NAME

       ixlv — Intel XL710 Ethernet 40Gb VF driver

SYNOPSIS

       To compile this driver into the kernel, place the following lines in your kernel configuration file:

             device ixlv

       To load the driver as a module at boot time, place the following lines in loader.conf(5):

             if_ixlv_load="YES"

DESCRIPTION

       The  ixlv  driver provides virtualization support for PCI Express adapters or LOMs in the XL710 Family of
       ethernet devices.  The driver supports Jumbo Frames, TX/RX checksum  offload,  TCP  segmentation  offload
       (TSO),  Large  Receive Offload (LRO), VLAN tag insertion/extraction, VLAN checksum offload, VLAN TSO, and
       Receive Side Steering (RSS), all for both IPv4 and IPv6.  For further hardware information and  questions
       related to hardware requirements, see http://support.intel.com/.

       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 9706.

       Offloads  are also controlled via the interface, for instance, checksumming for both IPv4 and IPv6 can be
       set and unset, TSO4 and/or TSO6, and finally LRO can be set and unset.

       For more information on configuring this device, see ifconfig(8).

       NOTE: The ixlv driver is only used by means of SRIOV, normally in a VM  on  a  hosting  server  with  the
       ixl(4) driver.

LOADER TUNABLES

       Tunables can be set at the loader(8) prompt before booting the kernel or stored in loader.conf(5).

       hw.ixlv.ringsz
               Set the number of descriptors in the rings, note that this changes BOTH the TX and RX rings, they
               cannot be set independently.

       hw.ixlv.max_queues
               Set  the  number  of  queues  (each  a  TX/RX pair) for the port, this allows one to override the
               autocalculation if it is set to 0.

       hw.ixlv.txbrsz
               Set the size of the buff ring used by the transmit side of the stack, we have found  that  it  is
               necessary to have it quite large in order to get UDP to perform well.

       hw.ixlv.dynamic_rx_itr
               The dynamic RX interrupt control, set to 1 to enable, off by default.

       hw.ixlv.dynamic_tx_itr
               The dynamic TX interrupt control, set to 1 to enable, off by default.

       hw.ixlv.rx_itr
               The RX interrupt rate value, set to 8K by default.

       hw.ixlv.tx_itr
               The TX interrupt rate value, set to 4K by default.

SUPPORT

       For general information and support, go to the Intel support website at: http://support.intel.com/.

       If  an  issue is identified with this driver with a supported adapter, email all the specific information
       related to the issue to ⟨freebsd@intel.com⟩.

SEE ALSO

       arp(4), ixl(4), netintro(4), ng_ether(4), vlan(4), ifconfig(8)

HISTORY

       The ixlv device driver first appeared in FreeBSD 10.1.

AUTHORS

       The ixlv driver was written by Jack Vogel <jfv@FreeBSD.org> and Eric Joyner <ricera10@gmail.com>.

Debian                                           March 25, 2015                                          IXLV(4)