Re: Multiple gateways, changing Ips

[Nuno Branco <branco@markdata.pt>]

I don't know if this helps.

I had a similar problem just a few days ago, and the best solution i
could find was to rdr the new IP addresses to the new ones while the DNS
were propagating. Doing all this while using the old ISP.

After a few days, for DNS propagation, i changed the IPs in all the
machines where there was need to do so and remove the rdr on the border
(OpenBSD 3.1) and changed the default gateway to the new ISP.

On Thu, 2003-10-02 at 16:06, Marcus Bointon wrote:
> My colocation provider is changing ISPs, and this is going to involve IP
> address changes for my server (running OpenBSD 3.1-stable). I only have a
> single physical network connection with multiple IPs assigned. To minimize
> downtime, they are running both networks in parallel for a while. In order
> to set up the new network I have set up new forwarders on my DNS, added the
> same hosts to my resolv.conf, got apache ready to receive on the new IPs.
> The remaining big thing is to assign the new IPs in /etc/hostname.* and
> /etc/mygate. However, if I'm going to be able to run both networks at once,
> I effectively need two gateways, one for each network. I've been rummaging
> all over the place online and in man pages, and can't find anything that
> seems right - I mean, can I just put two addresses in mygate? Or will it
> just get confused or ignore the second gateway? Do I need to do some kind
of
> routing from one network to the other (they don't need to talk to each
other
> - just to respond individually)? For the actual new IPs in my hostname.*
> file do I add the new IPs as aliases like I have for addresses on my
> existing allocation? Ah, and of course I need to do all this via remote SSH
> only as physical access is difficult.
>
> Help!
>
> Thanks,
>
> Marcus

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