[c-nsp] Is there anyway to adjust the administrative distance for 'connected'?

[Tony Li]

On Feb 14, 2008, at 5:27 PM, Drew Weaver wrote:

> This may sound like an odd question, but I was just curious if  
> there is any way to adjust the administrative distance for  
> 'connected'?
>
> I'm trying to make it impossible for hosts whom are 'blackholed' to  
> even send traffic to their 'default gateway' or hosts whom are  
> connected to the same 'distribution' switch that the blackholed  
> host are connected to. The Blackhole routes have an administrative  
> distance of 1 currently and as we all know normally 'connected  
> networks' have an AD of 0.
>
> Does anyone know of a way to do this? The Blackhole works fine at  
> the edge of the network where the routes are distributed via OSPF  
> but I wanted to also prevent traffic from traversing the  
> distribution switches to the edge just to be blackholed (seems like  
> a waste of resources).


As long as your blackhole routes are more specific than your  
connected routes, the blackhole routes would have higher priority.

Tony