VGE(4) OpenBSD Programmer's Manual VGE(4)NAMEvge - VIA VT6122 PCI 10/100/Gigabit Ethernet device
SYNOPSIS
vge* at pci?
ciphy* at mii?
ipgphy* at mii?
DESCRIPTION
The vge driver provides support for various NICs and embedded Ethernet
interfaces based on the VIA Networking Technologies VT6122 Gigabit
Ethernet controller chips, including the following:
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)
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 IPv4 transmit/receive IP/TCP/UDP
checksum offload, VLAN tag insertion and stripping, 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 IPv4 transmit/receive IP/TCP/UDP
checksum offload, VLAN tag insertion and stripping, and the 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 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 the appropriate hostname.if(5) file.
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.
1000baseT Set 1000baseT operation over twisted pair. Both 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.
For more information on configuring this device, see ifconfig(8).
SEE ALSOarp(4), ciphy(4), ifmedia(4), intro(4), ipgphy(4), netintro(4), pci(4),
hostname.if(5), ifconfig(8)HISTORY
The vge device driver first appeared in OpenBSD 3.7.
AUTHORS
The vge driver was written by Bill Paul <wpaul@windriver.com> and ported
to OpenBSD by Peter Valchev <pvalchev@openbsd.org>.
OpenBSD 4.9 October 31, 2009 OpenBSD 4.9
