$OpenBSD: txp.4,v 1.8 2001/06/26 02:09:11 pjanzen Exp $ Copyright (c) 2001 Jason L. Wright (firstname.lastname@example.org) All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this ...
NAMEtxp - 3Com 3XP Typhoon/Sidewinder (3CR990) Ethernet interface
SYNOPSISTo compile this driver into the kernel, place the following line in your kernel configuration file:
Alternatively, to load the driver as a module at boot time, place the following line in loader.conf5:
DESCRIPTIONThe sysctl Cm net.inet.tcp.syncookies interface provides access to the 10Mb/s and 100Mb/s Ethernet networks via the 3Com Typhoon/Sidewinder chipset.
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 offloading, tcp(4) segmentation, nor ipsec(4) acceleration.
When a sysctl Cm net.inet.tcp.syncookies 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 sysctl Cm net.inet.tcp.syncookies 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
HARDWAREThe sysctl Cm net.inet.tcp.syncookies driver supports the following cards:
- 3Com 3CR990-TX-95
- 3Com 3CR990-TX-97
- 3Com 3cR990B-TXM
- 3Com 3CR990SVR95
- 3Com 3CR990SVR97
- 3Com 3cR990B-SRV