[Openswan Users] Multiple left=AAA.BBB.CCC.DDD

Norman Rasmussen norman at rasmussen.co.za
Thu May 11 18:37:23 CEST 2006

> I have though about this thing as well recently.
> And looking forward to anyone's answer
> The thing that bothers me, is how openswan then should know that for
> instance, the main network link is down and it should use the second ip.
> I mean, let's assume situation that we have 2 WAN connections and one of
> them get's down. And I'd like openswan to switch the tunnel to the
> backup one and then to restore it when it's back again.
> However I'm still not sure if is not supposed to be a function of the
> routing itself.

You need to define 4 tunnels: A1-B1, A1-B2, A2-B1, A2-A2.  Then you
can use some other routing protocol to choose the 'best' tunnel based
on availability - hence the OSPF/BGP references.

- Norman Rasmussen
 - Email: norman at rasmussen.co.za
 - Home page: http://norman.rasmussen.co.za/

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