On 7/14/2010 1:22 PM, Rob Taylor wrote: > I would guess an issue with dual wan routers is the different IP > address's that both external interfaces would have. If you use NAT, then > outbound traffic shouldn't be much of an issue, as it could just get > NAT'ed to the other link(sessions going at the time of the cutover will > break when that happens), but inbound might be. > > I would guess that you could have off-site dns with a low ttl, and have > it give one of IP's of either wan interface, and when one fails, update > it to use the other interface. > > Anyone have any other ideas on how to do it? >
We have a Radware Linkproof at our location, although for various reasons we are planning to remove it. The Linkproof acts as the DNS server for whatever hosts you delegate to it (although I was unable to delegate a base domain name - I could do "host.foobar.com" but not "foobar.com"). You give the LP a permanent IP on each attached network, and delegate the hosts RR to both of them. It uses a TTL of 0 (perhaps settable), and will serve out the appropriate IP (round robin, priority, etc. based on if the link is considered up). It was a total pain to get configured the way you wanted it though, and asymmetric routing could be a pain if you aren't careful. -Brian _______________________________________________ bblisa mailing list [email protected] http://www.bblisa.org/mailman/listinfo/bblisa
