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VGE(4)			 BSD Kernel Interfaces Manual			VGE(4)

NAME
     vge -- VIA	Networking Technologies	VT6122 PCI Gigabit Ethernet adapter
     driver

SYNOPSIS
     device miibus
     device vge

DESCRIPTION
     The vge driver provides support for various NICs and embedded Ethernet
     interfaces	based on the VIA Networking Technologies VT6122	Gigabit	Ether-
     net controller chips.

     The VT6122	is a 33/66Mhz 64-bit PCI device	which combines a tri-speed MAC
     with an integrated	10/100/1000 copper PHY.	(Some older cards use an ex-
     ternal PHY.)  The MAC supports TCP/IP hardware checksums (IPv4 only), TCP
     large send, VLAN tag insertion and	stripping, as well as VLAN filtering,
     a 64-entry	CAM filter and a 64-entry VLAN filter, 64-bit multicast	hash
     filter, 4 separate	transmit DMA queues, flow control and jumbo frames up
     to	16K in size.  The VT6122 has a 16K receive FIFO	and 48K	transmit FIFO.

     The vge driver takes advantage of the VT6122's checksum offload and VLAN
     tagging features, as well as the jumbo frame and CAM filter support.  The
     CAM filter	is used	for multicast address filtering	to provide 64 perfect
     multicast address filter support.	If it is necessary for the interface
     to	join more than 64 multicast groups, the	driver will switch over	to us-
     ing the hash filter.

     The jumbo frame support can be enabled by setting the interface MTU to
     any value larger than the default of 1500 bytes, up to a maximum of 9000
     bytes.  The receive and transmit checksum offload support can be toggled
     on	and off	using the ifconfig(8) utility.

     The vge 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.

     The vge driver supports the following media options:

     full-duplex  Force	full duplex operation.

     half-duplex  Force	half duplex operation.

     The vge driver also supports one special link option for 1000baseTX
     cards:

     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 vge	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).

HARDWARE
     The vge driver supports VIA Networking VT3119 and VT6122 based Gigabit
     Ethernet adapters including:

     +o	 VIA Networking	LAN-on-motherboard Gigabit Ethernet
     +o	 ZyXEL GN650-T 64-bit PCI Gigabit Ethernet NIC (ZX1701)
     +o	 ZyXEL GN670-T 32-bit PCI Gigabit Ethernet NIC (ZX1702)

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

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

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

     vge%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.

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

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

HISTORY
     The vge device driver first appeared in FreeBSD 5.3.

AUTHORS
     The vge driver was	written	by Bill	Paul <wpaul@windriver.com>.

BSD			      September	10, 2004			   BSD

NAME | SYNOPSIS | DESCRIPTION | HARDWARE | DIAGNOSTICS | SEE ALSO | HISTORY | AUTHORS

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