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- Newsgroups: comp.unix.programmer
- Path: sparky!uunet!gatech!news.ans.net!cmcl2!panix!rayc
- From: rayc@panix.com (Ray Compton)
- Subject: Re: Problems when broadcasting (Yet More....)
- Message-ID: <1992Dec12.015723.26606@panix.com>
- Date: Sat, 12 Dec 1992 01:57:23 GMT
- References: <Bz3t52.Br2@gabriel.keele.ac.uk>
- Organization: League of American Wheelmen - the LAW
- Lines: 42
-
- In <Bz3t52.Br2@gabriel.keele.ac.uk> u0g78@keele.ac.uk (Martin Steed) writes:
-
- >Essentially I have 3 networks, each of which has several hosts on it.
-
- >Network 1 is a small network of Sparc IPX's and SparcStations
- >Network 2 is a network of a few SparcStation 2's and a Sequent Symmetry.
- >Network 3 is a large network containing many different machines.
-
- >One of the Sparc 2's on Network 2, is also on Network 1. The Sequent on
- >Network 2 is also on Network 3.
-
- >My dameon is running on a few machines on each network.
-
- >My client program broadcasts out onto all 3 networks, gathering responses.
-
- >If I start my client on Network 1, or Network 2 then it successfully gets
- >the replies I would expect, with a few exceptions, no host on Network 3
- >replies, and the Sequent on both Networks 2 and 3 does not respond.
-
- >If I start my client on Network 3, then it works fine and I get responses
- >back from all 3 Networks.
-
- >Investigating further, it would appear that packets going from either
- >Network 1 or Network 2, get no further than the sequent.
-
- [stuff deleted]
-
- I think your 3 network are using different flavors of broadcast addresses.
- SUN's (BSD based) use 0 broadcasting (192.a.b.0) where 'other' machines
- that aren't BSD based will use 1 broadcast (192.a.b.255). What is a
- broadcast to one net is a nulling netmask to another.
-
- I don't know what the Sequent is running, but try to force it to use 0
- or 1 as broadcast's (via ifconfig?? maybe??).
-
- Hope it helps,
- /rayc
- --
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- * magic o--> more magic | Ray Compton | "A waste, is a *
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-