From owner-freebsd-atm  Sun Feb  9  9:44:47 2003
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Date: Mon, 10 Feb 2003 02:44:44 +0900 (JST)
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To: arr@watson.org
Cc: atm@FreeBSD.ORG
Subject: Re: New version of ngATM
From: Kenjiro Cho <kjc@csl.sony.co.jp>
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References: <3E26DAA600DC2A2B@mel-rta10.wanadoo.fr>
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Andrew R. Reiter wrote:
> Anyone actually use netnatm from Cranor?  So far I see people stepping up
> for HARP and ngATM, so just curious to hear from those netnatm folks.

back in the late 90s, networking research people needed the cranor
driver for 2 reasons.

(1) IPv6:
	HARP internally has code specific to IPv4 and wasn't easy to
	use for IPv6-ready networks.
(2) returning ENOBUFS on buffer overflow:
	HARP silently discards packets when the device buffer becomes
	full.  backpressure by ENOBUFS to the upper layers was
	critical to the performance under heavy load.

I don't know how many people are still using the cranor driver since
the supported ATM NICs are not available on the market and ATM isn't
so popular in the networking research community these days.

-Kenjiro

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