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BGE(4)			 BSD 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 ap-
     plications, rules-based receive filtering,	and VLAN tag stripping/inser-
     tion 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 de-
     vice 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 re-
	    quires 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 <>.

BSD			      September	27, 2001			   BSD


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