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BGE(4)                 FreeBSD Kernel Interfaces Manual                 BGE(4)

     bge -- Broadcom BCM570x PCI gigabit ethernet adapter driver

     device miibus
     device bge

     The bge driver provides support for various NICs based on the Broadcom
     BCM570x family of gigabit ethernet controller chips, including the fol-

     +o   3Com 3c996-T (10/100/1000baseTX)
     +o   Dell PowerEdge 2550 integrated BCM5700 NIC (10/100/1000baseTX)
     +o   HP ProLiant NC7760 embedded Gigabit NIC (10/100/1000baseTX)
     +o   HP ProLiant NC7770 PCI-X Gigabit NIC (10/100/1000baseTX)
     +o   HP ProLiant NC7781 embedded PCI-X Gigabit NIC (10/100/1000baseTX)
     +o   IBM x235 server integrated BCM5703x NIC (10/100/1000baseTX)
     +o   Netgear GA302T (10/100/1000baseTX)
     +o   SysKonnect SK-9D21 (10/100/1000baseTX)
     +o   SysKonnect SK-9D41 (1000baseSX)

     All of these NICs are capable of 10, 100 and 1000Mbps speeds over CAT5
     copper cable, except for the SysKonnect SK-9D41 which supports only
     1000Mbps over multimode fiber.  The BCM570x builds upon the technology of
     the Alteon Tigon II.  It has two R4000 CPU cores and is PCI v2.2 and PCI-
     X v1.0 compliant.  It supports IP, TCP and UDP checksum checksum offload
     for both receive and transmit, multiple RX and TX DMA rings for QoS
     applications, rules-based receive filtering, and VLAN tag strip-
     ping/insertion as well as a 256-bit multicast hash filter.  Additional
     features may be provided via value-add firmware updates.  The BCM570x
     supports TBI (ten bit interface) and GMII transceivers, which means it
     can be used with either copper of 1000baseX fiber applications.  Note
     however the device only supports a single speed in TBI mode.

     Most cards also use the Broadcom BCM5401 or BCM5411 10/100/1000 copper
     gigabit tranceivers, which support autonegotiation of 10, 100 and
     1000mbps modes in full or half duplex.

     The BCM5700 also supports jumbo frames, which can be configured 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 performance for certain
     tasks, such as file transfers and data streaming.

     The bge 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

     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.  Only
                  full-duplex mode is supported.

     1000baseSX   Set 1000Mbps (gigabit ethernet) operation.  Both full-duplex
                  and half-duplex modes are supported.

     The bge driver supports the following media options:

     full-duplex  Force full duplex operation.

     half-duplex  Force half duplex operation.

     The bge driver also supports one special link option for 1000baseTX

     link0  With 1000baseTX cards, establishing a link between two ports
            requires that one port be configured as a master and the other a
            slave.  With autonegotiation, the master/slave settings will be
            chosen automatically.  However when manually selecting the link
            state, it is necessary to force one side of the link to be a mas-
            ter and the other a slave.  The bge driver configures the ports as
            slaves by default.  Setting the link0 flag with ifconfig(8) will
            set a port as a master instead.

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

     bge%d: couldn't map memory  A fatal initialization error has occurred.

     bge%d: couldn't map ports  A fatal initialization error has occurred.

     bge%d: couldn't map interrupt  A fatal initialization error has occurred.

     bge%d: no memory for softc struct!  The driver failed to allocate memory
     for per-device instance information during initialization.

     bge%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.

     bge%d: no memory for jumbo buffers!  The driver failed to allocate memory
     for jumbo frames during initialization.

     bge%d: watchdog timeout  The device has stopped responding to the net-
     work, or there is a problem with the network connection (cable).

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

     The bge device driver first appeared in FreeBSD 4.5.

     The bge driver was written by Bill Paul <>.

FreeBSD 4.10                  September 27, 2001                  FreeBSD 4.10


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