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- Path: sparky!uunet!ogicse!uwm.edu!ux1.cso.uiuc.edu!news.iastate.edu!IASTATE.EDU!mustang
- From: mustang@IASTATE.EDU (Daniel M Engholm)
- Newsgroups: comp.protocols.tcp-ip
- Subject: Re: Multiple End Systems Via One IP Address?
- Message-ID: <1992Aug19.201711@IASTATE.EDU>
- Date: 20 Aug 92 01:17:11 GMT
- Article-I.D.: IASTATE.1992Aug19.201711
- References: <1992Aug18.171150.13939@cis.ohio-state.edu>
- Sender: news@news.iastate.edu (USENET News System)
- Reply-To: mustang@IASTATE.EDU (Daniel M Engholm)
- Organization: Iowa State University
- Lines: 42
-
- In article <1992Aug18.171150.13939@cis.ohio-state.edu>, rhm@oclc.org (Robin
- Hermance-Moore) writes:
- > Can anyone point me to a commercially-available solution to this
- > problem?
- >
- > We are designing an application which will run on multiple Unix
- > systems & be accessible via TCP/IP. We would like to make these
- > systems available to users on the Internet using a single IP
- > address. Since the "application systems" all run pretty much
- > independently of each other, we envision something like this:
- >
- > Internet
- > |
- > [ Front ]
- > [ End ]
- > |
- > ---------------------------------
- > | | |
- > [ Appl ] [ Appl ] [ Appl ] ...
- > [ Host ] [ Host ] [ Host ]
- > [ # 1 ] [ # 2 ] [ # 3 ]
- >
- > [more information followed, but has been deleted]
-
- This probably won't help you in you ultimate quest, but I would like to
- describe a similar situation we have here. We have a terminal server (Xyplex)
- with fourteen 8-port serial cards. Each card is a separately managed device
- with a unique IP address. Xyplex has a product call the Rotary Domain Name
- Server which watches the use of multiple cards and determines which is least
- busy. When a user opens a telnet connection to the service "isn.iastate.edu",
- a query goes to the campus Domain Name Server, which consults
- "isn.rdns.iastate.edu" for the associated IP address. The RDNS replies with
- the address of the least busy card. The campus DNS has a time to live of zero,
- so the entry isn't cached.
-
- This solution has the benefit of not having a bottleneck with a single front-
- end system handling all the traffic. I hope this helps, even if just a little.
- --
- Dan Engholm | Internet: mustang@iastate.edu
- Telecommunications Engineer | US Mail: 95B Black Engineering Bldg.
- | Iowa State University
- (515)294-8414 | Ames, Iowa 50011-2163
-