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From: gaige@ncsa.uiuc.EDU.UUCP
Newsgroups: comp.protocols.appletalk
Subject: Re: NCSA Telnet, KIP, and subnets
Message-ID: <8710301622.AA05292@lurch.ncsa.uiuc.edu>
Date: Fri, 30-Oct-87 11:22:08 EST
Article-I.D.: lurch.8710301622.AA05292
Posted: Fri Oct 30 11:22:08 1987
Date-Received: Tue, 3-Nov-87 01:22:08 EST
Sender: daemon@ucbvax.BERKELEY.EDU
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The current format for NCSA Telnet subnet masks is eight hexidecimal digits
indicating an actual bit mask for the IP number.  The most common example,
for a class B net with eight bits of subnetting is "ffffff00", which happens
to be the same as class A, sixteen bits of subnet.  Similarly, class A with
eight bits is "ffff0000."

It is important to note that if the kinetics box stradles subnets (has one
IP net number on the ethernet side and a different one on the AppleTalk side),
the AppleTalk side of the Kinetics box must be specified as a gateway in the
config.tel file.  An example of this is a KBox running the combined gateway from
kinetics with 128.174.20.1 Ethernet and 128.174.22.1 AppleTalk.  Assuming a
class B, eight bit subnet, the subnet mask would be "ffffff00" and the following
entry should be in the config.tel:

name=Kbox  hostip=128.174.22.1 gateway=1

I hope this helps,
Gaige B. Paulsen
National Center for Supercomputing Applications
University of Illinois

gaige@ncsa.uiuc.edu