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- From: amfahr@taligent.com (Jeff Amfahr)
- Newsgroups: comp.protocols.appletalk
- Subject: Re: AARP details clarification needed.
- Message-ID: <amfahr-200892101924@ditka.taligent.com>
- Date: 20 Aug 92 17:30:02 GMT
- References: <1992Aug20.132650.6380@abbott.com>
- Sender: usenet@taligent.com (More Bytes Than You Can Read)
- Followup-To: comp.protocols.appletalk
- Organization: Taligent
- Lines: 78
-
- In article <1992Aug20.132650.6380@abbott.com>, larry@abtlabs.uucp (Larry
- Pajakowski) wrote:
- >
- >
- > Help.
- >
- > We have had a number of AARP storms and some of the network folks are
- > attempting to understand what has been happening. I'm posting this for
- > them. Your replys will be appreciated.
- >
- > As usual if there is sufficient interest I'll mail or post a summary.
- >
- > TNX
- >
- > Larry Pajakowski
- > Abbott Labs.
- > larry@turing.abbott.com (real e-mail address)
- >
- > ______________________________________________________________________
- >
- >
- >
- > We need definitive answers to the following list of questions. Most
- > require exact parameter values, that should be publicly known, but which are
- > not in Apple's Phase 2 "Inside AppleTalk" book. Some have definite values
- > that are dependent upon the implementation for a given protocol stack.
- > Where this is the case, please provide values and their associated protocol
- > stacks. If known, please also provide any values suggested by Apple for
- > developers. Apple has been unable to answer these questions--at least in
- > the 8 days they've had to respond so far. Where appropriate, I've included
- > in parentheses (chapter-page) the page number reference in "Inside
- > AppleTalk, 2nd Edition" where the topic occurs.
- >
- >
- > 1. What is the typical size of an Address Mapping Table, or how many
- > entries can the AMT hold before old entries are purged to make room for new
- > ones? [book just says there is a "cache" of mappings] (2-7)
- >
- This varies from implemtation to implematation.
- > 2. How many AARP Probe packets must be broadcast by the protocol stack
- > attempting to verify that its tentative protocol address is not in use by
- > any other node on the data link? [the book just says "a number" of probe
- > pkts] (2-7)
- >
-
- Inside AppleTalk states that for EtherTalk and TokenTalk there are 10
- packets sent out 1/5 second apart
-
- > 3. From book: "If [an AARP] Response packet is not received "within a
- > specified time interval," then AARP retransmits the Request packet.
- > The question is, WHAT is the value of the time-out interval mentioned
- > above? How long must AARP wait before retransmitting the Request
- > packet? (2-8)
- >
- > And how MANY retries are attempted? [book says just "a specified maximum
- > number of times] (2-8)
- >
- > 4. What is the timeout value that is allowed to expire before an AMT entry
- > is aged? (2-10)
- >
- > 5. Does a Macintosh end-node send the equivalent of a DECnet end-node's
- > HELLO packet to refresh its router's AMT?
- >
- If by end-node you mean a non-router, then the answer is no. A router is
- suppose to send out RTMP packets periodiacly.
-
- > 6. Does a Macintosh end-node maintain an AMT? If so, what is its size, or
- > how many entries can it hold?
- An end-node definitly mainatins an AMT. Its size is dependent on the link
- implemantation (i.e., Apple does not supple AARP for you since it is link
- dependent.
-
- Hope this info helps
-
- Jeff Amfahr
- Taligent
-
- These opinions are mine. But they can be yours for a price.
-