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- From: ip_boss@degsyd.syd.deg.csiro.au (Jack Churchill)
- Newsgroups: comp.unix.ultrix
- Subject: Re: Need help with routed
- Message-ID: <1992Aug22.181713.148@degsyd.syd.deg.csiro.au>
- Date: 22 Aug 92 18:17:12 +1000
- References: <Bt596M.H1G@adasoft.ch> <2A9031FB.21878@orion.oac.uci.edu> <Bt5wFx.HpJ@adasoft.ch>
- Organization: CSIRO, Exploration Geoscience
- Lines: 42
-
- In article <Bt5wFx.HpJ@adasoft.ch>, jw@adasoft.ch (Jamie Watson) writes:
- > Thanks for the several replies and suggestions I have already received
- > on this. I need to add the following clarification.
- >
- > Many of the local nets have more than one router. I have already
- > figured out how to use /etc/route to add a default gateway, but
- > this does not solve the most difficult part of the problem. When
- > there is more than one router, on installing a system I start
- > routed and look at the resulting routing table. I then try to
- > pick the "best connected" router - that is, the one with the
- > most connections to other nets that we need to reach, and I put
- > a command in rc.local to enter it as the default net gateway.
- > The problem is that the routers themselves go down sometimes,
- > and when that happens I need to have routed running to be able
- > to dynamically find a new gateway.
- >
- > Here is an example of a particularly nasty case. I have a system,
- > call it "goofy", connected to a local net with a lot of routers.
- > When I run routed, I see at least five or six different gateways
- > in the list. I pick the best candidate, say "111.22.3.4", and
- > add it as a default gateway. Now, "goofy" needs to talk to
- > another of our systems, "dopey", which is on a different net,
- > and the gateway I have used as the default doesn't talk to that
- > particular net. When goofy tries, it gets a redirect command
- > from the default, telling it (for example), to use 111.22.3.3.
- > At this point, goofy *automatically* adds a routing table entry
- > for the host "dopey", gateway "111.22.3.3". If at any time after
- > this that gateway goes down, goofy just keeps trying to use the
- > same gateway, and I can't reach dopey any more. I have to either
- > wait for it to come back up, or manually delete the entry, at
- > which point the next attempt will get another redirect, via some
- > other gateway, and it works again.
- >
- > Any more suggestions (I hope?)
- >
- > jw
- --
- Jack N. Churchill | jack@syd.deg.csiro.au
- CSIRO Division of Exploration Geoscience | churchill@decus.com.au
- PO Box 136 North Ryde NSW 2113 | Phone: +61 2 887 8884
- Australia | Fax: +61 2 887 8909
- ** Unless otherwise specified, the opinions expressed here are my own. **
-