11-04-2003
Assumed your system not busy(command 'sar'). From my experience, it might be caused by setting half duplex of the connection. Check the router or switch setting first.
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TXP(4) BSD Kernel Interfaces Manual TXP(4)
NAME
txp -- 3Com 3XP Typhoon/Sidewinder (3CR990) Ethernet interface
SYNOPSIS
txp* at pci? dev ? function ?
DESCRIPTION
The txp interface provides access to the 10Mb/s and 100Mb/s Ethernet networks via the 3Com Typhoon/Sidewinder chipset. This driver supports
the following cards:
o 3Com 3CR990-TX-95
o 3Com 3CR990-TX-97
o 3Com 3CR990SVR95
o 3Com 3CR990SVR97
Basic Ethernet functions are provided as well as support for vlan(4) tag removal and insertion assistance, receive ip(4), tcp(4), and udp(4)
checksum offloading, and transmit ip(4) checksum offloading. There is currently no support for transmit tcp(4) or udp(4) checksum offload-
ing, tcp(4) segmentation, nor ipsec(4) acceleration. Note that hardware checksumming is only used when the interface is not in bridge(4)
mode.
Each of the host's network addresses is specified at boot time with an SIOCSIFADDR ioctl(2). The txp interface employs the address resolu-
tion protocol described in arp(4) to dynamically map between Internet and Ethernet addresses on the local network.
When a txp interface is brought up, by default, it will attempt to auto-negotiate the link speed and duplex mode. The speeds, in order of
attempt, are: 100Mb/s Full Duplex, 100Mb/s Half Duplex, 10 Mb/s Full Duplex, and 10 Mb/s Half Duplex.
The txp supports several media types, which are selected via the ifconfig(8) command. The supported media types are:
media autoselect
Attempt to autoselect the media type (default)
media 100baseTX mediaopt full-duplex
Use 100baseTX, full duplex
media 100baseTX [mediaopt half-duplex]
Use 100baseTX, half duplex
media 10baseT mediaopt full-duplex
Use 10baseT, full duplex
media 10baseT [mediaopt half-duplex]
Use 10baseT, half duplex
SEE ALSO
arp(4), ifmedia(4), inet(4), intro(4), ip(4), netintro(4), pci(4), tcp(4), udp(4), vlan(4), ifconfig(8)
HISTORY
The txp driver first appeared in NetBSD 2.0.
BSD
August 21, 2003 BSD