Question about migrating to IPv6 with multiple upstreams.

Matthew Reath matt at
Sun Jun 12 03:21:32 UTC 2011

> I have an interesting situation at a business that I am working on. We
> currently have the office set up with redundant connections for their
> mission critical servers and such, and also have a (cheap) cable modem for
> general browsing on client machines.
> The interesting part is that the client machines need to access some
> customer networks via the main redundant network, so we have a firewall
> set up to route those connections via the redundant connections, and
> everything else via the cheaper, faster cable modem. NAT is used on both
> outbound connections.
> With IPv6, we are having some trouble coming up with a way to do this.
> Since there is no NAT, does anyone have any ideas as to how this could be
> accomplished?
> In a nutshell: how do you have 2 upstream connections, and choose between
> them based on outbound destination?
> thanks,
> -Randy

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

Matt Reath
CCIE #27316 (SP)
matt at |

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