TXP(4)

💖 TXP 💖

okay bestie, so this is a page from the Kernel Interfaces Manual — it's the txp one, and we're gonna get you fluent in it in like two minutes, no cap.

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✨ NAME ✨

txp — the 3Com 3XP Typhoon/Sidewinder (3CR990) Ethernet interface 🌈

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✨ SYNOPSIS ✨

so like, there are two ways to get this driver in your life, and you gotta pick one 🫶

option one: bake it into the kernel. drop this exact line into your kernel configuration file:

device txp

option two: load it as a module at boot time. in that case you put this exact line into loader.conf(5):

if_txp_load="YES"

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💀 DEPRECATION NOTICE 💀

bestie. sit down. 🫂 the txp driver is not present in FreeBSD 13.0 and later. she's gone, she's retired, she left the group chat. see https://github.com/freebsd/fcp/blob/master/fcp-0101.md for more information.

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🌸 DESCRIPTION 🌸

the txp interface gives you access to 10Mb/s and 100Mb/s Ethernet networks through the 3Com Typhoon/Sidewinder chipset. iconic hardware era honestly 🎀

you get the basic Ethernet functions, plus:

• support for vlan(4) tag removal and insertion assistance ✨
• receive ip(4), tcp(4), and udp(4) checksum offloading
• transmit ip(4) checksum offloading

and now the part where I have to be the bearer of bad news 😭 — there is currently no support for:

• transmit tcp(4) or udp(4) checksum offloading
• tcp(4) segmentation
• ipsec(4) acceleration

so, yeah. not everything, but she does what she does 💅

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🦋 link speed & duplex 🦋

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:

1. 100Mb/s Full Duplex
2. 100Mb/s Half Duplex
3. 10 Mb/s Full Duplex
4. 10 Mb/s Half Duplex

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🎀 media types 🎀

the txp supports several media types, and you select them with the ifconfig(8) command. here's the full lineup, periodt:

• media autoselect — attempt to autoselect the media type (this is the default, bestie 👑)
• 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

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🔥 HARDWARE 🔥

the txp driver supports these cards, and honestly the whole squad is here:

• 3Com 3CR990-TX-95
• 3Com 3CR990-TX-97
• 3Com 3cR990B-TXM
• 3Com 3CR990SVR95
• 3Com 3CR990SVR97
• 3Com 3cR990B-SRV

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👀 SEE ALSO 👀

altq(4), arp(4), inet(4), intro(4), ip(4), miibus(4), tcp(4), udp(4), vlan(4), ifconfig(8)

go read those too, iykyk 📚✨

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🧚 HISTORY 🧚

the txp driver first appeared in OpenBSD 2.9. a true elder icon 💜

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and that's the whole page, bestie 🫶 this one came from the Debian folks and it's dated October 24, 2018 — so if you're reading this in your terminal, just know the vibe was immaculate and the facts are unchanged. slay 💅✨