Forcing a packet through an interface (OT?)

[Chad Leigh -- Shire.Net LLC]

On Jul 11, 2005, at 5:26 PM, Mario Lobo wrote:

> Forgive me if this is off-topic.
>
> How could I force a packet to go out through an interface,
> despite the default route?
>
> Suppose I have two interfaces connected to the internet:
>
> 1) rl0 (real.ip.no.1) ---> ISP x
>
> 2) rl1 (real.ip.no.2) ---> ISP y
>
> ISP y is just a backup link. ISP x is the working link.
> Don?t want to load-balance them.  Use 2) ONLY if 1) is out.
>
> Suppose 1) is down. I switch to 2). But I have to keep testing 1)
> to see when it comes back up. How could I force a packet (ping maybe?)
> to www.whatever.com through 1), despite the default route being 2) ?
>
> I am aready binding the ping packet to the IP I want but that?s not  
> enough.


If #1 still has an address associated with it, ping something in that  
same subnet -- like the ISPs router -- that should force the packet  
out #1

Chad

---
Chad Leigh -- Shire.Net LLC
Your Web App and Email hosting provider
chad at shire.net