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- Newsgroups: comp.protocols.appletalk
- Path: sparky!uunet!haven.umd.edu!darwin.sura.net!sgiblab!newsun!brianb@wc.novell.com
- From: brianb@wc.novell.com (Brian Bulkowski)
- Subject: Re: Novell servers running Internet Router
- Message-ID: <1992Sep5.002727.10444@novell.com>
- Sender: news@novell.com (The Netnews Manager)
- Nntp-Posting-Host: 130.57.64.121
- Organization: Novell Inc.
- References: <1992Sep3.043801.24066@gatech.edu>
- Date: Sat, 5 Sep 1992 00:27:27 GMT
- Lines: 80
-
- Hi,
- The real reason we designed it this way was two fold:
- 1) It was a heck of a lot easier to do in the time we had with the
- tools and source code bases we had. We had the AppleTalk router
- from the fastpath, we had (ancient, I've heard they've cleaned it up)
- Portable AppleTalk code from Apple. We had to mate the two together,
- an internal net was ideal.
- 2) To protect administrators from themselves. If AppleTalk homes on
- a particular card, then all AppleTalk services are slave to that card
- and network being up. By homing on an internal net, we can keep AppleTalk
- services up as cards are bound and unbound, as configuration changes.
-
- Since we realize that this isn't an ideal situation, a future release
- will include the ability to run without the router. Another configuration
- will allow routing, but the stack will be homed on a particular interface.
- But it was the best we could do at the time.
-
- WRT your feeling that the extra routers slow down a net - I don't think
- this is a real concern, unless you run with localtalk backbones. Even with
- 50 nets, that won't even get you three packets. Thus, for each router you
- generate 3 packets every 10 seconds, even without split horizon. If you had
- 10 servers on a backbone, we're talking 3 packets per second without split
- horizon, and probably 1 packet per second with. With NBP and all your servers
- in the same zone, things get a bit worse, since a FwdReq will be generated
- for each server, but if you split your zones humanely you wouldn't incur
- more than a few extra packets per lookup. With ZIP the only extra traffic
- is when a net goes up or down.
-
- The main reason that we found for everyone hating "router on always"
- was that a network number had to be assigned for each server. Thus, the
- far flung server, under some strange administrator, had to be more closely
- tied into the network administration. This is our main motovation for
- moving to the no-router case. I think the other problem, that people don't
- want extra router on their network, is based in fear of the unknown rather
- than real technical problems. I know of a network far worse, with about
- 50 Novell AppleTalk servers ON ONE NETWORK on ethertalk with T1 *repeaters*
- between the ethernet segments. 1200 devices in one network. And it works,
- mostly, and RTMP, ZIP, and NBP from the extra routers are the least of
- their worries.
-
- BTW, I find the terminology of "Novell Internet Router" confusing. Any
- router is, by Apple definition of the word, "Internet". It routes between
- two nets. However, it confuses with the Apple Product "Apple Internet Router",
- aka AIR. So, "AppleTalk Router" should be sufficient.
-
- I hope this clears up any confusion, and shows that Novell is answering
- the demands of the marketplace in this regard. We hear you!
-
- BrianB
- AppleTalk transport project lead
- brianb@wc.novell.com
-
- In article <1992Sep3.043801.24066@gatech.edu>, shahid@oit.gatech.edu (Shahid Sheikh) writes:
- >
- > Hi netters
- >
- > Can someone explain why a Novell Server has to run an AppleTalk Internet
- > Router in it. I know it runs one for IPX as well. But is there a real true
- > reason why it has to run the router for appletalk. It seems kind of silly
- > just to run an Internet router for one server and not being able to connect
- > any devices on the Appletalk subnet. Moreover, if you have about a hundred
- > routers already existing and you put like another 50 Novell servers on your
- > network, wont that significantly increase your RTMP and ZIT tables and slow
- > down the network?
- >
- > The response I've got from Novell so far is that they have designed the
- > multiprotocol support according to the ODI specifications which requires
- > them to run that router. Since when appletalk devices have to be designed
- > according to ODI standards? Is there a way around this router other than
- > not using the stupid Novell server at all? What kind of remote management
- > tools come with the Novell router? Does it support SNMP? Can I monitor and
- > control the router from a remote non-IPX device?
- >
- > Any information would be greatly appreciated.
- >
- > Shahid Sheikh
- > Network Services -- Georgia Tech
- > shahid@oit.gatech.edu
- >
- >
-