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VGE(4)		       FreeBSD Kernel Interfaces Manual			VGE(4)

     vge -- VIA	Networking Technologies	VT6122 PCI Gigabit Ethernet adapter

     device miibus
     device vge

     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
     external PHY.)  The MAC supports TCP/IP hardware checksums	(IPv4 only),
     TCP large send, VLAN tag insertion	and stripping, as well as VLAN filter-
     ing, 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
     using 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

     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

     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 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).

     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)

     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).

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

     The vge device driver first appeared in FreeBSD 5.3.

     The vge driver was	written	by Bill	Paul <>.

FreeBSD	11.1		      September	10, 2004		  FreeBSD 11.1


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