Re: Single carrier multi-circuit asynchronous routing issue

[Anders Lindbäck <list-only () dnz se>]

On 7 jan 2009, at 21.05, Niels Bakker wrote:

> * aaron.millisor () bright net (Aaron Millisor) [Wed 07 Jan 2009,  
> 20:53 CET]:
> [..]
> > If I were to prepend the network 1.1.1.0 to come in on 'sprint 1',  
> > but have a route to 2.2.2.0 via 'sprint 2' so that traffic comes  
> > in on one circuit but returns on the other, routing is broken. If  
> > I change my route so that packets directed to 2.2.2.0 return on  
> > the same circuit that the traffic is received on, everything works  
> > fine.
>
> You might be running into uRPF (unicast reverse path forward  
> verification).
>
>
>         -- Niels.

Strict-mode uRPF will couse this, I am sure sprint support can help  
you with it..

------------------------------
Anders Lindbäck
anders.lindback () dnz se