The em driver provides support for PCI Gigabit Ethernet adapters based on the Intel 82540, 82541ER, 82541PI, 82542, 82543, 82544, 82545, 82546, 82546EB, 82546GB, 82547 and 82573 Ethernet controller chips. The driver supports Transmit/Receive checksum offload and Jumbo Frames only on 82540, 82543, 82544 and 82546-based adapters. For further hardware information, see the README included with the driver.
For questions related to hardware requirements, refer to the documentation supplied with your Intel PRO/1000 adapter. All hardware requirements listed apply to use with
Support for Jumbo Frames is provided via the interface MTU setting. Selecting an MTU larger than 1500 bytes with the ifconfig(8) utility configures the adapter to receive and transmit Jumbo Frames. The maximum MTU size for Jumbo Frames is 16114.
This driver version supports VLANs. For information on enabling VLANs, see the README. The em driver supports the following media types: