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    Command:

    mxge

    
         kernel configuration file:
    
               device firmware
               device mxge
    
         Alternatively, to load the driver as a module at boot time, place the
         following lines in loader.conf(5):
    
               if_mxge_load="YES"
               mxge_ethp_z8e_load="YES"
               mxge_eth_z8e_load="YES"
               mxge_rss_ethp_z8e_load="YES"
               mxge_rss_eth_z8e_load="YES"
    
    
    

    DESCRIPTION

         The mxge driver provides support for PCI Express 10 Gigabit Ethernet
         adapters based on the Myricom LANai Z8E chip.  The driver supports Trans-
         mit/Receive checksum offload, Jumbo Frames, TCP segmentation offload
         (TSO) as well as Large Receive Offload (LRO).  For further hardware
         information, see http://www.myri.com/.
    
         For questions related to hardware requirements, refer to the documenta-
         tion supplied with your Myri10GE adapter.  All hardware requirements
         listed apply to use with FreeBSD.
    
         Support for Jumbo Frames is provided via the interface MTU setting.
         Selecting an MTU larger than 1500 bytes with the ifconfig(8) utility con-
         figures the adapter to receive and transmit Jumbo Frames.  The maximum
         MTU size for Jumbo Frames is 9000.
    
         For more information on configuring this device, see ifconfig(8).
    
    
    

    HARDWARE

         The mxge driver supports 10 Gigabit Ethernet adapters based on the Myri-
         com LANai Z8E chips:
    
         ?   Myricom 10GBase-CX4 (10G-PCIE-8A-C, 10G-PCIE-8AL-C)
         ?   Myricom 10GBase-R (10G-PCIE-8A-R, 10G-PCIE-8AL-R)
         ?   Myricom 10G XAUI over ribbon fiber (10G-PCIE-8A-Q, 10G-PCIE-8AL-Q)
    
    
    

    LOADER TUNABLES

         Tunables can be set at the loader(8) prompt before booting the kernel or
         stored in loader.conf(5).
    
         hw.mxge.flow_control_enabled
                 Whether or not hardware flow control is enabled on the adapter.
                 The default value is 1.
    
         hw.mxge.intr_coal_delay
                 This value delays the generation of all interrupts in units of 1
                 microsecond.  The default value is 30.
    
                 different slices based on the value of hw.mxge.rss_hashtype.
                 Using multiple slices requires that your motherboard and Myri10GE
                 NIC both be capable of MSI-X.  Older Myri10GE NICs can be field
                 upgraded to add MSI-X using the "10G NIC Tool Kit" for FreeBSD
                 which is available from
                 http://www.myri.com/scs/download-10g-tools.html.
    
         hw.mxge.rss_hashtype
                 This value determines how incoming traffic is steered to differ-
                 ent slices.  This tunable is ignored when using just a single
                 slice.  The legal values for this tunable are:
    
                 1     Hash on the source and destination IPv4 addresses.
    
                 2     Hash on source and destination IPv4 addresses and if the
                       packet is TCP, then also hash on the TCP source and desti-
                       nation ports.
    
                 4     Hash on the TCP or UDP source ports.  This is the default
                       value.
    
    
    

    DIAGNOSTICS

         mxge%d: Unable to allocate bus resource: memory  A fatal initialization
         error has occurred.
    
         mxge%d: Unable to allocate bus resource: interrupt  A fatal initializa-
         tion error has occurred.
    
         mxge%d: Could not find firmware image %s  The appropriate firmware kld
         module was not installed.  This is a non-fatal initialization error, but
         will result in running in a reduced performance mode.
    
    
    

    SUPPORT

         For general information and support, go to the Myricom support website
         at: http://www.myri.com/scs/.
    
         If an issue is identified with the released source code on the supported
         kernel with a supported adapter, email the specific information related
         to the issue to <help@myri.com>.
    
    
    

    SEE ALSO

         altq(4), arp(4), netintro(4), ng_ether(4), ifconfig(8)
    
    
    

    HISTORY

         The mxge device driver first appeared in FreeBSD 6.3.
    
    
    

    AUTHORS

         The mxge driver was written by Andrew Gallatin <gallatin@FreeBSD.org>.
    
    
    

    BSD February 13, 2008 BSD

    
    
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