ATMDUMP(8)

💖 ATMDUMP — capture or generate ATM cells 💖

okay bestie, welcome to the manual page for atmdump, which lives in section 8 of the maintenance commands. she's a whole vibe, she's iconic, and she is about to let you vibe with raw ATM cells. let's go 🦋

✨ SYNOPSIS ✨

atmdump [-i] [ -t type [-g gfc] [-c] ] [itf.]vpi.vci

🌸 DESCRIPTION 🌸

atmdump captures or generates single ATM cells, aka "AAL0" — the raw, unfiltered, no-makeup version of ATM. periodt. 💅

When she's in capture mode, she shows you three things for each cell:

• a time stamp ⏰
• the contents of the cell header 🎀
• a hex dump of the cell payload 🔍

When she's in send mode, you get to set:

• the payload type
• the generic flow control (GFC)
• the cell loss priority (CLP)

In both modes of operation, you absolutely have to specify the interface number, the VPI, and the VCI. no skipping, bestie, it's giving mandatory 💀

When sending, atmdump expects the cell payload to come in on standard input. and listen — if only less than 48 bytes can be read, the rest of the space gets padded with zero bytes. she fills in the gaps, she's thoughtful like that 🫶

🎀 OPTIONS 🎀

• -i — displays timestamps as the interval since the last cell reception. by default you get the absolute time instead. this option is ignored in transmit mode (yes, the original says "this options", we're keeping the lore, don't @ me 🙈).
• -t type — selects transmit mode and specifies the payload type. want the list of valid payload type numbers? just invoke atmdump with no arguments at all and she'll hand it over ✨
• -g gfc — specifies the value of the GFC field. gfc has to be in the range from 0 to 15, and the default is zero. respect the range bestie, no cap 🚧
• -c — sets the cell loss priority flag, which marks the cell as low priority. by default, CLP is not set.

🚨 RESTRICTIONS 🚨

Some device drivers may not pass OAM cells transparently. so if your OAM cells are acting mysterious, it might not be you — it's the driver. 😭

👑 AUTHOR 👑

Werner Almesberger, EPFL ICA <Werner.Almesberger@epfl.ch> — the icon, the legend, the moment 💜

🌈 SEE ALSO 🌈

• atmdiag(8)
• clip(8)
• sonetdiag(8)

go read those too, they're all in the family 🧚

and that's the whole page, bestie!! this one's from Linux, dated April 26, 2000 — shoutout to the source and version for keeping it real all these years 💖✨🎀