RE: Question about migrating to IPv6 with multiple upstreams.

["Matthew Reath" <matt () mattreath com>]

> > -----Original Message-----
> > From: Matthew Reath [mailto:matt () mattreath com]
> > Sent: June-11-11 11:22 PM
> > To: Randy Carpenter
> > Cc: nanog () nanog org
> > Subject: Re: Question about migrating to IPv6 with multiple upstreams.
> >
> > Standard IP routing, the default gateway of the network can decide based
> > on a route entry whether to send it to the cable modem or send it to the
> > firewall.
>
> If the source block is not routed via both connections it won't work
> without
> NAT.  I had this same problem trying to use my ISP's native v6 over PPPoE
> and maintain a tunnel as backup since it was still pretty flaky as they
> were
> testing it at the time ... no way a residential ISP is going to route 3rd
> party blocks for all their customers, and no chance the tunnel provider
> was
> going to route the block my ISP assigned me either ... with no NAT66 in
> Tomato/ddWRT/etc it was 100% impossible to have multiple connections ...

I guess I'm a little confused on the setup. You have a firewall with a
connection to a local LAN, another connection to customer network(s), and
a third connection to the Internet via cable modem?

You have NAT setup to NAT your Local LAN out to the Internet and to the
customer network? A customer network device would use the outside IP on
the customer network connection to communicate with devices in the Local
LAN?

I think it makes more sense to me now.

--
Matt Reath
CCIE #27316 (SP)
matt () mattreath com | http://mattreath.com
Twitter: http://twitter.com/mpreath