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From: Jason White <jason@jasonjgw.net>
Subject: Re: ot, configuring ipv6 routing to tap device
Date: Mon, 18 May 2009 04:58:15 +0000 (UTC)
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Gregory Nowak  <speakup@braille.uwo.ca> wrote:

>For the purposes of my post, let's say I'm using the 2001:db8::/32
>address space, though I am in fact using a routed address
>space. Here's what I have, tap0 on the host is configured as
>2001:db8::1/32, and eth0 inside the vm is configured as
>2001:db8::2/32. If I use telnet from inside the vm to try to connect
>to the host, my lan, or the world, I get network is unreachable. If I
>run tcpdump on the tap0 interface on the host, I can see neighbor
>solicitations going out from the vm, but tap0 is as far as those
>packets go. 

Do you have tap0 configured in your /etc/radvd.conf file? If you want to send
it out a router advertisement, you'll need to have radvd running and
radvd.conf configured.

The ip command is the one to use if you need to set up static routes - see the
IPv6 HOWTO. You might also need to enable IPv6 forwarding in your kernel on
the host system.