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Article View: comp.protocols.appletalk
Article #4029

Re: CAP and Class B subnets

#4029
From: Tom Evans
Date: Thu, 21 Jan 1993 06:52
34 lines
1837 bytes
In article <9301201802.AA12934@pangea.Stanford.EDU>, farrell@PANGEA.STANFORD.EDU (Phil Farrell) writes:
> Doug Neuhauser writes:
> > A friend want to run CAP on a Sun that is connected to a Class A network
> > which is subnetted to a Class B address (eg netmask of 255.255.0.0).
> > 	The Fastpath is address:	X.Y.Z.W
> > 	The sun is address:		X.Y.A.B
> > eg only the top 2 octets match.
> 
> I have exactly the situation you describe running here in my department.

The best way that I've found to "visualise" this problem (and the
solution to it) is to work along the following lines:

	A Class "C" Subnet maps directly to one AppleTalk (IPTalk) network,

	A Class B Subnet contains 254 (255? 256?) Class C Subnets,

	Therefore a Class B Subnet potentially contains 254 AppleTalk
	networks. All you have to do is to name them (i.e. allocate
	network numbers for each IP address that has the third octet
	different).

After having "named" them on your whiteboard, transfer the
information (the AppleTalk network number, IP subnet number and zone
name) to your atalkatab file and reboot the gateways.

========================
Tom Evans  tom@wcc.oz.au
Webster Computer Corp P/L, 1270 Ferntree Gully Rd Scoresby, Melbourne 3179
Victoria, Australia 61-3-764-1100  FAX ...764-1179  A.C.N. 004 818 455

wcc@cup.portal.com, AppleLink: "WEBSTER.USA"
2109 O'Toole Avenue, Suite J SAN JOSE CA 95131 - 1303 CALIFORNIA
1-408-954-8054  FAX 1-408-954-1832  AppleLink WEBSTER.USA
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Message-ID: <2948@wcc.oz.au>
Path: arc1-ca.pugleaf.net!sparky!uunet!munnari.oz.au!wcc!tom
References: <9301201802.AA12934@pangea.Stanford.EDU>

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Path: arc1-ca.pugleaf.net!sparky!uunet!munnari.oz.au!wcc!tom
From: tom@wcc.oz.au (Tom Evans)
Newsgroups: comp.protocols.appletalk
Subject: Re: CAP and Class B subnets
Message-ID: <2948@wcc.oz.au>
Date: 21 Jan 93 06:52:37 GMT
References: <9301201802.AA12934@pangea.Stanford.EDU>
Organization: Webster Computer Corp, Melbourne, Australia
Lines: 35