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- Path: sparky!uunet!cs.utexas.edu!sun-barr!ames!data.nas.nasa.gov!taligent!apple!macwinders.support.apple.com!user
- From: winders@aux.support.apple.com (Scott Winders)
- Newsgroups: comp.protocols.appletalk
- Subject: Re: CLAIM: Seed Routers are not Nodes
- Message-ID: <winders-191192110001@macwinders.support.apple.com>
- Date: 19 Nov 92 19:22:57 GMT
- References: <chris.722141659@ph-meter.beckman.uiuc.edu>
- Sender: daemon@Apple.COM
- Followup-To: comp.protocols.appletalk
- Organization: Apple Computer, Inc.
- Lines: 54
-
- In article <chris.722141659@ph-meter.beckman.uiuc.edu>,
- chris@ph-meter.beckman.uiuc.edu (Chris Gressley) wrote:
- >
- >
- >
- > The manufacturer of our routers has made a very strange claim
- > concerning their implementation of AppleTalk. I think I can cite the
- > passages in Inside AppleTalk which show that they are just implementing
- > this incorrectly, but I could use a direct quote from a Tech Note or
- > Inside AppleTalk, or an answer from an Apple person, which would show
- > definitively that they are wrong, or alternatively that I am wrong and
- > the router folks are correct.
- >
- > The folks who make our routers make the following two claims:
- >
- > 1. A "router" is not a "node". Nodes and routers are distinct sorts of
- > things.
- >
- > 2. Since a router is not a node, if a router is a seed router, it need
- > not dynamically acquire a node ID but can instead have one statically
- > assigned, since a seed router has statically assigned port descriptor
- > information.
- >
- > I am trying to configure the backbone network that the routers share
- > with the campus backbone so that all of the routers are seed routers.
- > Because of this, two of my routers are trying to use identical node
- > IDs, which all in all is a very bad thing.
- >
- > Am I totally confused, or is it true that:
- >
- > (a) A router is in fact a node.
- >
- > (b) Because a router is a node, it should follow the rules for node
- > number acquisition.
- >
- > Any authoritative source on this would be greatly appreciated.
- >
-
- 1. AppleTalk routers are indeed nodes. They have an AppleTalk network
- number and a node ID associated with them for each port. The glossary
- of "Inside AppleTalk, Second Edition" says that a node is "a data-link
- addressable entity on a network" and that an internet router is "an
- intelligent node that connects AppleTalk networks". Based on this, it
- is safe to say that a router is a node.
-
- 2. All AppleTalk nodes need to aquire their network address dynamically.
- There are no if, ands, or butts on this particular question. If the
- network addresses are assigned statically, you may have the problem you
- describe with your two seed routers.
-
- Scott Winders
- winders@aux.support.apple.com
-
- "My opinions are my own, not my employer's"
-