Subject: Re: ATM NIC support
To: tech-net@NetBSD.ORG, Ty Sarna <>
From: Matthias Drochner <>
List: tech-net
Date: 02/27/1997 18:56:58
Excerpts from netbsd: 27-Feb-97 Re: ATM NIC support Ty (1131)

> Does Ignatious' ARP work help at all for this, or is ATMARP something
> very different (I'm fairly ignorant about ATM)?

The ATMARP as used for CLIP (RFC1577) uses the same structure
as the well-known arp.
(There are special opcodes because for ATM a resolution
of hardware addresses to protocol addresses is needed -
called InARP.)

I hope Ignatious' work will ease support for ATMARP.

But i consider it not easy to put ATMARP into the existing ATM
framework. CLIP is only one option how to use ATM connections.
IMHO there is a layer necessary between ATM and the IP
encapsulation which multiplexes between the different uses of
ATM VCs. It's a challenge to implement this without performance

There is a special ARP variant fir LAN emulation (LEARP)
which is rather different.

best regards
Matthias Drochner