Re: Protocol Development on SUN 2 and 3 computers.


Bill Melohn (melohn@Sun.COM)
Tue, 16 Dec 86 10:01:55 PST


Speaking as an admittedly biased source, the Sun Datacomm group has
managed to implement OSI (MAP/TOP) with a minimum of kernel changes
using the basic protosw, ioctl facility, and even the routing table
routines from the standard SunOS. We also have implementations of X.25,
SNA, and DECnet which all use the ifnet structure to layer different
protocol instances on top of different datalinks (HDLC, SDLC, 802.x).
As you might expect, the farther your protocol is from the TCP/IP
model, the less useful the standard networking code will be.

If your goal is XNS under Unix, it makes sense to use the 4.3
implementation. As a general platform for protocol/network
development, we believe SunOS offers most of the facilities you
need.



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