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VJ>Moreover in order to emulate an ATM link, I think that Netgraph could
VJ>be used too to provide a virtual PIF. For example in order to emulate
VJ>an ATM link without any ATM board, a ng_HARPDEVICE node could provide
VJ>on one side a Netgraph hook and on the other side a HARP PIF (Physical
VJ>Interface). The Netgraph hook could be used over a UDP socket that
VJ>emulates the physical ATM link.

That's actually a nice idea. I see if I can do something like this.
Remembers me of some ATM over ethernet stuff from Bell Labs.
How would you multiplex the VCs on UDP/TCP?

VJ>Then what are the differences between your PCA200 driver and the HARP's
VJ>one ?

# uname -a
FreeBSD catssrv.fokus.gmd.de 5.0-CURRENT FreeBSD 5.0-CURRENT #18: Tue Jan
28 11:49:32 CET 2003     hbb@xxxxxxxxxxxxxxxxxxxx:/opt/obj/usr/src/sys/CATSSRV  sparc64
# ifconfig
	inet netmask 0xffffff00 broadcast
	ether 08:00:20:b5:d3:15
	media: Ethernet autoselect (100baseTX)
	status: active
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
	inet netmask 0xff000000
hatm0: flags=841<UP,RUNNING,SIMPLEX> mtu 9180
	media: ATM UTP/155MBit
	status: active
fatm0: flags=841<UP,RUNNING,SIMPLEX> mtu 9180
	media: ATM UTP/155MBit
	status: active
	inet netmask 0xffffff00 broadcast
	ether 00:a0:3e:23:02:00

harti brandt, http://www.fokus.gmd.de/research/cc/cats/employees/hartmut.brandt/private
              brandt@xxxxxxxxxxxxxxxxxxx, harti@xxxxxxxxxxx

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