU size successfully set to : 9000” message.
  4. To verify the change type: #esxcfg-hwiscsi –l

All done!

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