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    The following form allows you to view linux man pages.

    Command:

    nge

    
         kernel configuration file:
    
               device miibus
               device nge
    
         Alternatively, to load the driver as a module at boot time, place the
         following line in loader.conf(5):
    
               if_nge_load="YES"
    
    
    

    DESCRIPTION

         The nge driver provides support for various NICs based on the National
         Semiconductor DP83820 and DP83821 Gigabit Ethernet controller chips.
    
         The DP83820 supports TBI (ten bit interface) and GMII transceivers, which
         means it can be used with either copper or 1000baseX fiber applications.
         The DP83820 supports TCP/IP checksum offload and VLAN tagging/insertion
         as well as a 2048-bit multicast hash filter and up to 4 pattern match
         buffers.
    
         Most cards also use the DP83861 10/100/1000 copper gigabit transceiver
         chip, which supports autonegotiation of 10, 100 and 1000Mbps modes in
         full or half duplex.
    
         The DP83820 and DP83821 also support jumbo frames, which can be config-
         ured 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.  Using jumbo frames can greatly improve perfor-
         mance for certain tasks, such as file transfers and data streaming.
    
         The nge driver supports the following media types:
    
         autoselect   Enable autoselection of the media type and options.  The
                      user can manually override the autoselected mode by adding
                      media options to rc.conf(5).
    
         10baseT/UTP  Set 10Mbps operation.  The ifconfig(8) mediaopt option can
                      also be used to select either full-duplex or half-duplex
                      modes.
    
         100baseTX    Set 100Mbps (Fast Ethernet) operation.  The ifconfig(8)
                      mediaopt option can also be used to select either
                      full-duplex or half-duplex modes.
    
         1000baseTX   Set 1000baseTX operation over twisted pair.  full-duplex and
                      half-duplex modes are supported.
    
         1000baseSX   Set 1000Mbps (Gigabit Ethernet) operation.  Both full-duplex
                      and half-duplex modes are supported.
    
         The nge driver supports the following media options:
    
         ?   Linksys EG1032, revision 1
         ?   Netgear GA621
         ?   Netgear GA622T
         ?   SMC EZ Card 1000 (SMC9462TX)
         ?   Surecom Technology EP-320G-TX
         ?   Trendware TEG-PCITX (32-bit PCI) and TEG-PCITX2 (64-bit PCI)
    
    
    

    SYSCTL VARIABLES

         The following variables are available as both sysctl(8) variables and
         loader(8) tunables:
    
         dev.nge.%d.int_holdoff
                 Maximum amount of time to delay interrupt processing in units of
                 100us.  The accepted range is 0 to 255, the default is 1(100us).
                 Value 0 completely disables the interrupt moderation.  The inter-
                 face has to be brought down and up again before a change takes
                 effect.
    
    
    

    DIAGNOSTICS

         nge%d: couldn't map memory  A fatal initialization error has occurred.
    
         nge%d: couldn't map ports  A fatal initialization error has occurred.
    
         nge%d: couldn't map interrupt  A fatal initialization error has occurred.
    
         nge%d: no memory for softc struct!  The driver failed to allocate memory
         for per-device instance information during initialization.
    
         nge%d: failed to enable memory mapping!  The driver failed to initialize
         PCI shared memory mapping.  This might happen if the card is not in a
         bus-master slot.
    
         nge%d: no memory for jumbo buffers!  The driver failed to allocate memory
         for jumbo frames during initialization.
    
         nge%d: watchdog timeout  The device has stopped responding to the net-
         work, or there is a problem with the network connection (cable).
    
    
    

    SEE ALSO

         altq(4), arp(4), miibus(4), netintro(4), ng_ether(4), polling(4),
         vlan(4), ifconfig(8)
    
         National Semiconductor DP83820 datasheet, http://www.national.com.
    
         National Semiconductor DP83861 datasheet, http://www.national.com.
    
    
    

    HISTORY

         The nge device driver first appeared in FreeBSD 4.4.
    
    
    

    AUTHORS

         The nge driver was written by Bill Paul <wpaul@bsdi.com>.
    
    
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