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From: bert hubert <ahu@ds9a.nl>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] route with different metric
Date: Wed, 26 Sep 2001 13:13:59 +0000	[thread overview]
Message-ID: <marc-lartc-100151001615330@msgid-missing> (raw)
In-Reply-To: <marc-lartc-100150978014261@msgid-missing>

On Wed, Sep 26, 2001 at 03:10:35PM +0200, Christian Lox wrote:
> Hi everyone!
> 
> Sorry if this is a FAQ but I did not find a searchable archive.
> 
> What I am planning to do:
> 2 different connections to 2 different ISPs.
> One is handled by an ISDN card, one via ethernet to their router
> (DSL).
> We want to use the DSL line; only if this fails we need the ISDN
> line.
> I played around with the metrics but could not get it to work.

This *will* be an FAQ soon! It's by far the most asked question. The short
answer is: you are out of luck. There is no way to reliably automate this.

The best solution found so far is to check in a cron script which connection
is up, and in case of problems, run something like 'ip route replace default
via 1.2.3.4 dev ppp0' or 'ip route replace default via 4.3.2.1 dev eth1'.

There are more interesting solutions but they are not easy. There is
something called 'dead gateway detection'. You may experiment with:

# ip route add default nexthop 1.2.3.4 dev ppp0 nexthop 4.3.2.1 dev eth1

If that works as intended, please let us know!

Regards,

bert hubert

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  reply	other threads:[~2001-09-26 13:13 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-09-26 13:10 [LARTC] route with different metric Christian Lox
2001-09-26 13:13 ` bert hubert [this message]
2001-09-26 13:39 ` Christoph Simon
2001-09-26 13:45 ` Juri Haberland
2001-09-26 13:53 ` Juri Haberland
2001-09-26 14:10 ` bert hubert
2001-09-26 14:37 ` Juri Haberland
2001-09-26 18:05 ` Adrian Chung
2001-09-26 20:53 ` bert hubert
2001-09-26 21:16 ` Adrian Chung
2001-09-27  7:44 ` Juri Haberland
2001-09-27 22:40 ` Adrian Chung

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