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- Path: news.muc.de!hwg!heinz
- Subject: Re: Envoy + AmiTCP?
- Newsgroups: comp.sys.amiga.networking
- References: <4kes1s$1dgk@columba.udac.uu.se> <0lOlNv200YUg0HxUY0@andrew.cmu.edu> <STEFAN.BECKER.96Apr10150311@sasw41.nmp.nokia.com>
- Organization: Private
- X-Newsreader: TIN [AMIGA 1.3 950726BETA PL0]
- From: heinz@hwg.muc.de (Heinz Wrobel)
- Message-ID: <heinz.17ud@hwg.muc.de>
- Date: Wed, 17 Apr 96 20:24:54 GMT
-
- Stefan Becker (Stefan.Becker@nmp.nokia.com) wrote:
- >You are confusing multicasting with SANA2 packet filters. The driver
- >has to support these packet filters in order to be able to separate IP
- >packages for different protocol stacks.
-
- And you are confusing S2R2 packet filtering with S2R2 multiple
- protocol stack support. :-) The former is an optional optimization for
- packet handling to reduce CPU load by the stack and the latter is a
- required feature if multiple protocol stacks unaware of each other
- need to be able to handle the same packet types coming from a
- single driver.
-
- packet filtering:
-
- Give the stack a chance to reject a packet before it is entered
- into the actual read processing of the stack.
-
- multiple protocol stack support:
-
- each stack/opener receives a copy of any incoming packet
- matching a respectively pending request.
-
- Drivers without multiple protocol stack support will return an
- incoming packet only to one opener having a matching request,
- usually the first one. These drviers have been obsolete now for a
- long time. Complain to the manufacturer if you have problems
- with one of those.
-
- The easiest way to get a TCP/IP stack and Envoy to coexist is
- simply to use an S2R2 multiple protocol stack supporting driver.
- Correct functionality of the driver might be hard to verify though
- and old Envoy versions unfortunately did not generate or handle IP
- according to RFC. Even Envoy 2.0b is not absolutely perfect here.
- So the second easiest way may be the better one for many. The
- second easiest way is to change the packet numbers used for IP and
- ARP in Network Configuration of the involved Envoy nodes to
- something different than the TCP/IP stack defaults.
-
- Hopefully all these problems will disappear before the end of this
- year.
-
- --
- Heinz Wrobel Private Mail: heinz@hwg.muc.de
- My private FAX: +49 89 850 51 25, I prefer email
-