-----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 ...
Are you able to create ip6ip tunnels from your firewall/router to each customer? -- Matt Reath CCIE #27316 (SP) matt@mattreath.com | http://mattreath.com Twitter: http://twitter.com/mpreath