Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!uwm.edu!wuarchive!zaphod.mps.ohio-state.edu!rpi!uupsi!sunic!tut!tut!jh From: jh@tut.fi (Juha Heinanen) Newsgroups: comp.protocols.tcp-ip Subject: Re: Can subnets be separated by another net? Message-ID: Date: 10 Jul 90 14:42:09 GMT References: <9007090939.AA11396@decpa.pa.dec.com> <9007091856.AA01804@cincsac.arc.nasa.gov> <1990Jul10.003628.5859@spectrum.CMC.COM> Sender: news@funet.fi (#News ) Organization: Tampere Univ. of Technology, Finland. Lines: 22 In-Reply-To: lars@spectrum.CMC.COM's message of 10 Jul 90 00:36:28 GMT In article <1990Jul10.003628.5859@spectrum.CMC.COM> lars@spectrum.CMC.COM (Lars Poulsen) writes: Thus, for "commercial use" the simple, practical and almost true answer is that disjoint subnets are not allowed. Depends what you mean by "commercial use". If an organization that previously has had its own IP backbone decides to become a user of a commercial IP backbone then the situation is excatly such that would call for connecting geographically separate subnets over another network. If this can't be done then the commercial backbone operator is not likely to get the customer. In Finland, for example, the commercial DataNet IP backbone will certainly switch from IGRP to OSPF for this very reason alone if it really can solve the acute problem. In the ISO world of NSAP addresses each organization can have several so called routing domains which could be assigned one for each separate network component. -- -- Juha Heinanen, Tampere Univ. of Technology, Finland jh@tut.fi (Internet), tut!jh (UUCP), jh@tut (Bitnet)