netdev - Adding routes to another table: no such process

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Message-ID: <20120807141306.GB32655@zenon.in.qult.net>
Date:	Tue, 7 Aug 2012 16:13:06 +0200
From:	Ignacy Gawędzki <i@....fr>
To:	netdev@...r.kernel.org
Subject: Adding routes to another table: no such process

Hi,

I'm having a hard time setting some routes on a router and can't find any
relevant information anywhere, so I resort to asking on this list.

The router has one interface, say eth0, with configured address 10.0.0.1/32.

Now I would like to do:

  ip rule add from 10.0.0.1 table 100
  ip route add 10.0.0.2/32 dev eth0 table 100
  ip route add 10.0.0.3/32 via 10.0.0.2 table 100

but I get

  RTNETLINK answers: No such process

on the third command.  It's just as though the kernel refused to use a
gateway for which there's no route in the main table.  Is this an actual
requirement for gateways?  I could find some examples around the web setting
routes with gateways in other tables than main, but they obviously don't work,
yielding the same error message.

Thanks for your help.

Ignacy

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